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Use of CuO/MgAl 2 O 4 and La 0.8 Sr 0.2 FeO 3 /γ‐Al 2 O 3 in chemical looping reforming system for tar removal from gasification gas
Author(s) -
Keller Martin,
Leion Henrik,
Mattisson Tobias
Publication year - 2016
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.15034
Subject(s) - tar (computing) , chemistry , hydrocarbon , chemical engineering , mineralogy , nuclear chemistry , organic chemistry , computer science , engineering , programming language
Biomass gasification gas contains condensable hydrocarbons usually referred to as “tars.” The use of chemical‐looping reforming (CLR) has been proposed as a downstream technology for tar removal. The tar removal capabilities and the regeneration properties of two particularly promising bed materials, CuO/MgAl 2 O 4 and La 0.8 Sr 0.2 FeO 3 /γ‐Al 2 O 3 , were investigated using C 2 H 4 , C 6 H 6 , and C 7 H 8 as tar surrogates. The material La 0.8 Sr 0.2 FeO 3 /γ‐Al 2 O 3 exhibited high levels of conversion of all tar surrogates investigated, whereas CuO/MgAl 2 O 4 showed less promising behavior. For this material, the C 2 H 4 conversion in the absence of aromatic compounds was very high, but in the presence of monoaromatic compounds, the conversion of aromatics and C 2 H 4 was poor. This indicates that monoaromatic compounds hinder the conversion of C 2 H 4 effectively. Therefore, C 2 H 4 may not always be a good choice as a tar surrogate and its suitability may depend on the mechanism of hydrocarbon conversion on the bed material surface in question. © 2015 American Institute of Chemical Engineers AIChE J, 62: 38–45, 2016