Catalytic combustion of methylenechloride

被引:13
作者
Ballikaya, M
Atalay, S
Alpay, HE
Atalay, FS
机构
[1] Department of Chemical Engineering, Ege University, Bornova-Izmir
关键词
catalytic combustion; methylenechloride; monolith;
D O I
10.1080/00102209608935572
中图分类号
O414.1 [热力学];
学科分类号
摘要
The catalytic combustion of methylenechloride, one of the chloromethanes, was investigated on metal oxide catalysts coated on the monolith support or on the spherical alumina pellets. The prepared catalysts were tested at the different temperatures between 200 and 500 degrees C and at varying GHSV values with an excess air of 216%. The catalyst having the composition of 15% Cr2O3, 5% Ce2O3 and 80%gamma-Al2O3 on the monolith was found to be ultimate due to the complete destruction of methylenechloride and to the highest mechanical stability. The operating conditions were proposed as 77778 h(-1) for the GHSV, 216% for the excess air and 400-500 degrees C for the temperature range to combust methylenechloride completely. The dependency of the reaction on methylenechloride and oxygen partial pressures was searched, and it was determined that the rate was strongly dependent on oxygen partial pressure and weakly methylenechloride partial pressure. The reaction rate expression was derived using the mechanism proposed by Downie and the reoxidation and reduction rate constants of the reaction were found as: k(i) = 4.422 x 10(-5)exp(-12597.5/RT) K-0 = 2.901 x 10(-6)exp(-4552.5/RT).
引用
收藏
页码:169 / 184
页数:16
相关论文
共 28 条
[1]  
BALLIKAYA MM, 1995, THESIS EGE U
[2]   DEEP CATALYTIC-OXIDATION KINETICS OF BENZENE-ETHENYLBENZENE MIXTURES [J].
BARRESI, AA ;
BALDI, G .
CHEMICAL ENGINEERING SCIENCE, 1992, 47 (08) :1943-1953
[3]   GAS-PHASE COMPLETE CATALYTIC-OXIDATION OF AROMATIC HYDROCARBON MIXTURES [J].
BARRESI, AA ;
MAZZARINO, I ;
BALDI, G .
CANADIAN JOURNAL OF CHEMICAL ENGINEERING, 1992, 70 (02) :286-293
[4]  
BOND GC, 1975, J APPL CHEM BIOTECHN, V25, P241
[5]   ON THE COMBUSTION OF CHLORINATED HYDROCARBONS .1. TRICHLOROETHYLENE [J].
BOSE, D ;
SENKAN, SM .
COMBUSTION SCIENCE AND TECHNOLOGY, 1983, 35 (1-4) :187-202
[6]  
Fogler H.S., 1986, ELEMENTS CHEM REACTI
[7]  
GREENE HL, 1987, PROCESS IND, P514
[8]   COMBUSTION OF CHLORINATED HYDROCARBONS [J].
GUPTA, AK .
CHEMICAL ENGINEERING COMMUNICATIONS, 1986, 41 (1-6) :1-21
[9]  
HAWTHORN RD, 1974, AICHE S SERIES, P428
[10]   TEMPERATURE EXCURSIONS IN CATALYTIC MONOLITHS [J].
HEGEDUS, LL .
AICHE JOURNAL, 1975, 21 (05) :849-853