TY - JOUR
T1 - SBA-15-supported iron phosphate catalyst for partial oxidation of methane to formaldehyde
AU - Wang, Ye
AU - Wang, Xiaoxing
AU - Su, Zheng
AU - Guo, Qian
AU - Tang, Qinghu
AU - Zhang, Qinghong
AU - Wan, Huilin
N1 - Funding Information:
This work was supported by the National Natural Science Foundation of China (Nos. 20273054 and 20021002), the Chinese Ministry of Science and Technology (No. G1999022408), the National Basic Research Program of China (grant No. 2003CB615803), the Scientific Research Foundation for the Returned Overseas Chinese Scholars, State Education Ministry and the Creative Research Foundation for Young Scientists by Fujian Province of China (No. 2001J029).
Copyright:
Copyright 2009 Elsevier B.V., All rights reserved.
PY - 2004/9/1
Y1 - 2004/9/1
N2 - SBA-15-supported iron phosphate (FePO4) has been characterized with XRD, TEM, Raman spectroscopy and H2-TPR, and studied for the partial oxidation of CH4 with O2. The characterizations suggest that the FePO4 species with loading amount lower than 40wt.% are encapsulated within the mesoporous channels of SBA-15, and these species possibly exist as small FePO4 clusters with the local coordination environment of iron being similar to that in the crystalline FePO4. However, these encapsulated FePO4 clusters could be reduced at remarkably lower temperatures than the crystalline FePO4. The SBA-15-supported FePO4 catalysts exhibit higher CH4 conversion and HCHO selectivity than the unsupported and the MCM-41-supported ones in the partial oxidation of CH4 with O2. The catalyst with a loading amount of 5wt.% shows the highest HCHO selectivity at a given CH4 conversion and the highest HCHO formation rate based on the amount of FePO4 in the catalyst. It is likely that the improved catalytic performances of the SBA-15-supported samples are related to the enhanced redox properties of FePO4 species, the large porous diameter and the high inertness of SBA-15.
AB - SBA-15-supported iron phosphate (FePO4) has been characterized with XRD, TEM, Raman spectroscopy and H2-TPR, and studied for the partial oxidation of CH4 with O2. The characterizations suggest that the FePO4 species with loading amount lower than 40wt.% are encapsulated within the mesoporous channels of SBA-15, and these species possibly exist as small FePO4 clusters with the local coordination environment of iron being similar to that in the crystalline FePO4. However, these encapsulated FePO4 clusters could be reduced at remarkably lower temperatures than the crystalline FePO4. The SBA-15-supported FePO4 catalysts exhibit higher CH4 conversion and HCHO selectivity than the unsupported and the MCM-41-supported ones in the partial oxidation of CH4 with O2. The catalyst with a loading amount of 5wt.% shows the highest HCHO selectivity at a given CH4 conversion and the highest HCHO formation rate based on the amount of FePO4 in the catalyst. It is likely that the improved catalytic performances of the SBA-15-supported samples are related to the enhanced redox properties of FePO4 species, the large porous diameter and the high inertness of SBA-15.
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U2 - 10.1016/j.cattod.2004.06.037
DO - 10.1016/j.cattod.2004.06.037
M3 - Conference article
AN - SCOPUS:4344714596
SN - 0920-5861
VL - 93-95
SP - 155
EP - 161
JO - Catalysis Today
JF - Catalysis Today
T2 - Selections from the Presentations of the 3rd Asia-Pacific Congress
Y2 - 12 October 2003 through 12 October 2003
ER -