氰化氢脱除方法

Removal methods of hydrogen cyanide

氰化氢(HCN)作为聚丙烯腈基炭纤维(PANCF)及其他产业中产生的一种有害气体,其脱除日益受到人们的重视。通过介绍目前用于脱除HCN的几种主要方法(吸收法、吸附法、直接燃烧法和催化燃烧法)的原理、操作条件及适用对象,比较了各种方法的优缺点。结果表明:催化燃烧法由于具有安全性能好,净化效率高,起燃温度低,节省能源,无二次污染,工艺简单,操作方便等优点,对处理PANCF高温炭化与煤高温裂解产生的HCN具有较大的优势。

The removal of hydrogen cyanide, a by-product of PAN carbon fiber production and some other industries, has been paid increased attention. In the present paper, some methods for removing HCN are reviewed, including sorption, adsorption, combustion and catalytic combustion. The principle, operating conditions and application of each method are introduced in detail, and the advantages and disadvantages of each method are compared. It is concluded that catalytic combustion has obvious advantages over the others for HCN formed in the production of PAN carbon fibers and the pyrolysis of coals due to its high removal efficiency, no secondary pollution and low energy consumption. However, further investigation of the performance of catalysts, especially in commercial scale equipment is required.