TY - JOUR
T1 - The preparation and oxygen storage/release properties of oxysulfates containing cerium as oxygen storage material
AU - Wang, Nan
AU - Cui, Mifen
AU - Chen, Xian
AU - Tang, Jihai
AU - Qiao, Xu
PY - 2011/6
Y1 - 2011/6
N2 - (La1-x Cex)2O2SO4 (x=0, 0.5, 1) and CuCeOxSO4 were synthesized by a template-assisted route and characterized by means of XRD, FT-IR, BET, TPR, TPO and O2-pulse. The results showed that the reduction temperature of Ce2O2SO4 and LaCeO2SO4 were significantly lower than that of La2O2SO4 in TPR. The reduction temperature range of Ce2O2SO4, LaCeO2SO4 and La2O2SO4 occurred in 550-780°C(mainly in 650-780°C), 600-760°C(mainly in 650-750°C) and 770-930°C, respectively. The hydrogen consumption of Ce2O2SO4 and LaCeO2SO4 reached 4.6 molH2/mol and 4.4 molH2/mol, respectively. The oxidation temperature range of Ce2O2S and LaCeO2S occurred in 100-600°C and 100-550°C, mainly occurred in 300-500°C and 220-500°C, with the maximum oxidation rate at 400 and 380°C, respectively. The OSC of the two above was 1.58 molO2/mol and 1.57 molO2/mol, respectively. La2O2S re-oxidation started at 400°C to 1000°C and it had not completed. The OSC of Ce2O2S that tested by the O2-pulse at 400°C was 0.60 molO2/mol, 38% of the total OSC. After incorporating of transition metal Cu, the start temperature of TPR/TPO for CuCeOxSO4/CuCeOxS had decreased.
AB - (La1-x Cex)2O2SO4 (x=0, 0.5, 1) and CuCeOxSO4 were synthesized by a template-assisted route and characterized by means of XRD, FT-IR, BET, TPR, TPO and O2-pulse. The results showed that the reduction temperature of Ce2O2SO4 and LaCeO2SO4 were significantly lower than that of La2O2SO4 in TPR. The reduction temperature range of Ce2O2SO4, LaCeO2SO4 and La2O2SO4 occurred in 550-780°C(mainly in 650-780°C), 600-760°C(mainly in 650-750°C) and 770-930°C, respectively. The hydrogen consumption of Ce2O2SO4 and LaCeO2SO4 reached 4.6 molH2/mol and 4.4 molH2/mol, respectively. The oxidation temperature range of Ce2O2S and LaCeO2S occurred in 100-600°C and 100-550°C, mainly occurred in 300-500°C and 220-500°C, with the maximum oxidation rate at 400 and 380°C, respectively. The OSC of the two above was 1.58 molO2/mol and 1.57 molO2/mol, respectively. La2O2S re-oxidation started at 400°C to 1000°C and it had not completed. The OSC of Ce2O2S that tested by the O2-pulse at 400°C was 0.60 molO2/mol, 38% of the total OSC. After incorporating of transition metal Cu, the start temperature of TPR/TPO for CuCeOxSO4/CuCeOxS had decreased.
KW - O-pulse
KW - Oxygen release/storage property
KW - Oxygen storage capacity
KW - Oxygen storage material
KW - Oxysulfate/oxysulftde
KW - TPR/TPO
UR - http://www.scopus.com/inward/record.url?scp=80053059352&partnerID=8YFLogxK
M3 - 文章
AN - SCOPUS:80053059352
SN - 1001-7631
VL - 27
SP - 262
EP - 268
JO - Huaxue Fanying Gongcheng Yu Gongyi/Chemical Reaction Engineering and Technology
JF - Huaxue Fanying Gongcheng Yu Gongyi/Chemical Reaction Engineering and Technology
IS - 3
ER -