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Fe2O3/CaO-Al2O3multifunctional catalyst for hydrogen production by sorption-enhanced chemical looping reforming of ethanol

Authors :
Saupsor, Janenipa
Wongsakulphasatch, Suwimol
Kim-Lohsoontorn, Pattaraporn
Bumroongsakulsawat, Palang
Kiatkittipong, Worapon
Ratchahat, Sakhon
Charojrochkul, Sumittra
Gong, Jinlong
Assabumrungrat, Suttichai
Source :
Biomass Conversion and Biorefinery; July 2023, Vol. 13 Issue: 10 p8651-8668, 18p
Publication Year :
2023

Abstract

Sorption-enhanced chemical looping reforming of ethanol for hydrogen production was investigated using Fe2O3as oxygen carrier and modified CaO-based Al2O3as CO2sorbent. Combined Fe2O3/CaO-Al2O3multifunctional catalysts were demonstrated and prepared by different methods including sol-gel, mechanical mixing, and impregnation at different Fe contents (5, 10, and 15 wt%). The results showed that the multifunctional catalyst prepared by impregnation method with 5 wt% Fe loading provided the highest H2purity of 70% in the pre-breakthrough period which lasted for 60 min at 600 °C. This was attributed to the preserving of Ca12Al14O33inert support in the structure during the preparation as shown by XRD results, leading to higher surface area as determined by N2physisorption and to prevention of particle agglomeration as evidenced by SEM-EDX. Although the H2production was inhibited by the presence of Ca2Fe2O5phase, a stable performance was found for at least 5 repeated cycles both for sorption capacity and oxygen carrier. The ease of decarbonation was also observed with this material as confirmed by DSC-TGA analysis. This highlighted the mutual advantages of Fe in CaO sorption stability and Ca in Fe oxygen carrier stability which could offset their intrinsic weak robustness.

Details

Language :
English
ISSN :
21906815 and 21906823
Volume :
13
Issue :
10
Database :
Supplemental Index
Journal :
Biomass Conversion and Biorefinery
Publication Type :
Periodical
Accession number :
ejs63415283
Full Text :
https://doi.org/10.1007/s13399-020-00947-z