Ns: Conceptualization, A.A., R.D.A., M.H.A.-A.
Ns: Conceptualization, A.A., R.D.A., M.H.A.-A., M.S.Z. as well as a.F.A.-H.; Data curation, R.D.A., M.Z., M.A. and F.A.; Formal evaluation, M.S.Z. and also a.F.A.-H.; Sources, M.Z. and M.A.; A.A., R.D.A., M.Z., M.A., F.A., M.B., M.H.A.-A., M.S.Z. as well as a.F.A.-H.; Alvelestat tosylate Investigation, A.A., R.D.A., M.Z., M.A., F.A., M.H.A.-A., M.S.Z. and a.F.A.-H.; Methodology, A.A., R.D.A., F.A., M.B., M.H.A.-A., Mohamed Validation, A.A. All authors have study and agreed for the published version on the manuscript. Funding: This analysis was funded by Ministry of Education and King Abdulaziz University, grant number IFRC-011-829-2020. Institutional Evaluation Board Statement: Not applicable. Informed Consent Statement: Not applicable. Data Availability Statement: The information presented within this study are offered on request in the corresponding author. Acknowledgments: The authors extend their appreciation towards the Deputyship for Study Innovation, Ministry of Education in Saudi Arabia for funding this research function by way of the project number (IFRC-011-829-2020) and King Abdulaziz University, DSR, Jeddah, Saudi Arabia. Conflicts of Interest: The authors declare no conflict of (Z)-Semaxanib c-Met/HGFR interest.
processesArticleAlkali and Alkali-Earth Metals Incorporation to Ni/USY Catalysts for CO2 Methanation: The Effect in the Metal NatureM. Carmen Bacariza 1, , Cl dia Grilo 1 , Paula Teixeira 1 , JosM. Lopes 1,and Carlos Henriques 1,Centro de Qu ica Estrutural (CQE), Instituto Superior T nico, Universidade de Lisboa, Avenida Rovisco Pais, 1049-001 Lisboa, Portugal; [email protected] (C.G.); [email protected] (P.T.); [email protected] (J.M.L.); [email protected] (C.H.) Departamento de Engenharia Qu ica (DEQ), Instituto Superior T nico, Universidade de Lisboa, Avenida Rovisco Pais, 1049-001 Lisboa, Portugal Correspondence: [email protected]: Bacariza, M.C.; Grilo, C.; Teixeira, P.; Lopes, J.M.; Henriques, C. Alkali and Alkali-Earth Metals Incorporation to Ni/USY Catalysts for CO2 Methanation: The Impact on the Metal Nature. Processes 2021, 9, 1846. https://doi.org/10.3390/ pr9101846 Academic Editors: Paola Ammendola and Vincent Terrasson Received: 22 July 2021 Accepted: 14 October 2021 Published: 18 OctoberAbstract: CO2 methanation is normally carried out applying Ni-supported catalysts containing promoters including alkali or alkali-earth metals to improve their properties. Within this perform, bimetallic Ni-based USY zeolite catalysts containing alkali (Li, K and Cs) and alkali-earth (Mg, Ca) metal compounds had been ready employing the identical situations (15 wt of metals; co-impregnation), characterized by N2 sorption, XRD, TGA, CO2 adsorption esorption, DRS UV-Vis and H2 -TPR, and ultimately applied in CO2 methanation reaction (86,one hundred mL h-1 g-1 , PCO2 = 0.16 bar, H2 :CO2 = four:1). For every group, the effects of the second metal nature around the properties and performances were assessed. Alkali metals incorporation induced considerably low catalytic performances (CH4 yields 26 ), attributed to their damaging impact on zeolite structure preservation. Around the contrary, alkali-earth metal-containing catalysts exhibited reduce structural damage. Having said that, the formation of Ni-Mg mixed oxides in Ni-Mg/USY catalyst and CaCO3 throughout the reaction in Ni-Ca/USY sample could clarify their performances, comparable or decrease than these obtained for Ni/USY catalyst. Among the studied metals, calcium was identified because the most interesting (CH4 yield of 65 at 415 C.
