摘要
化学氢解法具有脱卤、脱氮、脱硫、脱芳构化等作用,目前的研究表明该方法对环境中的许多重要污染物都具有还原去除效果,包括卤代化合物、硝基芳香化合物、有机硫化合物、多环芳烃等有机污染物,以及硝酸盐、硫酸盐、氮氧化物、二氧化硫、重金属等无机污染物。为此,本文综述了氢解还原方法降解各类污染物的研究现状,分别介绍了上述各种污染物氢解还原的脱除机理以及影响因素的作用机制,基于绿色化学的要求分析了氢解还原方法的技术优势,从提高氢解效率和节能的角度提出了今后的研究方向。
The chemical hydrogenation possesses the capacity of hydrodehalogenation, hydrodenitrification, hydrodesulfurization, and hydrodearomatization, which has been used environmentally to remove various typical organic or inorganic pollutants in gas or liquid phase. The pollutants treated by hydrogenation mainly include halogenated organic wastes, nitroarenes, organic sulfur compounds, polyeyclic aromatic hydrocarbons, nitrates, sulfates, NOx, S02, and heavy metal ions. So this review presents the wide scale of the hydrogenation applications in the reductive destruction of environmental pollutants studied mainly within past five years. The destruction principles of the above pollutants by hydrogenation are introduced. The effects of the reaction conditions on the reduction efficiency are discussed such as catalysts and supports, hydrogen donors, and pH. The advantages of the reductive destruction for pollutants by hydrogenation are evaluated on the basis of green chemistry practices. Based on the requirements of industrial application, the research trends for the future are proposed in order to further improve hydrogenation efficiency and energy conservation.
出处
《化学进展》
SCIE
CAS
CSCD
北大核心
2009年第1期217-226,共10页
Progress in Chemistry
基金
国家自然科学基金项目(No.20707011
50625823)
中国博士后科学基金(No.20070410069)资助
关键词
化学氢解
还原脱除
环境污染物
chemical hydrogenation
reductive destruction
environmental pollutants
