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Chemosphere

Title:		The fate of sulfur during rapid pyrolysis of scrap tires
Author(s):		Hu H; Fang Y; Liu H; Yu R; Luo G; Liu W; Li A; Yao H;
Address:		"State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan 430074, China. State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan 430074, China. Electronic address: hyao@mail.hust.edu.cn"
Journal Title:		Chemosphere
Year:		2014
Volume:		20131113
Issue:
Page Number:		102 - 107
DOI:		10.1016/j.chemosphere.2013.10.037
ISSN/ISBN:		1879-1298 (Electronic) 0045-6535 (Linking)
Abstract:		"The fate of sulfur during rapid pyrolysis of scrap tires at temperatures from 673 to 1073K was investigated. Sulfur was predominant in the forms of thiophenic and inorganic sulfides in raw scrap tires. In the pyrolysis process, sulfur in organic forms was unstable and decomposed, leading to the sulfur release into tar and gases. At 673 and 773K, a considerable amount of sulfur was distributed in tar. Temperature increasing from 773 to 973K promoted tar decomposition and facilitated sulfur release into gases. At 1073K, the interactions between volatiles and char stimulated the formation of high-molecular-weight sulfur-containing compounds. After pyrolysis, almost half of the total content of sulfur in raw scrap tires still remained in the char and was mostly in the form of sulfides. Moreover, at temperatures higher than 873K, part of sulfur in the char was immobilized in the sulfates. In the pyrolysis gases, H2S was the main sulfur-containing gas. Increasing temperature stimulated the decomposition of organic polymers in scrap tires and more H2S was formed. Besides H2S, other sulfur-containing gases such as CH3SH, COS and SO2 were produced during the rapid pyrolysis of scrap tires"
Keywords:		Air Pollutants/*analysis Automobiles *Incineration Sulfur/*analysis Sulfur Compounds/analysis Temperature Rapid pyrolysis Scrap tires Speciation Sulfur;
Notes:		"MedlineHu, Hongyun Fang, Yuan Liu, Huan Yu, Ren Luo, Guangqian Liu, Wenqiang Li, Aijun Yao, Hong eng Research Support, Non-U.S. Gov't England 2013/11/19 Chemosphere. 2014 Feb; 97:102-7. doi: 10.1016/j.chemosphere.2013.10.037. Epub 2013 Nov 13"