Catalytic hydrodehalogenation of halon 1211 (CBrClF2) over carbon-supported palladium catalysts

被引：16

作者：

Yu, H ^{[1
]}

Kennedy, EM ^{[1
]}

Uddin, MA ^{[1
]}

Dlugogorski, BZ ^{[1
]}

机构：

[1] Univ Newcastle, Sch Engn, Proc Safety & Environm Protect Grp, Callaghan, NSW 2308, Australia

来源：

APPLIED CATALYSIS B-ENVIRONMENTAL | 2003年 / 44卷 / 03期

基金：

澳大利亚研究理事会;

关键词：

halon; CFC; CBrCIF2; CH2F2; palladium; activated carbon; catalytic hydrodehalogenation;

D O I：

10.1016/S0926-3373(03)00074-2

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The hydrodehalogenation of halon 1211 over Pd/C catalysts was studied over a relatively narrow temperature range, from 453 to 573 K. The main products of the reaction are CH2F2 and CHBrF2 with CHClF2 formed as a minor product. Pd/C catalysts show high initial activities but undergo gradual deactivation before reaching a steady-state activity level. Experimental results suggest that CHBrF2 and CHClF2 are formed via the secondary reaction of CF2 with HBr and HCl. (C) 2003 Elsevier B.V. All rights reserved.

引用

页码：253 / 261

页数：9

共 38 条

[1]

BARNES GR, 1971, J CHEM SOC B, V6, P1176

[2]

Bruice P.Y., 1998, ORGANIC CHEM

[3]

BRUSZEWSKI Z, 1977, POL ROCZNIKI CHEM, V51, P1259

[4] Growth and distribution of halons in the atmosphere [J].

Butler, JH ;

Montzka, SA ;

Clarke, AD ;

Lobert, JM ;

Elkins, JW .

JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 1998, 103 (D1) :1503-1511

[5] Supported palladium catalysts in environmental catalytic technologies for gaseous emissions [J].

Centi, G .

JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL, 2001, 173 (1-2) :287-312

[6] Structure-activity relationships in catalysis by metals: some aspects of particle size, bimetallic and supports effects [J].

Coq, B ;

Figueras, F .

COORDINATION CHEMISTRY REVIEWS, 1998, 178 :1753-1783

[7] CONVERSION UNDER HYDROGEN OF DICHLORODIFLUOROMETHANE OVER SUPPORTED PALLADIUM CATALYSTS [J].

COQ, B ;

COGNION, JM ;

FIGUERAS, F ;

TOURNIGANT, D .

JOURNAL OF CATALYSIS, 1993, 141 (01) :21-33

[8] CONVERSION OF CHLOROBENZENE OVER PALLADIUM AND RHODIUM CATALYSTS OF WIDELY VARYING DISPERSION [J].

COQ, B ;

FERRAT, G ;

FIGUERAS, F .

JOURNAL OF CATALYSIS, 1986, 101 (02) :434-445

[9]

COX RA, 1971, J CHEM SOC B, V8, P1625

[10] Surface study of supported metal catalysts [J].

Czajka, B ;

Kirszensztejn, P .

JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY, 1999, 55 (02) :619-626

← 1 2 3 4 →