PYROLYSIS OF IMPREGNATED CARBON ADSORBENTS AFTER EXPOSURE TO CYANIDE GASES

被引：11

作者：

EHRBURGER, P ^{[1
]}

DENTZER, J ^{[1
]}

DZIEDZINL, P ^{[1
]}

机构：

[1] CTR ETUD BOUCHET,VERT LE PETIT,FRANCE

来源：

JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS | 1993年 / 24卷 / 03期

关键词：

CHARCOALS; CU-CR COMPOUNDS; CYANIDE GASES; PYROLYSIS;

D O I：

10.1016/0165-2370(93)85011-M

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Activated charcoals impregnated with Cu-Cr compounds were analyzed by temperature-programmed desorption before and after exposure to CNCl or HCN. Qualitative and quantitative determinations of the desorbed species were carried out using mass spectrometry. The chemisorbed cyanide gases led, upon vacuum pyrolysis from 50 to 950-degrees-C, to different types of nitrogen compounds, in particular NH3, N2, NO and HCN, indicating that hydrolysis and oxidation reactions are the main routes of conversion on the carbon adsorbent. For unaged impregnated samples, the prevailing pathway is oxidation of the cyanide gases. After aging in a humid environment, the pyrolysis led mainly to NH3, indicating that hydrolysis is the dominant reaction for the elimination of the toxic gas. Quantitative analysis of the pyrolysis products allows us to establish a kind of fingerprint of the physico-chemical properties of the impregnated carbons after exposure to cyanide gases.

引用

页码：333 / 344

页数：12

共 12 条

[1] AN EXAMINATION OF THE PRODUCTS FORMED ON REACTION OF HYDROGEN-CYANIDE AND CYANOGEN WITH COPPER, CHROMIUM (6+) AND COPPER CHROMIUM (6+) IMPREGNATED ACTIVATED CARBONS [J].