MnOx/TiO2低温脱硝催化剂优选及其性能分析

doi:10.11930/j.issn.1004-9649.2013.7.138.4

中国电力 ›› 2013, Vol. 46 ›› Issue (7): 138-142.DOI: 10.11930/j.issn.1004-9649.2013.7.138.4

MnO_x/TiO₂低温脱硝催化剂优选及其性能分析

许悠佳^{1, 2}

1. 神华国华舟山发电有限责任公司,浙江舟山 316012; 2. 复旦大学环境科学与工程系,上海 200433

收稿日期:2013-02-25 出版日期:2013-07-23 发布日期:2015-12-10
作者简介:许悠佳（1982—）,女,浙江定海人,工程硕士,工程师,从事电厂环境工程管理和研究。

Optimal Selection and Performance Analysis of MnO₂/TiO₂ for Low-Temperature De-NO_x

XU You-jia^{1, 2}

1. Shenhua Guohua Zhoushan Power Generation Cooperation, Zhoushan 316012, China; 2. Department of Environmental Science and Engineering, Fudan University, Shanghai 200433, China

Received:2013-02-25 Online:2013-07-23 Published:2015-12-10

摘要/Abstract

摘要： 在模拟固定源烟气排放特征的环境下,分别研制比较了2种非负载型和1种负载型锰基催化剂的低温脱硝性能,初步筛选出低温活性较高的催化剂α-MnO₂/TiO₂,并对其抗水蒸气（H₂O）和抗SO₂性能进行了研究。试验结果表明,在无H₂O和无SO₂环境中,温度为150~200 ℃时,非负载型催化剂MnO_x和负载型催化剂MnO_x/TiO₂的催化活性均较高,NO_x转化率接近100%;但MnO_x/TiO₂催化剂低温时对H₂O与SO₂的耐受性差,特别是SO₂和H₂O同时加入时,催化活性将降至22%。低温脱硝工艺的工业化推广还存在诸多局限性,需进一步研究低温脱硝催化剂的抗H₂O和抗SO₂性能。

关键词: MnOx/ TiO2催化剂, 选择性催化还原, 火电厂, 环保, 低温脱硝

Abstract: Under the simulated emission conditions of certain stationary source, two kinds of unsupported and one supported MnO_x catalysts were prepared and their performances on low-temperature de-NO_x were compared respectively. One catalyst named α-MnO₂/TiO₂ with high catalytic activity in low temperature was filtered out first, and then, the performance of the catalyst in the presence of H₂O and SO₂ was measured. The results show that in the environment with no H₂O or SO₂, the unsupported catalysts MnO_x and the supported catalysts MnO_x/TiO₂ all have high reactivity at temperatures between 150 ℃ and 200 ℃ with the NO_x conversion rate close to 100%. However, the performance of the MnO_x/TiO₂ catalysts deteriorates in the presence of H₂O or SO₂; especially when H₂O and SO₂ are added together, the catalytic activity drops to 22%. Therefore, there are still many limitations to the popularization of the low-temperature de-NO_x technology. Further studies are needed onthe resistance to H₂O and SO₂ in low-temperature selective catalytic reduction (SCR).

Key words: MnOx/TiO2 catalyst, selective catalytic reduction, thermal power plant, de-NOx in low temperature

中图分类号:

TK22

许悠佳. MnO_x/TiO₂低温脱硝催化剂优选及其性能分析[J]. 中国电力, 2013, 46(7): 138-142.

XU You-jia. Optimal Selection and Performance Analysis of MnO₂/TiO₂ for Low-Temperature De-NO_x[J]. Electric Power, 2013, 46(7): 138-142.

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MnO_x/TiO₂低温脱硝催化剂优选及其性能分析

Optimal Selection and Performance Analysis of MnO₂/TiO₂ for Low-Temperature De-NO_x

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