Research and application of desulfurization technology in bituminous coal pyrolysis

Wang Zhizheng; Pei Xianfeng

doi:10.13226/j.issn.1006-6772.2017.04.016

Abstract：In order to improve the quality and efficiency of pyrolysis production,from the viewpoint of desulfurization,the application and research status of desulfurization technology in various sections were reviewed for sorting out the whole process desulfurization of pyrolysis.The whole process of desulfurization of pyrolysis includes three parts:coal desulfurization,pyrolysis desulfurization and gas desulfurization.Some coal desulfurization technologies,such as heavy medium washing and flotation have been commercialized application;while others such as electric separation,magnetic separation,microbial and chemical desulfurization methods are still under development;Pyrolysis desulfurization technologies,including those in different atmospheres and those with different additives,are in the research stage;in contrast,wet oxidation methods are the most widely used gas desulfurization technology.In order to achieve the effective desulfurization of the whole process,the following aspects should be further strengthened,① increasing the application scope and research of pre-coking desulfurization technology;② strengthening the research and development of organic sulfur removal technology;③ researching and developing the environment friendly technologies to reduce process pollution.