Rafael Bilbao

@article{Fonts2021,

title = {Thermodynamic and Physical Property Estimation of Compounds Derived from the Fast Pyrolysis of Lignocellulosic Materials},

author = {Isabel Fonts and María Atienza-Martínez and Hans-Heinrich Carstensen and Mario Benés and Anamaria Paiva Pinheiro Pires and Manuel Garcia-Perez and Rafael Bilbao},

url = {https://pubs.acs.org/doi/full/10.1021/acs.energyfuels.1c01709},

doi = {10.1021/ACS.ENERGYFUELS.1C01709},

year  = {2021},

date = {2021-01-01},

journal = {Energy & Fuels},

publisher = {American Chemical Society},

abstract = {The development of biomass pyrolysis oil refineries is a very promising path for the production of biofuels and bioproducts from lignocellulosic materials. Given that bio-oil is a complex mixture o...},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Adanez-Rubio2020a,

title = {Effect of H2S on the S-PAH formation during ethylene pyrolysis},

author = {Iñaki Adanez-Rubio and Ángela Millera and Rafael Bilbao and María U Alzueta},

doi = {10.1016/j.fuel.2020.118033},

issn = {00162361},

year  = {2020},

date = {2020-09-01},

journal = {Fuel},

volume = {276},

pages = {118033},

publisher = {Elsevier Ltd},

abstract = {The effect of the H2S presence on the formation of six different sulphurated polycyclic hydrocarbons (S-PAH), during the pyrolysis of ethylene-H2S mixtures, has been studied in a tubular flow reactor installation. Experiments with different inlet H2S concentrations (0.3, 0.5 and 1%) and temperatures of reaction (between 1075 and 1475 K) have been carried out. The 16 compounds that the Environmental Protection Agency (EPA) has stated as EPA-PAH priority pollutants were also analysed. EPA-PAH compounds were the majority of quantified PAH, and also S-PAH were found and quantified. For temperatures studied, the S-PAH/EPA-PAH ratio values showed a maximum value at 1075 K and a minimum value at 1175 K. With respect to the effect of the inlet concentration of H2S, the S-PAH/EPA-PAH ratio values increased with the increase of the H2S concentration.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Colom-Diaz2020,

title = {Study of the conversion of CH4/H2S mixtures at different pressures},

author = {Juan Manuel Colom-Díaz and M Leciñena and A Peláez and María Abián and Ángela Millera and Rafael Bilbao and María U Alzueta},

doi = {10.1016/j.fuel.2019.116484},

issn = {00162361},

year  = {2020},

date = {2020-02-01},

journal = {Fuel},

volume = {262},

pages = {116484},

publisher = {Elsevier Ltd},

abstract = {Due to the different scenarios where sour gas is present, its composition can be different and, therefore, it can be exploited through different processes, being combustion one of them. In this context, this work deals with the oxidation of CH4 and H2S at different pressures and under a wide variety of conditions. The oxidation has been evaluated experimentally in two different flow reactor set-ups, one working at atmospheric pressure and another one operating from atmospheric to high pressures (40 bar). Different CH4/H2S mixtures have been tested, together with different oxygen concentrations and in the temperature range of 500–1400 K. The experimental results obtained show that the oxidation of the CH4/H2S mixtures is shifted to lower temperatures as pressure increases, obtaining the same trends at atmospheric pressure in both experimental set-ups. H2S oxidation occurs prior to CH4 oxidation at all conditions, providing radicals to the system that promote CH4 oxidation to lower temperatures (compared to neat CH4 oxidation). This effect is more relevant as pressure increases. H2S oxidation is inhibited by CH4 at atmospheric pressure, being more noticeable when the CH4/H2S ratio is higher. At higher pressures, the H2S conversion occurs similarly in the absence or presence of CH4. The experimental results have been modeled with an updated kinetic model from previous works from the literature, which, in general, matches well the experimental trends, while some discrepancies between experimental and modeling results at atmospheric pressure and 40 bar are found in the conversion of H2S and CH4.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Colom-Diaz2019b,

title = {Influence of pressure on H2S oxidation. Experiments and kinetic modeling},

author = {Juan Manuel Colom-Díaz and María Abián and Ángela Millera and Rafael Bilbao and María U Alzueta},

doi = {10.1016/j.fuel.2019.116145},

issn = {00162361},

year  = {2019},

date = {2019-12-01},

journal = {Fuel},

volume = {258},

pages = {116145},

publisher = {Elsevier Ltd},

abstract = {The oxidation of H2S at different manometric pressures (0.6–40 bar), in the temperature range of 500–1000 K and under slightly oxidizing conditions ($łambda$ = 2), has been studied. Experiments have been performed in a quartz tubular flow reactor. The results have shown that H2S conversion shifts to lower temperatures as the pressure increases. The kinetic model used in this work is based on a previous one proposed by the authors to describe H2S oxidation at atmospheric pressure, which has been updated with a H2/O2 reaction subset for high pressures. Model results match fairly well the experimental ones both from the present work and from the literature. The reaction pathways of H2S oxidation analyzed are similar to the ones at atmospheric pressure. The differences are found in the radicals that are involved in the oxidation process at the different pressures. For a given temperature it is shown that, under the operating conditions of this work, pressure will have a major role than the gas residence time in the oxidation rate.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Abian2019a,

title = {Reactivity of Standard Diesel Particulate Matter with NO2 under Different Operating Conditions},

author = {María Abián and Ricardo Pernía and Ángela Millera and Rafael Bilbao and María U Alzueta},

url = {https://pubs.acs.org/sharingguidelines},

doi = {10.1021/acs.energyfuels.9b02779},

issn = {15205029},

year  = {2019},

date = {2019-11-01},

urldate = {2019-11-01},

journal = {Energy and Fuels},

volume = {33},

number = {11},

pages = {11932--11940},

publisher = {American Chemical Society},

abstract = {Nowadays, diesel vehicles include exhaust treatment technologies, such as diesel particulate filters, to meet the emission limitations of soot. Within the particle trap, soot can be oxidized by interaction with nitrogen oxides (NOx). The extent of this interaction will depend on the specific conditions at the trap, the nitrogen oxide considered (NO2 or NO), and the nature of the soot sample. In this context, the reactivity of a standard diesel particulate matter (SRM 1650b-NIST) with NO2 has been analyzed. The tests have been performed in a laboratory quartz gas flow reactor, discontinuous for the solid, in the 723-998 K temperature range and with 100-500 ppm NO2 as an oxidant. Additionally, the soot sample has been characterized through Raman spectrometry, Fourier transform infrared spectroscopy, and thermogravimetric analysis. Both temperature and inlet NO2 concentration are key parameters affecting the reactivity of soot with NO2. Temperatures ≥ 898 K are needed to achieve a complete conversion of carbon in soot and temperatures ≤ 973 K to limit the gas-phase conversion of NO2 into NO. Therefore, the experimental results from the tests performed in the 898-973 K temperature range have been used to determine the reaction kinetics (apparent activation energy and reaction order) of the reference diesel soot oxidation by NO2},

keywords = {},

pubstate = {published},

tppubtype = {article}

}