Publicaciones

@article{Marrodan2022,

title = {An experimental and modeling study of acetylene-dimethyl ether mixtures oxidation at high-pressure},

author = {Lorena Marrodán and Ángela Millera and Rafael Bilbao and María U Alzueta},

url = {https://linkinghub.elsevier.com/retrieve/pii/S0016236122019846},

doi = {10.1016/J.FUEL.2022.125143},

issn = {0016-2361},

year  = {2022},

date = {2022-11-01},

urldate = {2022-11-01},

journal = {Fuel},

volume = {327},

pages = {125143},

publisher = {Elsevier},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Gil-Lalaguna2022,

title = {CO2 adsorption on pyrolysis char from protein-containing livestock waste: How do proteins affect?},

author = {Noemí Gil-Lalaguna and África Navarro-Gil and Hans-Heinrich Carstensen and Joaquín Ruiz and Isabel Fonts and Jesús Ceamanos and María Benita Murillo and Gloria Gea},

doi = {10.1016/J.SCITOTENV.2022.157395},

issn = {0048-9697},

year  = {2022},

date = {2022-11-01},

urldate = {2022-11-01},

journal = {Science of The Total Environment},

volume = {846},

pages = {157395},

publisher = {Elsevier},

abstract = {Biogas generation through anaerobic digestion provides an interesting opportunity to valorize some types of animal waste materials whose management is increasingly complicated by legal and environmental restrictions. To successfully expand anaerobic digestion in livestock areas, operational issues such as digestate management must be addressed in an economical and environmentally sustainable way. Biogas upgrading is another necessary stage before intending it to add-value applications. The high concentration of CO2 in biogas results in a reduced caloric value, so the removal of CO2 would be beneficial for most end-users. The current work evaluates the CO2 uptake properties (thermogravimetry study) of low-cost adsorbent materials produced from the animal wastes generated in the livestock area itself, specifically via pyrolysis of poorly biodegradable materials, such as meat and bone meal, and the digestate from manure anaerobic digestion. Therefore, the new element in this study with respect to other studies found in the literature related to biochar-based CO2 adsorption performance is the presence of high content of pyrolyzed proteins in the adsorbent material. In this work, pyrolyzed chars from both meat and bone meal and co-digested manure have been proven to adsorb CO2 reversibly, and also the chars produced from their representative pure proteins (collagen and soybean protein), which were evaluated as model compounds for a better understanding of the individual performance of proteins. The ultra-microporosity developed in the protein chars during pyrolysis seems to be the main explanation for such CO2 uptake capacities, while neither the BET surface area nor N-functionalities on the char surface can properly explain the observed results. Although the CO2 adsorption capacities of these pristine chars (6–41.0 mg CO2/g char) are far away from data of commercially activated carbons ($sim$80 mg CO2/g char), this application opens a new via to integrate and valorize these wastes in the circular economy of the primary sector.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Marrodan2022b,

title = {Experimental and Modeling Evaluation of Dimethoxymethane as an Additive for High-Pressure Acetylene Oxidation},

author = {Lorena Marrodán and Ángela Millera and Rafael Bilbao and María U Alzueta},

url = {https://pubs.acs.org/doi/full/10.1021/acs.jpca.2c03130},

doi = {10.1021/ACS.JPCA.2C03130},

issn = {1089-5639},

year  = {2022},

date = {2022-09-01},

urldate = {2022-09-01},

journal = {The Journal of Physical Chemistry A},

volume = {2022},

pages = {6263},

publisher = {American Chemical Society},

abstract = {The high-pressure oxidation of acetylene–dimethoxymethane (C2H2–DMM) mixtures in a tubular flow reactor has been analyzed from both experimental and modeling perspectives. In addition to pressure (...},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Bourgalais2022,

title = {Product Identification in the Low-Temperature Oxidation of Cyclohexane Using a Jet-Stirred Reactor in Combination with SVUV-PEPICO Analysis and Theoretical Quantum Calculations},

author = {Jérémy Bourgalais and Hans-Heinrich Carstensen and Olivier Herbinet and Gustavo A. Garcia and Philippe Arnoux and Luc-Sy Tran and Guillaume Vanhove and Laurent Nahon and Majdi Hochlaf and Frédérique Battin-Leclerc},

