磷酸对过氧化氢氧化脱除高硫煤泥中硫的影响

doi:10.19286/j.cnki.cci.2022.09.040

Abstract
Figure/Table
References (18)
Related Citation (8)

Download: PDF (0 KB) HTML (1 KB)
Export: BibTeX | EndNote (RIS)

Abstract

In order to improve the removal effect of H2O2 on sulfur in coal, inorganic acid assisted H2O2 oxidation method was used to remove sulfur from a high sulfur peat in Shanxi Province, the effects of acid types and H3PO4 concentration on desulfurization rate was studied, and the coal samples before and after oxidation were analyzed and characterized by infrared spectroscopy, X-ray diffraction and scanning electron microscope. The results show that acid can improve the oxidative and desulfurization effect of H2O2, among which the strengthening effect of H3PO4 is the best, followed by H2SO4, and the effect of HCl and HNO3 are not obvious. When the concentration of H3PO4 was 0.05 mol/L, the liquid-solid ratio of 20% H2O2 was 10∶1, and reaction time was 2 h, compared with pure H2O2 oxidation , the removal rates of total sulfur and organic sulfur were increased by about 25.8% and 107.1%, respectively. This is because H3PO4 can complexate with Fe2+ and Fe3+ to generate Fe2(PO4)3 and FePO4 precipitation, which the oxidation of H2O2 and FeS2 is promoted, the dissolution of minerals is accelerated, and the mass transfer resistance is reduced. However, when the concentration of H3PO4 is too high, the desulfurization rate decreases instead.

Key words： hydrogen peroxide coal oxidation desulfurization phosphoric acid synergistic effect

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	Li Yuhan
	Sun Ao
	Diao Zhongxiu
	Wei Fengyu

Cite this article:

Li Yuhan,Sun Ao,Diao Zhongxiu等. Effect of phosphoric acid on oxidative removal of sulfur from high sulfur coal slime by hydrogen peroxide[J]. CCI, 2022, 45(9): 151-155.

URL:

http://www.mtyhg.com.cn/EN/10.19286/j.cnki.cci.2022.09.040 OR http://www.mtyhg.com.cn/EN/Y2022/V45/I9/151

1 ]       Jaiswal S, Tripathy S K, Banerjee P K. An overview of reverse flotation process for coal[ J ]. International Journal of Mineral Processing, 2015, 134: 97 - 110.
[ 2 ]       Ehsani M R. Desulfurization of Tabas Coals Using Chemical Reagents[ J ]. Iranian Journal of Chemistry & Chemical Engineering-International English Edition, 2006, 25( 2 ): 59 - 66.
[ 3 ]       Vasilakos N P, Clinton C S. Chemical beneficiation of coal with aqueous hydrogen peroxide/sulphuric acid solutions[ J ]. Fuel, 1984, 63( 11 ): 1 561 - 1 563.
[ 4 ]       Dimitrijevic M, Antonijevic M M, Dimitrijevic V. Investigation of the kinetics of pyrite oxidation by hydrogen peroxide in hydrochloric acid solutions[ J ]. Minerals Engineering, 1999, 12( 2 ): 165 - 174.
[ 5 ]       Rendón N, Dávalos A, Carrillo F R, et al. Evaluation of Process Parameters of Coal Desulfurization in Presence of H2O2 and Complexing Agents[ J ]. International Journal of Coal Preparation and Utilization, 2014, 34: 85 - 97.
[ 6 ]       Sana H, Haider R, Rahim M U, et al. Effect of complexing agents on desulphurization and deashing of coal by H2O2/H2SO4 leaching[ J ]. Energy & Environment, 2018, ( 7 ): 1 142 - 1 154.
[ 7 ]       Mketo N, Nomngongo P N, Ngila J C. Evaluation of different mic-
rowave-assisted dilute acid extracting reagents on simultaneous coal desulphurization and demineralization[ J ]. Fuel, 2016, 163: 189 - 195.
[ 8 ]     Fallavena V, Inacio T D, Abreu C, et al. Acidic Peroxidation of Brazilian Coal: Desulfurization and Estimation of the Forms of Sulfur[ J ]. Energy & Fuels, 2012, 26( 1 ): 1 135 - 1 143.
[ 9 ]       Carrillo-Pedroza F R, Sanchez A D, Soria-Aguilar M, et al. Coal Desulfurization in Oxidative Acid Media Using Hydrogen Peroxide and Ozone: A Kinetic and Statistical Approach[ J ]. Energy & Fuels, 2009, 23( 4 ): 3 703 - 3 710.
[ 10 ]     Dimitrijevic M, Antonijevic M, Dimitrijevic V. Kinetics of pyrite oxidation by hydrogen peroxide in phosphoric acid solutions[ J ]. Journal of the Serbian Chemical Society, 1999, 64( 12 ): 753 - 764.
[ 11 ]     Boron D J, Taylor S R. Mild oxidations of coal: 1. Hydrogen pero-
xide oxidation[ J ]. Fuel, 1985, 64( 2 ): 209 - 211.
[ 12 ]     翁诗甫，徐怡庄. 傅里叶变换红外光谱分析[ M ]. 第三版. 北京：化学工业出版社，2016：410 - 417.
[ 13 ]     蓝叶青，黄    骁. 磷酸铁膜对黄铁矿氧化动力学行为的影响[ J ]. 环境化学，1999，18（ 1 ）：52 - 56.
[ 14 ]     Antonijevic M M, Dimitrijevic M, JANKOVIC Z. Leaching of pyr-
ite with hydrogen peroxide in sulphuric acid[ J ]. Hydrometallurgy, 1997, 46( 1 ): 71 - 83.
[ 15 ]     Saikia B K, Dutta A M, Baruah B P. Feasibility studies of de-sul-
furization and de-ashing of low grade medium to high sulfur coals by low energy ultrasonication[ J ]. Fuel, 2014, 123: 12 - 18.
[ 16 ]     Baruah B, Khare P. Desulfurization of oxidized Indian coals with solvent extraction and alkali treatment [ J ]. Energy & Fuels, 2007, 21( 4 ): 2 156 - 2 164.
[ 17 ]     邓亚民. 氧化性助剂对炼焦煤微波脱硫的影响[ D ]. 徐州：中国矿业大学化工系，2019．
[ 18 ]     刘    松，张明旭，卢旭东. 高硫煤微波辅助脱除有机硫试验研究[ J ]. 煤炭技术，2015，12（ 5 ）：3 - 8.