Mn-Nb复合催化剂脱汞性能及抗硫特性试验研究  

Mercury Removal Performance and Resistance to Sulfur Characteristics of Mn-Nb Composite Catalyst

作　　者：唐念[1] 胡将军[2] 盘思伟[1] 叶凯[2] 

机构地区：[1]广东电网公司电力科学研究院环保所,广东广州510080 [2]武汉大学资源与环境科学学院,湖北武汉430079

出　　处：《环境科学与技术》2015年第2期184-188,共5页Environmental Science & Technology

基　　金：南方电网科技项目(K-GD2012-360)

摘　　要：以TiO2为载体制备了Mn-Nb复合催化剂,实验研究了反应温度、HCl浓度对零价汞催化脱除效果的影响,并且研究了催化剂的抗硫特性,在此基础上进行氧化铈改性,提高催化剂的抗硫能力。研究表明,Mn-Nb复合催化剂最佳活性温度为300-350℃,Mn-Nb的负载量对催化脱除效果影响较大,最佳负载量为质量分数7%Mn-2%Nb,此时催化脱汞效率可达90.90%;SO2会抑制催化剂的脱汞活性,经氧化铈改性后,提高了Mn-Nb复合催化剂的抗硫特性,浸渍质量分数1.5%的氧化铈脱汞催化剂的活性最高。Manganese-Niobium（Mn-Nb） composite catalyst was prepared on the carrier of titanium dioxide（TiO2）, effects of reaction temperature and hydrogen chloride （HCl） concentration on the catalytic removal efficiency of zero-valent mercury （Hg^0） were investigated, as well as the resistance to sulfur characteristics of Mn-Nb composite catalyst was studied. Results showed that Mn-Nb composite catalyst achieved the optimum activity at 300-350℃, capacity load of Mn-Nb played a great role on the removal efficiency of Hg^0, which could reach 90.90% at capacity of 7%（w）Mn-2%（w）Nb. Cerium oxide modifying enhanced the resistance to sulfur, which could inhibit activity of mercury removal of Mn-Nb composite catalyst, and it achieved the highest activity after dipping cerium oxide of 1.5%（w）.

关 键 词：MNO2 NB2O5 复合催化剂 氧化铈改性 抗硫特性 

分 类 号：X773[环境科学与工程—环境工程]