Zn对工业V-Mo/Ti脱硝催化剂性能的影响

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基金项目:

江苏省科技成果转化专项资金项目(BA2017095)；江苏省博士后科研资助计划(2018K076C)；中国博士后科学基金(2019M651632)

Effect of Zn on Catalytic Performances of Industrial V-Mo/Ti De-NO_x Catalyst

1. Datang Nanjing Environmental Protection Technology Co., Ltd., Nanjing 211111, Jiangsu, China;
2. School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu, China

摘要: 采用浸渍法将不同含量的Zn负载到工业V-Mo/Ti脱硝催化剂上,评价其NH₃选择性催化还原NO的活性。采用XRD、N₂-吸附脱附、NH₃-TPD、H₂-TPR和NO-TPD等,对催化剂进行理化表征。结果表明,Zn的负载,没有改变V-Mo/Ti催化剂的晶型结构,但降低了V-Mo/Ti催化剂的比表面积、还原性能,减少催化剂的酸量,降低了催化剂对NO的吸附性能,从而降低脱硝催化剂的催化剂性能。同时,采用0.5 mol/L的H₂SO₄溶液对Zn中毒的催化剂进行清洗,可以有效去除催化剂上负载的Zn。
- 脱硝催化剂 /
- SCR /
- V-Mo/Ti /
- Zn /
- 吸附性能
Abstract: Different contents of Zn was loaded on V-Mo/Ti catalyst by impregnation method,and the activity of selective catalytic reduction of NO by NH₃ was evaluated.The catalysts were characterized by XRD,N₂ adsorption-desorption,NH₃-TPD,H₂-TPR and NO-TPD.The results show that Zn loading does not change the crystal structure of V-Mo/Ti catalyst,but reduces the specific surface area and reduction performances of V-Mo/Ti catalyst.Furthermore,Zn loading reduces the acid content as well as the NO adsorption performance of the catalyst,decreasing the catalytic denitration performances of the catalyst.With 0.5 mol/L H₂SO₄ solution for washing the Zn poisoned catalyst,the Zn loaded on the catalyst can be effectively removed.
- de-NO_x catalyst /
- SCR /
- V-Mo/Ti /
- Zn /
- adsorption performance