url = {https://pubs.acs.org/doi/full/10.1021/acs.jpca.2c04490},

doi = {10.1021/ACS.JPCA.2C04490/ASSET/IMAGES/MEDIUM/JP2C04490_0020.GIF},

issn = {1089-5639},

year  = {2022},

date = {2022-09-01},

journal = {The Journal of Physical Chemistry A},

volume = {126},

number = {34},

pages = {5784--5799},

publisher = {American Chemical Society (ACS)},

abstract = {Cyclohexane oxidation chemistry was investigated using a near-atmospheric pressure jet-stirred reactor at T = 570 K and equivalence ratio ϕ = 0.8. Numerous intermediates including hydroperoxides an...},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Tran2022,

title = {Chemical kinetics of cyclic ethers in combustion},

author = {Luc Sy Tran and Olivier Herbinet and Hans-Heinrich Carstensen and Frédérique Battin-Leclerc},

doi = {10.1016/J.PECS.2022.101019},

issn = {0360-1285},

year  = {2022},

date = {2022-09-01},

urldate = {2022-09-01},

journal = {Progress in Energy and Combustion Science},

volume = {92},

pages = {101019},

publisher = {Pergamon},

abstract = {Cyclic Ethers (CEs) belong to a class of compounds of importance to understand the chemistry of both the engine auto-ignition of hydrocarbon fuels and the combustion of oxygenated biofuels. This article, divided in six parts, aims at systematically analyzing how up-to-date experimental and theoretical methods were applied to unveil the gas-phase oxidation chemistry of these compounds. The first part gives a brief overview on the significance of CEs as intermediates formed during alkane low-temperature oxidation summarizing its generally accepted chemical mechanism. This part also addresses the role of CEs as potential biofuels derived from lignocellulosic biomass and discusses the production methods of these molecules and their combustion performances in engine. The second part presents the different theoretical methods dedicated to calculate the electronic structure, thermochemical and kinetic data of CEs. The third part introduces the experimental methods used in studies related to CEs with a special focus on mass spectrometry and gas chromatography. The fourth part reviews the experimental and modeling studies related to CE formation during the low-temperature oxidation of linear, branched, cyclic alkanes, alkylbenzenes, olefins, and oxygenated fuels. The fifth part analyses the published work concerning the CE degradation chemistry and highlights the dominant involved reactions. To finish, the sixth part concludes and proposes future research directions.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Mendez2022,

title = {Biomass-derived activated carbon as catalyst in the leaching of metals from a copper sulfide concentrate},

author = {A. Méndez and M. L. Álvarez and J. M. Fidalgo and Christian Di Stasi and Joan Josep Manyà and G. Gascó},

url = {https://linkinghub.elsevier.com/retrieve/pii/S0892687522002047},

doi = {10.1016/J.MINENG.2022.107594},

issn = {0892-6875},

year  = {2022},

date = {2022-06-01},

urldate = {2022-06-01},

journal = {Minerals Engineering},

volume = {183},

pages = {107594},

publisher = {Pergamon},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Greco2022,

title = {Biomass-derived carbons physically activated in one or two steps for CH4/CO2 separation},

author = {Gianluca Greco and Rafael L. S. Canevesi and Christian Di Stasi and Alain Celzard and Vanessa Fierro and Joan Josep Manyà},

url = {https://linkinghub.elsevier.com/retrieve/pii/S0960148122004967},

doi = {10.1016/J.RENENE.2022.04.035},

issn = {0960-1481},

year  = {2022},

date = {2022-05-01},

urldate = {2022-05-01},

journal = {Renewable Energy},

volume = {191},

pages = {122--133},

publisher = {Pergamon},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Ilarri2022,

title = {Traffic and Pollution Modelling for Air Quality Awareness: An Experience in the City of Zaragoza},

