摘要
密闭电石炉尾气含有大量CO,可用于合成各种化工原料,通常采用变压吸附的方法进行提纯。提纯后的尾气仍含有较大量的氮气、氢气及其它燃料气体,可以实现资源再利用的目的,其中以合成氨较为普遍。密闭电石炉尾气中含有的大量杂质气体和烟尘,不仅会对环境和人类健康构成威胁,还会使工艺中的催化剂中毒,加大尾气综合利用的难度。简要阐述了密闭电石炉尾气的净化及综合利用的现状,对合成氨的方法进行了较为深入的探讨,相比于高温合成技术,低温合成技术具有节约能耗、无二次污染等优点,在合成氨领域具有较为广阔的发展前景。但低温合成技术仍处于探索阶段,其合成的机理还有待进一步完善。
Sealed calcium carbide furnace exhaust gas contains a lot of CO which can be used for the synthesis of various chemical raw materials,usually after using pressure swing adsorption method for purification.But the purified exhaust gas still contains a lot of nitrogen,hydrogen and other fuel gas,which can still achieve the purpose of resource recycling,such as the synthesis of ammonia is rather common.However,the sealed calcium carbide furnace exhaust gas contains a lot of impurities in the gas and soot,this not only will pose a threat to the environment and human health,but also will cause catalyst poisoning in the process and increase the difficulty of comprehensive utilization of exhaust gas.This paper briefly describes the purification and comprehensive utilization of the tailgas of the sealed calcium carbide furnace.The method of ammonia synthesis is discussed in detail.Compared with the high temperature synthesis technology,the low temperature synthesis technology has the advantages of saving energy consumption and no secondary pollution.Ammonia synthesis has broad development prospects.However,low-temperature synthesis technology is still in the exploratory stage,and its mechanism has yet to be further explored.
出处
《化学世界》
CAS
CSCD
2017年第7期442-448,共7页
Chemical World
关键词
密闭电石炉尾气
深度净化
合成氨技术
综合利用
sealed calcium-carbide furnace tail gas
purification methods
ammonia synthesis technology
comprehensive utilization
