TY - JOUR
T1 - A study on CO2 hydrogenation using a ceria-zirconia mixed oxide (CexZr1-xO2)-supported Fe catalyst
AU - Biswas, Saheli
AU - Kundu, Chandan
AU - Kulkarni, Aniruddha P.
AU - Kattel, Shyam
AU - Giddey, Sarbjit
AU - Bhattacharya, Sankar
N1 - Funding Information:
This work is funded by a PhD scholarship from Monash University. The funder was not involved in the study design; collection, analysis, and interpretation of data; the writing of the manuscript; or the decision to submit it for publication.
Publisher Copyright:
© 2021 American Chemical Society.
Copyright:
Copyright 2021 Elsevier B.V., All rights reserved.
PY - 2021/9/29
Y1 - 2021/9/29
N2 - Fe-impregnated CexZr1-xO2 supports were studied for CO2 methanation at 300, 400, and 500 °C under pressures 1 bar to 30 bars using a H2/CO2 (4:1 v/v) mixture, and their performance was compared to Fe-impregnated ZrO2. The variables affecting performance included temperature, pressure, and iron and cerium loadings. The iron loading that resulted in maximum CH4 selectivity and yield was 10 wt %. At 500 °C, Fe-CexZr1-xO2 increased the CO2 uptake of the catalyst and its conversion to CO and CH4 by more than 50% compared to Fe-ZrO2. As a result, CH4 yield monotonically increased with temperature, but for Fe-ZrO2, it gradually decreased with temperature. Contrarily, at lower temperatures, Fe-ZrO2 gave higher CO2 conversion and CH4 yield. The highest CH4 yield was 25% with 10% Fe-Ce0.1Zr0.9O2 at 500 °C and 30 bars. This composition was also found to be highly stable over a continuous testing period of 100 h at 500 °C and 20 bars. In situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) studies indicated the possibility of a formate-assisted pathway of CH4 formation on Fe-CexZr1-xO2.
AB - Fe-impregnated CexZr1-xO2 supports were studied for CO2 methanation at 300, 400, and 500 °C under pressures 1 bar to 30 bars using a H2/CO2 (4:1 v/v) mixture, and their performance was compared to Fe-impregnated ZrO2. The variables affecting performance included temperature, pressure, and iron and cerium loadings. The iron loading that resulted in maximum CH4 selectivity and yield was 10 wt %. At 500 °C, Fe-CexZr1-xO2 increased the CO2 uptake of the catalyst and its conversion to CO and CH4 by more than 50% compared to Fe-ZrO2. As a result, CH4 yield monotonically increased with temperature, but for Fe-ZrO2, it gradually decreased with temperature. Contrarily, at lower temperatures, Fe-ZrO2 gave higher CO2 conversion and CH4 yield. The highest CH4 yield was 25% with 10% Fe-Ce0.1Zr0.9O2 at 500 °C and 30 bars. This composition was also found to be highly stable over a continuous testing period of 100 h at 500 °C and 20 bars. In situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) studies indicated the possibility of a formate-assisted pathway of CH4 formation on Fe-CexZr1-xO2.
UR - http://www.scopus.com/inward/record.url?scp=85117126389&partnerID=8YFLogxK
U2 - 10.1021/acs.iecr.1c03044
DO - 10.1021/acs.iecr.1c03044
M3 - Article
AN - SCOPUS:85117126389
SN - 0888-5885
VL - 60
SP - 14410
EP - 14423
JO - Industrial & Engineering Chemistry Research
JF - Industrial & Engineering Chemistry Research
IS - 40
ER -