author = {Sergio Ilarri and Raquel Trillo-Lado and Lorena Marrodán},

url = {https://link.springer.com/article/10.1007/s42979-022-01105-0},

doi = {10.1007/S42979-022-01105-0},

issn = {2661-8907},

year  = {2022},

date = {2022-05-01},

journal = {SN Computer Science 2022 3:4},

volume = {3},

number = {4},

pages = {1--33},

publisher = {Springer},

abstract = {Air pollution due to the presence of small particles and gases in the atmosphere is a major cause of health problems. In urban areas, where most of the population is concentrated, traffic is a major source of air pollutants (such as nitrogen oxides or $$hbox NO_x$$ and carbon monoxide or CO). Therefore, for smart cities, carrying out an adequate traffic monitoring is a key issue, since it can help citizens to make better decisions and public administrations to define appropriate policies. Thus, citizens could use these data to make appropriate mobility decisions. In the same way, a city council can exploit the collected data for traffic management and for the establishment of suitable traffic policies throughout the city, such as restricting the traffic flow in certain areas. For this purpose, a suitable modelling approach that provides the estimated/predicted values of pollutants at each location is needed. In this paper, an approach followed to model traffic flow and air pollution dispersion in the city of Zaragoza (Spain) is described. Our goal is to estimate the air quality in different areas of the city, to raise awareness and help citizens to make better decisions; for this purpose, traffic data play an important role. In more detail, the proposal presented includes a traffic modelling approach to estimate and predict the amount of traffic at each road segment and hour, by combining historical measurements of real traffic of vehicles and the use of the SUMO traffic simulator on real city roadmaps, along with the application of a trajectory generation strategy that complements the functionalities of SUMO (for example, SUMO's calibrators). Furthermore, a pollution modelling approach is also provided, to estimate the impact of traffic flows in terms of pollutants in the atmosphere: an R package called Vehicular Emissions INventories (VEIN) is used to estimate the amount of $$hbox NO_x$$ generated by the traffic flows by taking into account the vehicular fleet composition (i.e., the types of vehicles, their size and the type of fuel they use) of the studied area. Finally, considering this estimation of $$hbox NO_x$$ , a service capable of offering maps with the prediction of the dispersion of these atmospheric pollutants in the air has been established, which uses the Graz Lagrangian Model (GRAL) and takes into account the meteorological conditions and morphology of the city. The results obtained in the experimental evaluation of the proposal indicate a good accuracy in the modelling of traffic flows, whereas the comparison of the prediction of air pollutants with real measurements shows a general underestimation, due to some limitations of the input data considered. In any case, the results indicate that this first approach can be used for forecasting the air pollution within the city.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Alexandrino2022,

title = {Experimental and simulation study of the high pressure oxidation of dimethyl carbonate},

author = {Katiuska Alexandrino and Ángela Millera and Rafael Bilbao and María U Alzueta},

doi = {10.1016/J.FUEL.2021.122154},

issn = {0016-2361},

year  = {2022},

date = {2022-02-01},

urldate = {2022-02-01},

journal = {Fuel},

volume = {309},

pages = {122154},

publisher = {Elsevier},

abstract = {An experimental and modeling study of the oxidation at high pressure of dimethyl carbonate (DMC) has been performed in a quartz tubular flow reactor. Experimental and simulated concentrations of DMC, CO, CO2 and H2 have been obtained for different temperatures (500–1073 K), pressures (20, 40, and 60 atm) and stoichiometries ($łambda$ = 0.7, 1, and 35). Both pressure and concentration of oxygen are important parameters for conversion of DMC. The simulations have been carried out using a detailed kinetic mechanism previously developed by the research group. In general, the model is able to reproduce the experimental trends of the different concentration profiles, although some discrepancies are observed between experimental and simulation results. The performance of the model was also evaluated through the simulation of literature data of the oxidation of DMC at atmospheric pressure in a flow reactor and of the DMC ignition delay times under low and high pressures. In this sense, this work contributes to the knowledge of the combustion process of DMC, by providing new experimental data on the conversion of DMC at high pressures and using a kinetic model for the interpretation of the results.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Alzueta2022,

title = {Interaction of NH3 and NO under combustion conditions. Experimental flow reactor study and kinetic modeling simulation},

author = {María U Alzueta and L. Ara and Víctor D Mercader and M. Delogu and Rafael Bilbao},

doi = {10.1016/j.combustflame.2021.111691},

issn = {15562921},

year  = {2022},

date = {2022-01-01},

urldate = {2022-01-01},

journal = {Combustion and Flame},

volume = {235},

publisher = {Elsevier Inc.},

abstract = {The interaction between ammonia and NO under combustion conditions is analyzed in the present work, from both experimental and kinetic modelling points of view. An experimental systematic study of the influence of the main variables for the NH3[sbnd]NO interaction is made using a laboratory tubular flow reactor installation. Experiments are performed at atmospheric pressure and variables analyzed include: temperature in the 700–1500 K range, air stoichiometry, from pyrolysis to very oxidizing conditions, and the NH3/NO ratio, in the 0.7–3.5 range. Nitrogen and argon have been used as diluent gas. A literature reaction mechanism has been used to simulate the present experimental results and discuss the main findings. Reaction path analysis has allowed the identification of the reaction routes under the studied conditions. The simulations reflect the main experimental trends observed. Main results show that NO reduction by NH3 occurs at any conditions studied, but is more intense under oxygen excess conditions. Interactions of NH3 and NO proceeds in a molar basis with optimum conversions of NO of up to almost 100%.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Alexandrino2022b,

