Improving CO2 methanation performance by distributed feeding in a Ni-Mn catalyst fixed bed reactor

Aragüés-Aldea, P. ; Sanz-Martínez, A. (Universidad de Zaragoza) ; Durán, P. ; Francés, E. (Universidad de Zaragoza) ; Peña, J.A. (Universidad de Zaragoza) ; Herguido, J. (Universidad de Zaragoza)

Resumen: It has been successfully demonstrated the effect of feeding reactants in distributed manner for the reaction of methanation of CO2. This operation mode has improved not only the selectivity towards CH4, but also the overall process performance. A fixed bed reactor, loaded with Ni-Mn based catalyst, was operated co-feeding both CO2 and H2, but alternatively feeding one of them through several lateral inlets. Preserving the same global W/FCO2 ratio, the side distribution of CO2 allowed to clearly increase the activity of the process (e.g., at 375 °C, the conversion with distributed feeding was around 35% higher than that for the conventional one: XCO2 = 0.12 vs. XCO2 = 0.09). Furthermore, a substantially lower selectivity towards non-desired CO was obtained at any conversion level (e.g., SCO = 0.45 vs. SCO = 0.70, when XCO2 = 0.10). In addition, a more homogeneous temperature profile could be achieved in the bed without increasing the severity of hot spots appearance. On the contrary, side distribution of H2 always led to similar or worse results than for the conventional co-feeding configuration.

Idioma: Inglés

DOI: 10.1016/j.fuel.2022.124075

Año: 2022

Publicado en: Fuel 321 (2022), 124075 [7 pp.]
ISSN: 0016-2361

Factor impacto JCR: 7.4 (2022)

Categ. JCR: ENGINEERING, CHEMICAL rank: 19 / 141 = 0.135 (2022) - Q1 - T1
Categ. JCR: ENERGY & FUELS rank: 32 / 119 = 0.269 (2022) - Q2 - T1

Factor impacto CITESCORE: 12.2 - Energy (Q1) - Chemistry (Q1) - Chemical Engineering (Q1)

Factor impacto SCIMAGO: 1.38 - Chemical Engineering (miscellaneous) (Q1) - Organic Chemistry (Q1) - Fuel Technology (Q1) - Energy Engineering and Power Technology (Q1)

Financiación: info:eu-repo/grantAgreement/ES/DGA-FSE/T43-20R
Financiación: info:eu-repo/grantAgreement/ES/MICINN/PID2019-104866RB-I00
Financiación: info:eu-repo/grantAgreement/ES/MINECO/CTQ2016-77277-R

Tipo y forma: Artículo (Versión definitiva)

Área (Departamento): Área Ingeniería Química (Dpto. Ing.Quím.Tecnol.Med.Amb.)