摘要
随着工农业的迅速发展,人类大规模的固氮活动破坏了自然界氮素循环的平衡。水中硝酸盐氮的污染问题日渐引起人们的关注,去除水中硝酸盐的常规方法都有其难以克服的缺点。双金属催化还原法是一种新型的水脱氮技术,该方法具有反应速率快、生成氮气选择性高、能耗低且易操作等优点。文章在综述双金属催化还原水中硝酸根研究进展的基础上,重点对双金属催化剂性质、反应机理、传质过程、催化剂选择与制备进行了详细阐述,提出有效提高硝酸盐还原速度的同时控制反应发生的方向是该技术的关键;寻求高效、高选择性和稳定性的催化剂,探索多工艺组合及催化剂性能优化是该领域的研究方向。
Activities of nitrogen fixation which people take destroy the balance of natural nitrogen cycle with the development of agriculture and industry.The increase of nitrate concentration in water had stimulated to intensive research on denitrification.The conventional methods of removing nitrate from water exists some disadvantages.The nitrate is reduced into nitrogen on Bimetallic catalysts,which was a new water treatment technology.The method was known to have great potential for rapid reaction,high selectivity of generating nitrogen,low energy consumption,easy operation Etc.On the basis of summarizing the effects and mechanisms of catalytic reduction of nitrate,the influences of key factors such as catalytic properties of catalyst,reaction mechanism,mass transfer,selection and preparation of the catalyst were reviewed in detail in the paper.The key in the process was how to control the reactive direction when improving the reactive velocity.The most important research focus for the catalytic reduction of nitrate was preparing the catalyst with high activity,selectivity and stability,as well as studying the effect of reaction conditions.The study and development tendency was focused on combination technology,as well as the optimization of catalytic performance for catalytic reduction of nitrate.
出处
《广东化工》
CAS
2011年第6期105-107,共3页
Guangdong Chemical Industry
关键词
水污染
双金属催化剂
硝酸盐
反应机理
活性组分
促进组分
载体
制备
water contamination
bimetallic catalysts
nitrate
reaction mechanism
active component
auxiliary component
vector
preparation