title = {Experimental and simulation study of the high pressure oxidation of dimethyl carbonate},

author = {Katiuska Alexandrino and Ángela Millera and Rafael Bilbao and María U Alzueta},

doi = {10.1016/j.fuel.2021.122154},

issn = {00162361},

year  = {2022},

date = {2022-01-01},

urldate = {2022-01-01},

journal = {Fuel},

volume = {309},

number = {October 2021},

abstract = {An experimental and modeling study of the oxidation at high pressure of dimethyl carbonate (DMC) has been performed in a quartz tubular flow reactor. Experimental and simulated concentrations of DMC, CO, CO2 and H2 have been obtained for different temperatures (500–1073 K), pressures (20, 40, and 60 atm) and stoichiometries ($łambda$ = 0.7, 1, and 35). Both pressure and concentration of oxygen are important parameters for conversion of DMC. The simulations have been carried out using a detailed kinetic mechanism previously developed by the research group. In general, the model is able to reproduce the experimental trends of the different concentration profiles, although some discrepancies are observed between experimental and simulation results. The performance of the model was also evaluated through the simulation of literature data of the oxidation of DMC at atmospheric pressure in a flow reactor and of the DMC ignition delay times under low and high pressures. In this sense, this work contributes to the knowledge of the combustion process of DMC, by providing new experimental data on the conversion of DMC at high pressures and using a kinetic model for the interpretation of the results.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Alzueta2022a,

title = {Conversion of NH3 and NH3-NO mixtures in a CO2 atmosphere. A parametric study},

author = {María U Alzueta and Jorge Giménez-López and Víctor D Mercader and Rafael Bilbao},

doi = {10.1016/j.fuel.2022.125133},

issn = {00162361},

year  = {2022},

date = {2022-01-01},

urldate = {2022-01-01},

journal = {Fuel},

volume = {327},

number = {April},

abstract = {The present work addresses the oxidation of ammonia and ammonia-nitric oxide mixtures in a CO2 atmosphere, characteristic of oxy-fuel processes and/or biogas combustion, from both experimental and kinetic modelling points of view. A parametric study of NH3 and NH3/NO mixtures oxidation is carried out, evaluating the influence of the temperature (700–1500 K), stoichiometry (from pyrolysis, $łambda$ = 0, to significantly oxidizing conditions, $łambda$ = 3.3), gas residence time (low values, 195/T(K) s and high values, 3100/T(K) s) and NH3/NO ratio (0.5–2.2), at atmospheric pressure under well-controlled laboratory conditions using two tubular flow reactor setups. Experimental results have been simulated with an updated literature reaction mechanism, which has been used to interpret the experimental observations.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Bourgalais2021,

title = {Jet-Stirred Reactor Study of Low-Temperature Neopentane Oxidation: A Combined Theoretical, Chromatographic, Mass Spectrometric, and PEPICO Analysis},

author = {Jérémy Bourgalais and Olivier Herbinet and Hans-Heinrich Carstensen and Janney Debleza and Gustavo A. Garcia and Philippe Arnoux and Luc Sy Tran and Guillaume Vanhove and Binzhi Liu and Zhandong Wang and Majdi Hochlaf and Laurent Nahon and Frédérique Battin-Leclerc},

url = {https://pubs.acs.org/doi/full/10.1021/acs.energyfuels.1c02080},

doi = {10.1021/ACS.ENERGYFUELS.1C02080/SUPPL_FILE/EF1C02080_SI_002.XLSX},

issn = {15205029},

year  = {2021},

date = {2021-12-01},

urldate = {2021-12-01},

journal = {Energy and Fuels},

volume = {35},

number = {23},

pages = {19689--19704},

publisher = {American Chemical Society},

abstract = {The oxidation of neopentane was studied in jet-stirred reactors at atmospheric pressure over a temperature range 500-850 K and $phi$ = 0.5. The products were analyzed with chromatographic, mass spectrometric, and photoelectron spectroscopic setups complemented with theoretical calculations. This combination provides a comparison of photo-ionization mass spectrometry and gas chromatography for the quantification of mole fractions and highlights the relevant differences between them, while mass-tagged photoelectron spectroscopy sheds light onto the isomeric distribution. The new data and corresponding analyses are expected to provide valuable guidance for an extension of the kinetic model and the choice of experimental methods. The main first and second O2-addition products were observed in agreement with the literature (e.g., 3,3-dimethyloxetane, acetone, isobutene, and ?-ketohydroperoxide). The simulated mole fractions of the products using a literature kinetic model were compared to the experimental results. Even though the kinetic model has been validated previously, significant discrepancies between the measured and simulated mole fractions of 2-methylpropanal and methacrolein, two fuel-specific low-temperature oxidation products, were found. Furthermore, some experimentally observed species related to ?-ketohydroperoxide decomposition were not predicted indicating that the model is incomplete. The detection of 2-methylpropanal and formic acid highlighted the importance of the Korcek-type pathway.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Renda2021,

