DOI: 10.1016/j.jcou.2018.05.005
Scopus记录号: 2-s2.0-85047354677
论文题名: Thermodynamic analysis of the CO2 methanation reaction with in situ water removal for biogas upgrading
作者: Catarina Faria A. ; Miguel C.V. ; Madeira L.M.
刊名: Journal of CO2 Utilization
ISSN: 22129820
出版年: 2018
卷: 26 起始页码: 271
结束页码: 280
语种: 英语
英文关键词: Membrane reactor
; Power-to-gas
; Sorption-enhanced reactor
; Substitute natural gas
; Water removal
Scopus关键词: Biogas
; Bioreactors
; Carbon dioxide
; Computer software
; Methanation
; Methane
; Natural gas
; Thermoanalysis
; Thermodynamic properties
; Membrane reactor
; Multifunctional reactor
; Power to gas
; Reaction equilibrium
; Substitute natural gas
; Temperature and pressures
; Thermo dynamic analysis
; Water removal
; Water injection
英文摘要: This study assessed, from the thermodynamic point of view, the feasibility of methane production using CO2 present in raw biogas. The thermodynamic analysis of the Sabatier reaction was performed using the Aspen Plus software and considering in situ water removal to displace the reaction equilibrium. The temperature and pressure were varied between 200 - 450 °C and 1 - 30 atm respectively, the typical operation ranges of industrial catalysts. The CH4/CO2 molar ratio in the feed stream was also varied to evaluate the influence of biogas composition on methane yield and selectivity. Two types of multifunctional reactors could be considered depending on the value of the water removal fraction (R): a membrane reactor for 0 < R < 0.99 and a sorption-enhanced reactor for R ≥ 0.99. Their performance was compared to that obtained with a traditional reactor, i.e. without water removal (R = 0). Water removal increases the CH4 yield but only up to an optimum R; above this value, coke formation is favoured. This optimum value depends on the temperature, pressure, CH4/CO2 ratio and was always below 0.99. The highest improvements on CH4 yield were achieved for the lowest CH4/CO2 ratio considered. Water removal can be also particularly useful to minimize the production of COX allowing to comply with the biogas quality specifications for injection into the natural gas grid. © 2018 Elsevier Ltd. All rights reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/111869
Appears in Collections: 气候减缓与适应
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作者单位: LEPABE, Department of Chemical Engineering, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias s/n, Porto, 4200-465, Portugal
Recommended Citation:
Catarina Faria A.,Miguel C.V.,Madeira L.M.. Thermodynamic analysis of the CO2 methanation reaction with in situ water removal for biogas upgrading[J]. Journal of CO2 Utilization,2018-01-01,26