Chlorine gas recovery from polyvinyl chloride

被引：24

作者：

Horikawa, S ^{[1
]}

Takai, Y ^{[1
]}

Ukei, H ^{[1
]}

Azuma, N ^{[1
]}

Ueno, A ^{[1
]}

机构：

[1] Shizuoka Univ, Fac Engn, Dept Mat Sci, Shizuoka 4328561, Japan

来源：

JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS | 1999年 / 51卷 / 1-2期

关键词：

polyvinyl chloride; dehydrochlorination; HCl fixation; Cl-2; recovery; cobalt oxide; pyrolysis;

D O I：

10.1016/S0165-2370(99)00015-7

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Hydrogen chloride, evolved from polyvinyl chloride by heating at 533 K, was fixed by metal oxides at 533-673 K to form the corresponding metal chlorides. The metal chlorides thus formed were calcined at 623-723 K under an oxygen flow in order to recover chlorine gas and to regenerate the metal oxides. Among the metal oxides employed, cobalt oxide was the most effective both for the fixation and release of chloride ions. With the iterative use of cobalt oxide for HCl fixation at 573 K and subsequent Cl-2 release at 673 K, the amount of chloride ions fixed by cobalt oxide powder decreased to one-fifth of those fixed by the fresh cobalt oxide. This is due to the decrease in the BET surface area of cobalt oxide caused by the iterative use. (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：167 / 179

页数：13

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