title = {Biochar as support in catalytic CO2 methanation: Enhancing effect of CeO2 addition},

author = {Simona Renda and Christian Di Stasi and Joan Josep Manyà and Vincenzo Palma},

url = {https://linkinghub.elsevier.com/retrieve/pii/S2212982021003073},

doi = {10.1016/J.JCOU.2021.101740},

issn = {2212-9820},

year  = {2021},

date = {2021-11-01},

journal = {Journal of CO2 Utilization},

volume = {53},

pages = {101740},

publisher = {Elsevier},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Greco2021,

title = {Importance of pyrolysis temperature and pressure in the concentration of polycyclic aromatic hydrocarbons in wood waste-derived biochars},

author = {Gianluca Greco and María Videgain and Christian Di Stasi and Elisabet Pires and Joan Josep Manyà},

doi = {10.1016/J.JAAP.2021.105337},

issn = {0165-2370},

year  = {2021},

date = {2021-10-01},

journal = {Journal of Analytical and Applied Pyrolysis},

volume = {159},

pages = {105337},

publisher = {Elsevier},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Videgain2021,

title = {Influence of Feedstock and Final Pyrolysis Temperature on Breaking Strength and Dust Production of Wood-Derived Biochars},

author = {María Videgain and Joan Josep Manyà and Mariano Vidal and Eva Cristina Correa and Belén Diezma and Francisco Javier García-Ramos and Ana Méndez},

url = {https://www.mdpi.com/2071-1050/13/21/11871/htm https://www.mdpi.com/2071-1050/13/21/11871},

doi = {10.3390/SU132111871},

issn = {2071-1050},

year  = {2021},

date = {2021-10-01},

urldate = {2021-10-01},

journal = {Sustainability 2021, Vol. 13, Page 11871},

volume = {13},

number = {21},

pages = {11871},

publisher = {Multidisciplinary Digital Publishing Institute},

abstract = {The susceptibility to fragmentation of biochar is an important property to consider in field applications. Physical and mechanical properties of wood-derived biochars from vine shoots and holm oak were studied to evaluate the effect of biomass feedstock, final pyrolysis temperature and application conditions. Vine shoots and holm oak pruning residues were selected for biochar production. Slow pyrolysis experiments were conducted at two different final temperatures (400 and 600 °C). Physical and chemical characteristics of biomass and biochars were determined. Impact strength was evaluated through the measurement of the gravitational potential energy per unit area (J mm−2) necessary for the breakage of biochar fragments. Shear strength (N mm−2) and a combination of shear/compression strengths (N) were analyzed using a Universal Texture Analyzer. A particular mechanical treatment was carried out on biochar samples to simulate the processing bodies of a commercial manure spreader, under two gravimetric moisture contents. Holm oak-derived biochar was more resistant than vine shoot-derived biochar to the applied forces. Vine shoots-derived biochar did not show a significantly different mechanical behavior between temperatures. Holm Oak-derived biochar produced at the higher final pyrolysis temperature showed higher resistance to be broken into smaller pieces. Moistening resulted in an adequate practice to improve mechanical spreading.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Abian2021,

title = {Study of the oxidation of ammonia in a flow reactor. Experiments and kinetic modeling simulation},

author = {María Abián and Mario Benés and A Goñi and B Muñoz and María U Alzueta},

doi = {10.1016/J.FUEL.2021.120979},

issn = {0016-2361},

year  = {2021},

date = {2021-09-01},

journal = {Fuel},

volume = {300},

pages = {120979},

publisher = {Elsevier},

abstract = {The present work is focused on the analysis of the ammonia oxidation process and the formation of main nitrogen oxides (NO, NO2 and N2O) over a wide range of temperatures and O2 reaction environments. Experiments are performed at atmospheric pressure in a laboratory quartz tubular flow reactor, covering the temperature range of 875 to 1450 K and for different air excess ratios (from pyrolysis to very oxidizing conditions). The experimental results are simulated and interpreted in terms of a detailed chemical-kinetic mechanism. Reaction path and sensitivity analyses are used to delineate the NH3 oxidation scheme.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Alzueta2021,

