低阶煤一步法制备活性炭的脱硫脱硝性能

doi:10.13228/j.boyuan.issn0449-749x.20210340

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Abstract Activated carbon method is a flue gas treatment technology that can realize comprehensive control of multiple pollutants,such as sulfur dioxide and nitrogen oxides generated in the sintering process. However,its popularization and application in sintering flue gas multi-pollutant purification field are limited because of its high production and use costs. Based on the coupling effect among pyrolysis of low-rank coal,gasification reaction of semi-coke and reduction of iron oxides,the low-stage coalification and activation were completed through a one-step method which using low-rank coals as carbon resource and oxidized pellets as activating agent,and the activated carbon (SF AC) was manufactured. Furthermore,the proximate analysis,specific surface area,iodine adsorption value,desulfurization and denitrification performance as well as regeneration performance of activated carbon were also conducted for comparison with those of the commercial activated carbon (ZJ AC). The results show that the desulfurization breakthrough capacities of SF AC and ZJ AC in separate desulfurization are 368.11 mg/g and 73.58 mg/g,respectively. And the denitration breakthrough capacities in separate denitration are 250.39 mg/gand 14.99 mg/g,respectively. The SF AC with iodine adsorption value of 695.13 mg/g and specific surface area of 370.42 m²/g has a better adsorption property than the ZJ AC with iodine adsorption value of 530.54 mg/g and specific surface area of 157.50 m²/g. In addition,the desulfurization and denitrification performance of regenerated ZJ AC and SF AC both show a decrease tendency,while the regenerated SF AC still has a better desulfurization and denitrification performance than that of regenerated ZJ AC. Compared with the separation process of desulfurization and denitrification,process of simultaneous desulfurization and denitrification will cause an increased desulfurization property and decreased denitrification property. The adverse effects can be improved by catalytic reduction of NH₃ under low temperature.

Key words： low-rank coal oxidized pellet activated carbon desulfurization and denitrification sintering flue gas

Received: 02 June 2021

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	Articles by authors
	PAN Jian
	MA Wen-zhuo
	ZHU De-qing
	TIAN Hong-yu
	YANG Cong-cong
	WANG Ying-yu

Cite this article:

PAN Jian,MA Wen-zhuo,ZHU De-qing等. Desulfurization and denitrification performance of activated carbon prepared by one-step method from low-rank coal[J]. Iron and Steel, 2021, 56(12): 142-152.

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http://www.chinamet.cn/Jweb_gt/EN/10.13228/j.boyuan.issn0449-749x.20210340 OR http://www.chinamet.cn/Jweb_gt/EN/Y2021/V56/I12/142

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