P-Based Additive for Reducing Fine Particulate Matter Emissions during Agricultural Biomass Combustion

Zhu, YoujianHuazhong University of Science and Technology, Wuhan, Hubei, China; Zhengzhou University of Light Industry, Zhengzhou, Henan, China (author)

To understand the influence of P-containing compounds on particulate matter (PM) emissions from the combustion of agricultural residues, the combustion of cornstalk was performed with the addition of a phosphorus-based additive, namely, ammonium dihydrogen phosphate (NH4H2PO4), in a fixed-bed combustion system. Simultaneously the ash samples, including PM collected by a Dekati low-pressure impactor (DLPI) and residual ash, were analyzed with variant analytical techniques. It was found that NH4H2PO4 addition significantly reduced PM0.1 and PM0.1-1 yields but increased PM1-10 yields. The maximum PM0.1 and PM1 reduction efficiency can reach up to 50% at an optimal P/K molar ratio equal to 1. Meanwhile, the addition of NH4H2PO4 to cornstalk changed the chemical composition of PM1 from being dominated by KCl and KOH/K2CO3 with a small amount of K2SO4 to a system dominated by KPO3 and KCl with a small amount of K2SO4. Simultaneously, the possible PM1 reduction mechanism was proposed. In addition, the residual ash after combustion was rich in K- and P-containing species, indicating a potential utilization as a fertilizer. It showed that the addition of NH4H2PO4 is a promising approach to reduce PM1 emissions during the combustion of agricultural biomass.

Fan, JiyuanHuazhong University of Science and Technology, Wuhan, Hubei, China (author)
Yang, PengHuazhong University of Science and Technology, Wuhan, Hubei, China (author)
Cheng, WeiHuazhong University of Science and Technology, Wuhan, Hubei, China (author)
Zeng, KuoHuazhong University of Science and Technology, Wuhan, Hubei, China (author)
Zhang, WennanMittuniversitetet,Institutionen för kemiteknik(Swepub:miun)wenzha (author)
Yang, HaipingHuazhong University of Science and Technology, Wuhan, Hubei, China (author)
Shao, JingaiHuazhong University of Science and Technology, Wuhan, Hubei, China; Shenzhen Huazhong University of Science and Technology Research Institute, Shenzhen, Guangdong, China (author)
Wang, XianhuaHuazhong University of Science and Technology, Wuhan, Hubei, China (author)
Chen, HanpingHuazhong University of Science and Technology, Wuhan, Hubei, China (author)
Huazhong University of Science and Technology, Wuhan, Hubei, China; Zhengzhou University of Light Industry, Zhengzhou, Henan, ChinaHuazhong University of Science and Technology, Wuhan, Hubei, China (creator_code:org_t)

In:Energy & Fuels: American Chemical Society (ACS)33:11, s. 11274-112840887-06241520-5029

By the author/editor: Zhu, Youjian; Fan, Jiyuan; Yang, Peng; Cheng, Wei; Zeng, Kuo; Zhang, Wennan; show more...; Yang, Haiping; Shao, Jingai; Wang, Xianhua; Chen, Hanping; show less...

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