中北大学学报（自然科学版）2016，Vol.37Issue(6)：625-632,8.DOI:10.3969/j.issn.1673-3193.2016.06.013
基于氨基多羧酸螯合铁催化氧化硫化氢技术的研究进展
Study on Catalyst Oxidetion H2 S with Aminopolycarboxylic Chelating Iron
摘要
Abstract
Gas desulfurization processes based on iron chelate chemistry as a catalytic oxidization technol-ogy for the removal of H2 S in energy processing industries has received increasing attention.Complex chemistry,mechanism and dynamics of desulfurization processes based on iron chelate are reviewed in recent 30 years.Firstly,an unexpected result of this study is that favorable redox reactions are associat-ed with conditional constants that vary over a wide range of numerical values,ligands that form suitable iron complexes as catalysts have oxygen donors.Then,it is the hydroxyl radical that has ability to oxi-dation Fe(Ⅲ)chelates whereas ferryl has not.It is seen that pH has significant impact on the ferric che-late complexs on the reactive absorption rate of H2 S,and the phenomenon of increasing reactivity of fer-ric chelates with hydroxylation is shown too.The observation indicates that pH,the number and struc-ture of coordinating groups on chelates are related to the difference of intermediate reactivity.Further-more,the intermediates and products of the oxidative degradation of each chelating agent are described and compared.During the reoxidation of the ferrous formed and which in turn generates the hydroxyl radical by reaction with ferrous ion.The site of oxidative attack by the hydroxyl radical on these ligands seems to be the -CH2- groups a to the carboxylate groups,as well as the -CH2- groups in the eth-ylene bridges between the nitrogen.Lastly,the current problems as well as the corresponding research directions are discussed.关键词
螯合铁/氧化还原/硫化氢/催化氧化/降解Key words
iron chelates/redox/hydrogen sulfide/redox catalysts/degradation分类
化学化工引用本文复制引用
张世光,罗莹,郭芳..基于氨基多羧酸螯合铁催化氧化硫化氢技术的研究进展[J].中北大学学报（自然科学版）,2016,37(6):625-632,8.基金项目
国家自然科学基金资助项目(21376229) （21376229）
