Research progress on anti-poisoning of SCR catalysts in flue gas of coal and renewable fuel co-fired power plant

doi:10.16085/j.issn.1000-6613.2023-0126

Abstract

Abstract:

Under the background of Carbon Peak and Carbon Neutralization, the demand for pollution and carbon reduction of coal-fired units is urgent. Co-fired coupled directly with renewable fuel for power generation can not only reduce carbon emissions, but also significantly improve energy utilization level. However, the characteristics of different fuels lead to complex flue gas characteristics after co-combustion, which poses new challenges to SCR catalysts. The article briefly reviews the reaction mechanism of the SCR catalysts, comprehensively elucidates the influence of boiler flue gas after burning co-fired renewable fuels on the catalytic process of SCR catalyst, and discusses in detail the effects of different poisons on the catalytic activity of SCR catalysts. Then, various anti-poisoning strategies for catalyst design are proposed based on different anti-poisoning researches. This paper also expounds the development trend of anti-poisoning catalysts in the future. To achieve low-carbon economic development of thermal power units, it is necessary to clarify the poisoning effect of co-combustion conditions on catalysts, enhance the adaptability of multi-co-combustion scenarios, and improve the yield and quality of industrial products through process improvement.

Key words: renewable energy, pollutants degradation and carbon dioxide reduction, anti-poisoning, catalysts

摘要：

“双碳”背景下，燃煤机组减污降碳需求迫切，与可再生燃料耦合发电可提高能源利用水平，降低碳排放量，不同燃料的特性导致掺烧后的烟气特征复杂，对脱硝催化剂提出新的挑战。本文简要回顾了脱硝催化剂反应过程机理，综合阐述了掺烧可再生燃料后的锅炉烟气对脱硝催化剂的催化过程影响，并详细讨论了不同中毒元素对脱硝催化剂催化活性的作用影响机制，然后重点综合了现有的不同抗中毒研究，提出了多种催化剂抗中毒设计策略，本文也对未来抗中毒催化剂的发展趋势进行了阐述，应更加明晰掺烧工况对催化剂的中毒影响、增强多掺烧场景可适性，通过工艺改进提高工业产品成品率和质量，最终助力火电机组实现低碳经济发展。

关键词: 再生能源, 减污降碳, 抗中毒, 催化剂

CLC Number:

X701

ZHOU Jiali, MA Ziran, LI Ge, ZHAO Chunlin, WANG Hongyan, WANG Lei. Research progress on anti-poisoning of SCR catalysts in flue gas of coal and renewable fuel co-fired power plant[J]. Chemical Industry and Engineering Progress, 2023, 42(12): 6286-6300.

周佳丽, 马子然, 李歌, 赵春林, 王红妍, 王磊. 燃煤耦合可再生燃料电厂抗中毒脱硝催化剂研究进展[J]. 化工进展, 2023, 42(12): 6286-6300.

Figures/Tables 14

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