Page 117 - 精细化工2019年第9期
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第 36 卷第 9 期                             精   细   化   工                                  Vol.36, No.9
             201 9 年 9 月                             FINE CHEMICALS                                 Sept.    2019


              催化与分离提纯技术
                       Cu(x)/TiO 催化剂 NH -SCR 低温脱硝性能
                                         2
                                                              3

                                           1
                                                        1
                    刘晓刚      1,2 ,费浩天 ,刘奕绮 ,迟姚玲                      1,2* ,孙巾茹      1,2 ,王   虹    1,2*
                 (1.  北京石油化工学院  化学工程学院,北京    102617;2.  燃料清洁化及高效催化减排技术北京市重点实
                 验室,北京    102617)

                 摘要:以硝酸铜和二氧化钛为原料,采用浸渍法制备 Cu(x)/TiO 2 (x 为以 TiO 2 载体质量为基准的铜负载量,下

                 同)催化剂。运用 XRD、XPS、NO-TPD、H 2 -TPR 等对催化剂进行了表征,在微型固定床反应器中评价了 Cu(x)/TiO 2
                 催化剂在以 NH 3 为还原剂的选择性催化还原 NO 反应(NH 3 -SCR)中的脱硝活性。结果表明,铜物种以 Cu 2 O
                 和 CuO 的形式共存于 TiO 2 载体上;铜负载量影响催化剂的脱硝性能;Cu(6)/TiO 2 催化剂(6 代表铜的负载量为
                 6%)表现出较好的氧化还原性和对反应物 NO 的吸附-脱附能力,低温脱硝活性较好,NO 转化率达到 85%和 95%
                 时对应反应温度 T 85 和 T 95 分别为 195 和 218  ℃,NO 转化率大于 95%的活性窗口温度为 218~270  ℃,宽度为
                 52  ℃。
                 关键词:铜;二氧化钛;一氧化氮;脱硝;催化技术
                 中图分类号:X701;TQ426      文献标识码:A      文章编号:1003-5214 (2019) 09-1845-05


                      Denitrification Performance of Cu(x)/TiO 2 Catalysts for Selective
                          Catalytic Reduction of NO with NH 3 at Low Temperature


                                                                                     1,2
                                                         1
                                 1,2
                                               1
                   LIU Xiao-gang , FEI Hao-tian , LIU Yi-qi , CHI Yao-ling 1,2* , SUN Jin-ru , WANG Hong 1,2*
                 (1. College of Chemical Engineering, Beijing Institute of Petrochemical Technology, Beijing 102617, China; 2. Beijing
                  Key Laboratory of Fuels Cleaning and Advanced Catalytic Emission Reduction Technology, Beijing 102617, China)
                 Abstract: Cu(x)/TiO 2 (x is the amount of copper loading based on the mass of TiO 2 carrier, the same below)
                 catalysts  were  prepared  by  impregnation  method  using  copper  nitrate  and  TiO 2  as  raw  materials.  The
                 catalysts were characterized by XRD, XPS, NO-TPD and H 2-TPR. The performance of the catalysts for the
                 selective catalytic reduction of NO with NH 3 (NH 3-SCR) was evaluated in a fixed-bed micro-reactor. The
                 results  showed  that  copper  species  existed  in  the  form  of  Cu 2O  and  CuO  on  the  TiO 2  carrier.  The
                 denitrification  performance  of  catalysts  was  affected  by  the  amount  of  copper  loading.  The  Cu(6)/TiO 2
                 catalyst(6  means  the  dosage  of  Cu  is  6%)  exhibited  excellent  redox  properties  and  good  adsorption/
                 desorption performance for reactants, which showed a good catalytic activity in denitrification reaction even
                 at low-temperature.When the conversion of NO reached 85% and 95%, the reaction temperature T 85 and T 95
                 were 195  ℃  and 218  ℃, respectively. The temperature range for the NO conversion over 95% was from
                 218  ℃  to 270  ℃  with a width of 52  ℃.
                 Key words: Cu; TiO 2; NO; denitrification; catalysis technology


                 氮氧化物(NO x )是大气主要污染物之一,主                       人类健康,如何控制 NO x 排放成为近年来全世界环
                                                                               [1]
            要来源于火电厂和工业烟气。NO x 会产生光化学烟                          境领域的研究热点 。国务院印发的《“十三五”节
            雾,造成酸雨,破坏臭氧层,破坏生态环境,危害                             能减排综合工作方案》明确了“十三五”期间节能


                 收稿日期:2018-12-13;  定用日期:2019-04-25; DOI: 10.13550/j.jxhg.20180918
                 基金项目:国家自然科学基金(U1662103,21673290);燃料清洁化及高效催化减排技术北京市重点实验室资助项目(BZ041420180007);
                 北京市大学生创新创业训练计划(2018J00035)
                 作者简介:刘晓刚(1992—),男,硕士生。联系人:迟姚玲(1976—),女,副教授,E-mail:chiyaoling@bipt.edu.cn;王   虹(1964
                 —),女,教授,电话:010-81292131,E-mail:wanghong@bipt.edu.cn。
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