TY - JOUR
T1 - Catalytic Removal of Benzene at Mild Temperature over Manganese Oxide Catalysts
AU - Guo, Hao
AU - Zhang, Zhixiang
AU - Hojo, Hajime
AU - Chen, Mingxia
AU - Einaga, Hisahiro
AU - Shangguan, Wenfeng
N1 - Funding Information:
This work was financially supported by the National Key Research & Development Plan (2017YFC0211804).
PY - 2019/9/15
Y1 - 2019/9/15
N2 - Series of MnOx catalysts were synthesized through oxalate route and calcined at facile temperatures. Characterizations through XRD, N2-adsorption/desorption, HRTEM, C6H6-TPD, O2-TPD, XPS, and H2-TPR revealed that MnOx calcined at 250 °C (N250) with a main crystal phase of Mn2O3 showed micro-mesopores and largest specific surface area, and therefore had a high adsorption capacity of C6H6. N250 also presented better oxygen mobility, rich surface adsorbed oxygen species (Oads), and proper ratio of surface Mn4+/Mn3+. The starting temperature of H2-TPR of N250 was the lowest among the obtained MnOx samples. As a result, N250 exhibited the lowest T90 value of 191 °C in C6H6 thermal catalytic oxidation (WHSV 60,000 mL gcat.−1 h−1, initial C6H6 concentration 190 ppm) among all the catalysts, and this T90 value is lower than those reported in many research. At last, a potential reaction pathway was proposed according to the results of in-situ FTIR measurement.
AB - Series of MnOx catalysts were synthesized through oxalate route and calcined at facile temperatures. Characterizations through XRD, N2-adsorption/desorption, HRTEM, C6H6-TPD, O2-TPD, XPS, and H2-TPR revealed that MnOx calcined at 250 °C (N250) with a main crystal phase of Mn2O3 showed micro-mesopores and largest specific surface area, and therefore had a high adsorption capacity of C6H6. N250 also presented better oxygen mobility, rich surface adsorbed oxygen species (Oads), and proper ratio of surface Mn4+/Mn3+. The starting temperature of H2-TPR of N250 was the lowest among the obtained MnOx samples. As a result, N250 exhibited the lowest T90 value of 191 °C in C6H6 thermal catalytic oxidation (WHSV 60,000 mL gcat.−1 h−1, initial C6H6 concentration 190 ppm) among all the catalysts, and this T90 value is lower than those reported in many research. At last, a potential reaction pathway was proposed according to the results of in-situ FTIR measurement.
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U2 - 10.1007/s10563-019-09268-2
DO - 10.1007/s10563-019-09268-2
M3 - Article
AN - SCOPUS:85061725034
VL - 23
SP - 199
EP - 209
JO - Catalysis Surveys from Asia
JF - Catalysis Surveys from Asia
SN - 1571-1013
IS - 3
ER -