杨晓刚^1,,
马强¹,
牛国平¹,
徐晓涛¹
1.西安热工研究院有限公司，西安 710054
基金项目: 2017年陕西省博士后科研基金资助项目（2017BSHQYXMZZ09）

Effect of fast SCR reaction on denitration characteristics of commercial V2O5-WO3/TiO2 catalysts

YANG Xiaogang^1,,
MA Qiang¹,
NIU Guoping¹,
XU Xiaotao¹
1.Xi’an Thermal Power Research Institute Co. Ltd., Xi’an 710054, China

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摘要:通过实验考察了快速SCR反应对商用V2O5-WO3/TiO2催化剂脱硝特性的影响。在250～375 ℃的实验温度区间内，快速SCR反应能适应更宽的温度窗口而保持较高的效率；快速SCR反应在高空间速度（SV=12 400 h-1）的脱硝效率甚至要高于标准SCR反应在低空间速度（SV=7 400 h-1）时的脱硝效率；快速SCR反应在410～820 mg·m-3的NOx质量浓度内脱硝效率波动不大。通过快速SCR反应和标准SCR反应条件下的催化剂活性分析和体积量计算，快速SCR反应相较标准SCR反应可以提高活性1.4倍，减少催化剂用量28.57%，同时通过催化剂寿命计算，快速SCR反应可以延长现有SCR脱硝系统V2O5-WO3/TiO2催化剂寿命22 582 h，延长催化剂的更换周期941 d。
关键词: 快速SCR反应/
空间速度/
NOx浓度/
活性/
催化剂寿命

Abstract:The effects of fast SCR reaction on the denitration performance of commercial V2O5-WO3/TiO2 catalysts were investigated experimentally. In the experimental temperature range of 250 to 375 ℃, fast SCR reaction can adapt to wider temperature window and maintain high efficiency. The denitration efficiency of the fast SCR reaction at the high space velocity (SV = 12 400 h-1) is even higher than that of the standard SCR reaction at the low space velocity (SV = 7 400 h-1). The denitration efficiency of the fast SCR reaction fluctuates little in the range of 410 to 820 mg·m-3 NOx concentration. Through the catalyst activity analysis and the amount of catalyst under the condition of fast SCR reaction and standard SCR reaction, the activity of fast SCR reaction is 1.4 times higher than that of standard SCR reaction, and the amount of catalyst is reduced by 28.57%. The fast SCR reaction can prolong the service life of the existing SCR denitrification system V2O5-WO3/TiO2 catalyst for 22 582 h, and prolong the replacement period of the catalyst for 941 d.
Key words:fast SCR reaction/
space velocity/
NOx concentration/
activity/
catalyst life.

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快速SCR反应对商用V2O5-WO3/TiO2催化剂脱硝特性的影响

杨晓刚^1,,
马强¹,
牛国平¹,
徐晓涛¹
1.西安热工研究院有限公司，西安 710054
基金项目: 2017年陕西省博士后科研基金资助项目（2017BSHQYXMZZ09）
关键词: 快速SCR反应/
空间速度/
NOx浓度/
活性/
催化剂寿命
摘要:通过实验考察了快速SCR反应对商用V2O5-WO3/TiO2催化剂脱硝特性的影响。在250～375 ℃的实验温度区间内，快速SCR反应能适应更宽的温度窗口而保持较高的效率；快速SCR反应在高空间速度（SV=12 400 h-1）的脱硝效率甚至要高于标准SCR反应在低空间速度（SV=7 400 h-1）时的脱硝效率；快速SCR反应在410～820 mg·m-3的NOx质量浓度内脱硝效率波动不大。通过快速SCR反应和标准SCR反应条件下的催化剂活性分析和体积量计算，快速SCR反应相较标准SCR反应可以提高活性1.4倍，减少催化剂用量28.57%，同时通过催化剂寿命计算，快速SCR反应可以延长现有SCR脱硝系统V2O5-WO3/TiO2催化剂寿命22 582 h，延长催化剂的更换周期941 d。

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