V2O5-MoO3/TiO2催化滤袋的制备及中试应用

doi:10.11949/0438-1157.20210822

化工学报 ›› 2021, Vol. 72 ›› Issue (11): 5598-5606.DOI: 10.11949/0438-1157.20210822

• 催化、动力学与反应器 • 上一篇下一篇

V₂O₅-MoO₃/TiO₂催化滤袋的制备及中试应用

史玉婷^1,²(),皇甫林²,李长明³,王月⁴,高士秋²,伞晓广¹,韩振南¹,余剑²()

^1.沈阳化工大学化学工程学院，辽宁沈阳 110142
^2.中国科学院过程工程研究所多相复杂系统国家重点实验室，北京 100190
^3.北京工商大学生态环境学院，北京 100048
^4.浙江佰誉智能技术有限公司，浙江衢州 324000

收稿日期:2021-06-21 修回日期:2021-08-30 出版日期:2021-11-05 发布日期:2021-11-12
通讯作者: 余剑
作者简介:史玉婷（1995—），女，硕士研究生，shiyuting1107@163.com
基金资助:
国家重点研发计划项目(2019YFE0197200)

Preparation and pilot-scale test of V₂O₅-MoO₃/TiO₂ catalytic filter bag

Yuting SHI^1,²(),Lin HUANGFU²,Changming LI³,Yue WANG⁴,Shiqiu GAO²,Xiaoguang SAN¹,Zhennan HAN¹,Jian YU²()

^1.College of Chemical Engineering, Shenyang University of Chemical Technology, Shenyang 110142, Liaoning, China
^2.State Key Laboratory of Multi-phase Complex System, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
^3.School of Ecology and Environment, Beijing Technology and Business University, Beijing 100048, China
^4.Zhejiang Baiyu Intelligent Technology Co. , Ltd. , Quzhou 324000, Zhejiang, China

Received:2021-06-21 Revised:2021-08-30 Online:2021-11-05 Published:2021-11-12
Contact: Jian YU

摘要/Abstract

摘要：

为解决现有Mn基催化滤袋SO₂中毒的问题，制备了基于V₂O₅-MoO₃/TiO₂的催化滤袋，用于在180~260℃范围内同时去除NO_x和粉尘。实验结果表明，双层滤袋在气体过滤面速度为0.2 m/min时具有良好的脱硝活性和抗硫抗水性能。在纯氧玻璃窑炉中试中采用制备的双层催化滤袋进行了试验，烟气量为2000~3000 m³/h、SO₂浓度在20~30 mg/m³范围内、水蒸气含量10%（体积分数）、NO_x浓度为400~550 mg/m³，在170~210℃范围内NO_x转化率可达到88.14%~95.06%，验证了催化滤袋的脱硝性能；连续运行1500 h后，活性出现5%左右的微弱衰减；在高硫烟气条件下（300~500 mg/m³）连续运行100 h发现催化滤袋失活，SEM-EDS和XPS表征证明催化剂失活是由于硫铵类物质在滤袋纤维表面沉积，部分活性位点被覆盖所致。

关键词: V₂O₅-MoO₃/TiO₂, 催化滤袋, 选择性催化还原, 抗硫抗水, 中试应用

Abstract:

In order to solve the SO₂ poisoning problem of the existing Mn-based catalytic filter bags, a catalytic filter bag based on V₂O₅-MoO₃/TiO₂ was prepared for the simultaneous removal of NO_x and dust in the range of 180—260℃. The experimental results displayed that the double-layer filter bags had excellent denitration activity and SO₂/H₂O-resistant stability when the gas filter surface velocity was 0.2 m/min. The double-layer catalytic filter bags were used in the pilot-scale test of pure oxygen glass kiln, when the flue gas volume was about 2000—3000 m³/h, SO₂ concentration in the range of 20—30 mg/m³, the water vapor content was 10%(vol) and NO_x concentration in the range of 400—550 mg/m³, the NO_x conversion reached 88.14%—95.06% from 170℃ to 210℃, and the good denitration performance of catalytic filter bags had been verified. After 1500 h of continuous operation, the activity showed a slight decay of about 5%. Under high-sulfur flue gas conditions (300—500 mg/m³) for 100 h continuous operation, the catalytic filter bag was found to be deactivated. SEM-EDS and XPS characterizations proved that the catalyst deactivation was due to the deposition of ammonium sulfate on the surface of the filter bag fiber and the part of active site is covered.

Key words: V₂O₅-MoO₃/TiO₂, catalytic filter bag, SCR, SO₂/H₂O resistant, pilot-scale test

中图分类号:

X 511

史玉婷, 皇甫林, 李长明, 王月, 高士秋, 伞晓广, 韩振南, 余剑. V₂O₅-MoO₃/TiO₂催化滤袋的制备及中试应用[J]. 化工学报, 2021, 72(11): 5598-5606.

Yuting SHI, Lin HUANGFU, Changming LI, Yue WANG, Shiqiu GAO, Xiaoguang SAN, Zhennan HAN, Jian YU. Preparation and pilot-scale test of V₂O₅-MoO₃/TiO₂ catalytic filter bag[J]. CIESC Journal, 2021, 72(11): 5598-5606.

图/表 11

图1 烟气净化中试工艺流程

Fig.1 Pilot-scale test process flow chart of flue gas purification

图2 不同配方颗粒催化剂的脱硝性能

Fig.2 The denitration performance of granular catalysts with different formulations

图3 V10Mo10颗粒催化剂的表征结果

Fig.3 Characterization of V10Mo10 granular catalyst

图4 不同过滤面速度下的滤袋脱硝性能

Fig.4 Denitrification performance of filter bags at different filtration velocity on catalytic performance

图5 不同层数滤袋的脱硝性能

Fig.5 Denitrification performance of filter bags with different layers

图6 双层滤袋的抗硫抗水性能

Fig.6 SO2/H2O-resistant stability of double layer filter bags

图7 催化滤袋的中试应用性能

Fig.7 Pilot-scale test denitrification performance of catalytic filter bags

图8 不同催化滤袋的SEM-EDS图

Fig.8 SEM-EDS images of different catalytic filter bags

表1 不同催化滤袋的EDS元素含量

Table 1 The percentage of EDS elements in different catalytic filter bags

样品	Content/%(mass)
样品	C	O	F	S	V
新鲜-内侧	17.26	6.81	57.94	0.49	4.43
1500 h-外侧	13.17	30.37	20.33	12.59	1.13
1500 h-内侧	15.22	18.34	42.17	2.64	4.34
失活-外侧	12.37	47.59	8.20	31.18	0.66
失活-内侧	16.96	15.86	43.72	7.60	1.69

图9 新鲜滤袋和失活滤袋的脱硝性能对比

Fig.9 Comparison of denitrification performance between fresh filter bag and deactivated filter bag

图10 新鲜滤袋和失活滤袋的XPS光谱

Fig.10 XPS spectrum of fresh and deactivated filter bags

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V₂O₅-MoO₃/TiO₂催化滤袋的制备及中试应用

Preparation and pilot-scale test of V₂O₅-MoO₃/TiO₂ catalytic filter bag

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