[Synergetic effects of silicon carbide and molecular sieve loaded catalyst on microwave assisted catalytic oxidation of toluene].
Molecular sieve loaded catalyst was prepared by impregnation method, microwave-absorbing material silicon carbide and the catalyst were investigated for catalytic oxidation of toluene by microwave irradiation. Research work examined effects of silicon carbide and molecular sieve loading Cu-V catalyst's mixture ratio as well as mixed approach changes on degradation of toluene, and characteristics of catalyst were measured through scanning electron microscope, specific surface area test and X-ray diffraction analysis. The result showed that the fixed bed reactor had advantages of both thermal storage property and low-temperature catalytic oxidation when 20% silicon carbide was filled at the bottom of the reactor, and this could effectively improve the utilization of microwave energy as well as catalytic oxidation efficiency of toluene. Under microwave power of 75 W and 47 W, complete-combustion temperatures of molecular sieve loaded Cu-V catalyst and Cu-V-Ce catalyst to toluene were 325 degrees C and 160 degrees C, respectively. Characteristics of the catalysts showed that mixture of rare-earth element Ce increased the dispersion of active components in the surface of catalyst, micropore structure of catalyst effectively guaranteed high adsorption capacity for toluene, while amorphous phase of Cu and V oxides increased the activity of catalyst greatly.
School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China. wxhwq526088@163.com
Xiao-Hui
XH
Wang
Long-Li
LL
Bo
Hai-Nan
HN
Liu
Hao
H
Zhang
Jian-Yu
JY
Sun
Li
L
Yang
Li-Dong
LD
Cai
D000393:Air Pollutants / Q000737:chemistry / Q000302:isolation & purification*; D000397:Air Pollution / Q000517:prevention & control*; D017554:Carbon Compounds, Inorganic / Q000737:chemistry*; D002384:Catalysis; D002850:Chromatography, Gel; D008872:Microwaves; D010084:Oxidation-Reduction; D017655:Silicon Compounds / Q000737:chemistry*; D014050:Toluene / Q000737:chemistry / Q000302:isolation & purification*
D000393:Air Pollutants; D017554:Carbon Compounds, Inorganic; D017655:Silicon Compounds; D014050:Toluene; C022088:silicon carbide