应用XPS研究煤中有机硫在脱硫时的存在形态

THE APPLICATION OF XPS TO STUDYING THE FORMS OF ORGANIC SULFUR IN COAL DESULFURIZATION

应用Ｘ－射线光电能谱（ＸＰＳ）研究了几种煤中有机硫在脱硫过程中的存在形态。通过模型化合物（ｍｏｄｅｌｃｏｍｐｏｕｎｄｓ）中硫的２Ｐ层电子的ＸＰＳ结合能，可用来估算煤中硫的归属，如硫醇、硫醚及噻吩类硫。南桐东林煤中有机硫以噻吩型硫为主，亦存在少量硫醇及硫醚型硫，兖州北宿１６层煤则以噻吩型硫及硫氧化合物为主。用乙醇超临界抽提及高能辐射处理２种煤样，均能脱除一定量的有机硫。初步认为乙醇超临界提法能脱除煤中硫砜及硫醇型硫；射解脱硫除脱除无机硫外，亦能除去部分硫氧化合物型硫。这一初步探索为今后煤分子结构及脱硫方法的研究提供了重要的科学依据。

The experimental results by XPS on studying the forms of organic sulfur in coal desulfurization were presentedThe binding energy of sulfur which exists in different forms were obtainedChemical forms of XPS sulfur 2P spectrum were classified by their binding energies on the basis of results of model compounds to estimate the sulfureous forms such as sulfoether,thiophene analogues and sulfur alcohol ,etc A number of thiophene analogues were existed in Donglin coal,also existed minor part of sulfur alcohol and sulfoetherAfter desulfurization by supercritical with alcohol for Donglin coal,Nantong,the organic sulfur mainly sulfur alcohol and sulfone were removedThe thiophene like and sulfoxides were the major part from Beisu caol,Yanzhou,before irradiationThe content of sulfoxides will be reduced after irradiation for desulfurization of Beisu coalThese results give further information to study the coal structure and explore new removal methods of organic sulfur in coal