Lucía García

@article{lete_synthesis_2024,

title = {Synthesis of ketones from glycerol and 1,2-propanediol using copper and nickel catalysts: Unraveling the impact of reaction phase and active metal},

author = {Alejandro Lete and Raquel Raso and Lucía García and Joaquín Ruiz and Jesús Arauzo},

url = {https://www.sciencedirect.com/science/article/pii/S0016236124011499},

doi = {10.1016/j.fuel.2024.132001},

issn = {0016-2361},

year  = {2024},

date = {2024-09-01},

urldate = {2024-09-01},

journal = {Fuel},

volume = {371},

pages = {132001},

abstract = {Catalysts based on nickel-aluminum and copper–aluminum were synthesized through the coprecipitation method with a Ni or Cu content of 28 mol%, expressed as Ni/(Ni + Al) or Cu/(Cu + Al). The catalysts were calcined at 675 °C and thoroughly analyzed using various characterization techniques (ICP-OES, N2 adsorption–desorption, NH3-TPD, CO2-TPD, XRD, H2-TPR and elemental analysis). The samples were tested in two different reaction systems, gas phase at atmospheric pressure and liquid phase at 34 absolute bar, to investigate the production of ketones from glycerol and 1,2-propanediol under reaction conditions of 227 °C and a mass of catalyst/reagent mass flow rate ratio (W/m) of 10 gCatalyst·min/gReagent. The characterization results revealed catalysts with high specific surface area and nickel and copper metallic particles, exhibiting good catalytic activity towards liquid products. Gas phase reactions favored the generation of acetol and carbon deposits, which were minimal in liquid phase reactions. The active metal played a crucial role, and it was demonstrated that copper, with a higher number of acidic sites, exhibited greater selectivity towards ketones than the nickel catalyst. The best performance was achieved by the CuAl catalyst in the gas phase reaction of glycerol, with a conversion of 67.0 ± 4.0 %, a carbon selectivity to acetol in the liquid products of 61.4 % and a yield to acetol of 119.8 mgAcetol/gGlycerol.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{lete_catalytic_2024,

title = {Catalytic Conversion of 1,2-propanediol to 2-propanone: An Exploratory Study},

author = {Alejandro Lete and Lucía García and Joaquín Ruiz and Jesús Arauzo},

doi = {10.3303/CET24109023},

issn = {2283-9216},

year  = {2024},

date = {2024-01-01},

urldate = {2024-01-01},

journal = {Chemical Engineering Transactions},

volume = {109},

pages = {133–138},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{raso_aqueous_2023,

title = {Aqueous phase hydrogenolysis of glycerol with in situ generated hydrogen over Ni/Al3Fe1 catalyst: effect of the calcination temperature},

author = {Raquel Raso and Alejandro Lete and Lucía García and Joaquín Ruiz and Miriam Oliva and Jesús Arauzo},

url = {https://pubs.rsc.org/en/content/articlelanding/2023/ra/d2ra07929a},

doi = {10.1039/D2RA07929A},

issn = {2046-2069},

year  = {2023},

date = {2023-02-01},

urldate = {2023-02-01},

journal = {RSC Advances},

volume = {13},

number = {8},

pages = {5483–5495},

abstract = {The present work studied the influence of the calcination temperature on the aqueous phase hydrogenolysis of glycerol with in situ generated hydrogen over a Ni/Al3Fe1 catalyst. The Ni/Al3Fe1 catalyst was synthesized by the co-precipitation method at 28 mol% of Ni (Ni/(Ni + Al + Fe)) and a molar ratio of Al/Fe of 3/1. The prepared catalyst was calcined at different temperatures (500–750 °C). The obtained samples were tested for the aqueous phase hydrogenolysis (APH) of glycerol and characterized by several analytical techniques (ICP-OES, H2-TPR, XRD, N2-physisorption, NH3-TPD, STEM, FESEM, and TGA). The catalyst calcined at 625 °C was selected as the best sample due to its high acidity, metal dispersion, and catalytic activity; 1,2-propanediol was the highest carbon selectivity product. In addition, it experienced lower metal leaching than the catalyst calcined at 500 °C.},

note = {Publisher: The Royal Society of Chemistry},

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}

}

@article{Romero2021,

title = {Moodle and Socrative quizzes as formative aids on theory teaching in a chemical engineering subject},

author = {Enrique Romero and Lucía García and Jesús Ceamanos},

doi = {10.1016/j.ece.2021.03.001},

issn = {17497728},

year  = {2021},

date = {2021-07-01},

journal = {Education for Chemical Engineers},

volume = {36},

pages = {54--64},

publisher = {Elsevier B.V.},

abstract = {There is a majority opinion on the positive influence of using technologies in teaching. However, few studies account for their effect on students' final grades. Traditional theory teaching often shows a lack of students' motivation, engagement and self-efficacy. A way to improve these is to include quizzes, which may allow students to gain in skills acquisition feedback and self-regulation, and to control their own way to construct knowledge. The suggested methodology embeds quizzes and tests through two ICT, each one with a different strategy. One is the use of quick and real-time quizzes with Socrative, focused in promoting motivation and engagement in the classroom. The second is the use of tests with Moodle for a longer time scale (blocks of lessons). Both tests and quizzes were designed as formative activities: the students are able to gain feed-back, weaknesses identification and better programming of their work. Three ‘tools' (one Moodle test; three Socrative quizzes; no tool/only traditional teaching) were rotated among three different cohorts and blocks in a Chemical Engineering subject (n=49 students). Effects on the students' learning outcomes (grades) at the final theory exam were evaluated by blocks. A paired-data one-factor ANOVA test showed no significant statistical differences in using Moodle tests or Socrative quizzes or not. Some possible negative influences over data were identified and improvements for further study have been suggested. An intensification of quizzes and tests could be relevant. Although no significant improvement over grades was obtained, the use of both tools was positively valued for students and instructors. Surveys' results showed that the proposed methodology may create a more attractive and self-regulated educational environment. However, this study supports that students' previous perceptions about the tools may condition their final perceptions over the ICTs real aid for learning and their future academic outcomes.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}