Cr对工业V-Mo/Ti脱硝催化剂的毒化作用研究
收稿日期: 2020-10-11
网络出版日期: 2021-08-11
基金资助
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)
Study on deactivation effect of chromium on industrial V-Mo/Ti De-NOx catalyst
Received date: 2020-10-11
Online published: 2021-08-11
采用浸渍法将不同含量的Cr2O3负载在工业V-Mo/Ti脱硝催化剂上,并通过XRD、NH3-TPD、H2-TPR、XPS、N2-吸附脱附、拉曼光谱等手段对催化剂进行表征分析。使用固定床微型反应评价装置对不同催化剂进行了脱硝性能检测。结果表明：工业V-Mo/Ti脱硝催化剂上负载Cr2O3,对催化剂的孔结构影响较小;V-Mo-Cr/Ti催化剂与V-Mo/Ti催化剂相比具备更多的表面酸量。但由于受Cr2O3的影响,催化剂的还原性能较低,化学吸附氧含量较少。与V-Mo/Ti催化剂相比,V-Mo-Cr/Ti催化剂在250~430 ℃温度区间内的脱硝效率较低,N2O生成量较多。
黄力 , 王虎 , 纵宇浩 , 常峥峰 , 刘洋 , 李金珂 , 韩沛 . Cr对工业V-Mo/Ti脱硝催化剂的毒化作用研究[J]. 无机盐工业, 2021 , 53(8) : 112 -116 . DOI: 10.19964/j.issn.1006-4990.2020-0543
Industrial V-Mo-Cr/Ti catalysts loaded with different amounts of Cr2O3 were prepared by impregnation method.XRD,N2-adsorption,NH3-TPD,Raman,H2-TPR and XPS were used to characterize the catalysts.Afterwards,the denitri-fication performance of the different catalysts was tested through a fixed-bed microreactor.It was found that Cr2O3 loaded on industrial V-Mo/Ti denitration catalysts had little impact on the pore properties of catalyst.By comparison with V-Mo/Ti cat-alyst,V-Mo-Cr/Ti catalyst presented more amount of acid sites.However,due to the influence of Cr2O3,the reduction perfor-mance of the catalyst was lower and the content of chemical adsorbed oxygen was less.V-Mo-Cr/Ti catalysts exhibited relative lower NOx conversion and higher N2O generation in the temperature range of 250 ℃ to 430 ℃ than that of the V-Mo/Ti cata-lyst.
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