燃料化学学报2011，Vol.39Issue(5)：373-377,5.
活性炭催化氧化脱除单质汞的研究
Stabilized oxidation and adsorption of elemental mercury by activated carbon
摘要
Abstract
The catalytic oxidation and adsorption capabilities for elemental mercury (Hg0) on activated carbon (AC) were evaluated in a simulated coal-derived gas containing hydrogen sulfide ( H2S) and oxygen ( O2 ). The Hg0 removal efficiency is close to 78％ in the atmosphere containing H2S and O2 in 180 min at 160 ℃, whereas the retention of mercury without H2S and O2 sharply decreases from 69％ to 28％ in the same duration. Higher adsorption temperature, larger size of sorbent and higher Hg0 concentration may deteriorate to the absorption capability. XRD was used to characterize properties of the sorbents. It shows that mercury sulfide (HgS) is formed over the AC after the adsorption. It is suggested that the oxidation reaction of Hg0 with H2S and O2 may contribute to the efficient capture of Hg0 over AC sorbent. HgS formation is beneficial to improve the Hg0 removal efficiency and the adsorption capacity of the AC sorbent. Furthermore, it has the advantage to reduce the secondary pollution due to HgS being inert and nontoxic to the environment.关键词
催化氧化/单质汞/活性炭Key words
catalytic oxidation/ activated carbon/ elemental mercury分类
环境科学引用本文复制引用
张郃 ,赵建涛,房倚天,王洋..活性炭催化氧化脱除单质汞的研究[J].燃料化学学报,2011,39(5):373-377,5.基金项目
国家自然科学基金(20706055) （20706055）
国家高技术研究发展计划(863计划,2007AA05Z325). （863计划,2007AA05Z325）
