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CO 2 Capture in SOFC by Vapor Condensation and CH 4 Production in SOEC Storing Excess Electricity
Author(s) -
Schlitzberger C.,
Brinkmeier N. O.,
Leithner R.
Publication year - 2012
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.201100464
Subject(s) - methane , solid oxide fuel cell , natural gas , electricity generation , electricity , waste management , anode , exhaust gas , water vapor , chemistry , materials science , environmental science , chemical engineering , analytical chemistry (journal) , thermodynamics , power (physics) , engineering , electrode , environmental chemistry , electrical engineering , organic chemistry , physics
Simple CO 2 capture in combined solid oxide fuel cell (SOFC) gasification or reforming (of hydrocarbons – fossil or biomass) cycles by condensing the water vapor of the anode exhaust gas after CO shifting and H 2 recycling by a membrane is simulated. High efficiency of about 60 % is demonstrated. The separated CO 2 can be stored in a two‐chamber tank at the same pressure and temperature as methane on the two sides of a flexible membrane which divides the tank into chambers since 1 mol CH 4 results in 1 mol CO 2 . In a solid oxide electrolyzer cell (SOEC), CO 2 and steam can be recombined to CH 4 using excess electricity, e.g., produced by wind or solar power, and O 2 is left over. Thus, excess electricity can be stored chemically. Such a cycle allows hybrid vehicles with SOFC as range extender, running as zero‐emission vehicles also when using natural gas.