Person: Águeda Maté, Vicente Ismael
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First Name
Vicente Ismael
Last Name
Águeda Maté
Affiliation
Universidad Complutense de Madrid
Faculty / Institute
Ciencias Químicas
Department
Ingeniería Química y de Materiales
Area
Ingeniería Química
Identifiers
2 results
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Item Synthetic natural gas production through biogas methanation using a sorption-enhanced reaction process(Separation and Purification Technology, 2024) Cañada Barcala, Andrés; Larriba Martínez, Marcos; Águeda Maté, Vicente Ismael; Delgado Dobladez, José AntonioUsing CO2 from biogenic sources to produce fuels is one of the most attractive applications in climate change mitigation, as it leads to the replacement of fossil fuels and contributes to the circular economy. By this means, the primary purpose of this paper is to design a biogas methanation process to produce synthetic natural gas (SNG) suitable to be fed into the gas grid. In this way, a SERP process was proposed in which the equilibrium is overcome by eliminating the co-produced water using a selective adsorbent, such as zeolite 3A. For this purpose, two different catalysts were (NiAl2O3 and Ni5A) and compared with a commercial catalyst. First, the catalytic performance of the three catalysts was studied in an experimental setup, discarding the Ni5A catalyst due to its lower reaction yields. Subsequently, a sorption-enhanced reaction process (SERP) was designed by simulation using the experimental kinetic data obtained and a theoretical model of reaction/adsorption cycles design. The PSASIM software, previously registered by the research group, was used for the simulation. The proposed process consisted of three main stages: a first reaction/adsorption stage where the biogas was upgraded to SNG with the corresponding water adsorption by the catalyst/adsorbent, and a second and third stages (purge and rinse) where the retained water in the adsorbent is desorbed and eliminated from the process. The process variables studied were temperature and biogas composition fed to the process. Finally, at 488 K and a residual waste biogas composition (55–60 % CH4), CO2 conversions of 99.55 % and selectivities towards methane of 99.99 % were achieved using NiAl2O3-zeolite3A mixture. In addition, the purity of the methane produced was 98.6 % molar in the product.Item Application of Sludge-Based Activated Carbons for the Effective Adsorption of Neonicotinoid Pesticides(Applied Sciences, 2021) Sanz-Santos, Eva; Álvarez-Torrellas, Silvia; Ceballos, Lucía; Larriba Martínez, Marcos; Águeda Maté, Vicente Ismael; García Rodríguez, JuanThe amount of sludge produced in wastewater treatment plants (WWTPs) has increased over the years, and the methods used to reduce this waste, such as incineration, agricultural use, or disposal in landfills, cause problems of secondary pollution. For this reason, it is necessary to find sustainable and low-cost solutions to manage this waste. Additionally, emerging and priority pollutants are attracting attention from the scientific community as they can generate health problems due to inadequate removal in conventional WWTPs. In this work, a pharmaceutical industry sludge was used as a precursor in the synthesis of four activated carbons (ACs) using different activating agents (ZnCl2, FeCl3∙6H2O, Fe(NO3)3∙9H2O, and Fe(SO4)3∙H2O), to be used for the removal by adsorption of three neonicotinoid pesticides included in latest EU Watch List (Decision 2018/840): acetamiprid (ACT), thiamethoxam (THM), and imidacloprid (IMD). The prepared ACs showed micro–mesoporous properties, obtaining relatively slow adsorption kinetics to reach equilibrium, but despite this, high values of adsorption capacity (qe) were obtained. For example, for AC-ZnCl2 (SBET = 558 m2/g), high adsorption capacities of qe = 128.9, 126.8, and 166.1 mg/g for ACT, THM, and IMD, respectively, were found. In most cases, the adsorption isotherms showed a multilayer profile, indicating an important contribution of the mesoporosity of the activated carbons in the adsorption process.