title = {Interaction of NH3 and NO under combustion conditions. Experimental flow reactor study and kinetic modeling simulation},

author = {María U Alzueta and L Ara and Víctor D Mercader and M Delogu and Rafael Bilbao},

url = {https://linkinghub.elsevier.com/retrieve/pii/S001021802100434X},

doi = {10.1016/J.COMBUSTFLAME.2021.111691},

issn = {0010-2180},

year  = {2021},

date = {2021-08-01},

urldate = {2021-08-01},

journal = {Combustion and Flame},

pages = {111691},

publisher = {Elsevier},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Stasi2021,

title = {Wheat-Straw-Derived Activated Biochar as a Renewable Support of Ni-CeO2 Catalysts for CO2 Methanation},

author = {Christian Di Stasi and Simona Renda and Gianluca Greco and Belén González and Vincenzo Palma and Joan Josep Manyà},

url = {https://www.mdpi.com/2071-1050/13/16/8939/htm https://www.mdpi.com/2071-1050/13/16/8939},

doi = {10.3390/SU13168939},

year  = {2021},

date = {2021-08-01},

journal = {Sustainability 2021, Vol. 13, Page 8939},

volume = {13},

number = {16},

pages = {8939},

publisher = {Multidisciplinary Digital Publishing Institute},

abstract = {Ceria- and urea-doped activated biochars were used as support for Ni-based catalysts for CO2 methanation purposes. Different materials were prepared and tested to find the best catalytic formulation. After several CO2 methanation experiments—carried out at 0.35–1.0 MPa and 300–500 °C—it was found that the most suitable catalyst was a wheat-straw-derived activated biochar loaded with 30 wt.% of CeO2 and 20 wt.% of Ni. Using this catalyst, a CO2 conversion of 65% with a CH4 selectivity of 95% was reached at 1.0 MPa, 400 °C, and 13,200 h−1. From the study of the influence of the gas hourly space velocity, it was deduced that the most likely reaction mechanism was a reverse water–gas shift reaction, followed by CO hydrogenation. N-doping of the carbon support as an alternative to the use of ceria was also investigated. However, both CO2 conversion and selectivity toward CH4 values were clearly lower than those obtained for the ceria-containing catalyst cited above. The outcomes of this work indicate that a renewable biomass-derived support can be effectively employed in the catalytic conversion of CO2 to methane.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Fortea2021,

title = {An Insight into the Separation of 1,2-Propanediol, Ethylene Glycol, Acetol and Glycerol from an Aqueous Solution by Adsorption on Activated Carbon},

author = {Jorge Fortea and Lucía García and Joaquín Ruiz and Miriam Oliva and Jesús Arauzo},

url = {https://www.mdpi.com/2227-9717/9/8/1438/htm https://www.mdpi.com/2227-9717/9/8/1438},

doi = {10.3390/PR9081438},

issn = {2227-9717},

year  = {2021},

date = {2021-08-01},

journal = {Processes 2021, Vol. 9, Page 1438},

volume = {9},

number = {8},

pages = {1438},

publisher = {Multidisciplinary Digital Publishing Institute},

abstract = {Glycerol conversion processes such as aqueous phase reforming and hydrogenolysis generate value-added compounds highly diluted in water. Because distillation is a high energy demand separation step, adsorption could be an attractive alternative to recover these chemicals. Adsorption isotherms of 1,2-propanediol, acetol, ethylene glycol and glycerol onto activated carbon were determined by batch adsorption experiments. These isotherms were fitted slightly better to the Freundlich equation than to the Langmuir equation. Acetol is the compound with the highest adsorption at concentrations smaller than 1 M. Properties of the adsorbate such as the −OH group number, chain length, molecular size and dipole moment, besides characteristics of the adsorbent such as the surface area, oxygen and ash content, are considered to explain the observed results. Moreover, adsorption experiments were performed with mixtures of compounds and it was determined that the molar amount adsorbed is less than predicted from the adsorption isotherms of the individual compounds treated separately. In addition, the influence of the activated carbon thermal pre-treatment temperature on the adsorption capacity has been studied, the optimum being 800 °C. An analysis of the influence of the activated carbon characteristics showed that the most important parameters are the total pore volume and the ash content.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}