TY - JOUR
T1 - Carbon monoxide as an intermediate product in the photocatalytic steam reforming of methane with lanthanum-doped sodium tantalate
AU - Sarwana, Wirya
AU - Anzai, Akihiko
AU - Takami, Daichi
AU - Yamamoto, Akira
AU - Yoshida, Hisao
N1 - Funding Information:
This work was financially supported by ISHIZUE 2020 of Kyoto University Research Development Program and the Program for Elements Strategy Initiative for Catalysts and Batteries (ESICB, JPMXP0112101003), commissioned by the MEXT of Japan. W. Sarwana is grateful to the Indonesia Endowment Fund for Education (LPDP), Ministry of Finance Indonesia Republic for financial support during the study.
Publisher Copyright:
© The Royal Society of Chemistry.
PY - 2021/8/21
Y1 - 2021/8/21
N2 - Photocatalytic steam reforming of methane (PSRM) has been studied as an attractive method to produce hydrogen by utilizing photoenergy like solar energy at around room temperature with metal-loaded photocatalysts, where methane and water are selectively converted to carbon dioxide and hydrogen. In the present study, we used a PSRM system using a flow reactor at around room temperature to yield the partially oxidized product, carbon monoxide (CO). It was found that some La-doped NaTaO3 samples can produce carbon monoxide constantly in addition to hydrogen and carbon dioxide. Among the prepared samples, a La(2 mol%)-doped NaTaO3 photocatalyst without any cocatalyst exhibited the highest photocatalytic activity and the highest CO selectivity of 24%. The CO yield depended on the photocatalysts and the reaction conditions. Suitable reaction conditions for CO yield were high light intensity, a higher flow rate, and a moderately high methane/water ratio. Some additional reaction tests revealed that water gas shift (WGS) can take place as an undesirable successive reaction, i.e., the produced carbon monoxide can successively react with water to form carbon dioxide, which would restrict the CO yield significantly.
AB - Photocatalytic steam reforming of methane (PSRM) has been studied as an attractive method to produce hydrogen by utilizing photoenergy like solar energy at around room temperature with metal-loaded photocatalysts, where methane and water are selectively converted to carbon dioxide and hydrogen. In the present study, we used a PSRM system using a flow reactor at around room temperature to yield the partially oxidized product, carbon monoxide (CO). It was found that some La-doped NaTaO3 samples can produce carbon monoxide constantly in addition to hydrogen and carbon dioxide. Among the prepared samples, a La(2 mol%)-doped NaTaO3 photocatalyst without any cocatalyst exhibited the highest photocatalytic activity and the highest CO selectivity of 24%. The CO yield depended on the photocatalysts and the reaction conditions. Suitable reaction conditions for CO yield were high light intensity, a higher flow rate, and a moderately high methane/water ratio. Some additional reaction tests revealed that water gas shift (WGS) can take place as an undesirable successive reaction, i.e., the produced carbon monoxide can successively react with water to form carbon dioxide, which would restrict the CO yield significantly.
UR - http://www.scopus.com/inward/record.url?scp=85113248110&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85113248110&partnerID=8YFLogxK
U2 - 10.1039/d1cy00264c
DO - 10.1039/d1cy00264c
M3 - Article
AN - SCOPUS:85113248110
VL - 11
SP - 5534
EP - 5542
JO - Catalysis Science and Technology
JF - Catalysis Science and Technology
SN - 2044-4753
IS - 16
ER -