柴油生物脱硫技术的前景与挑战

近年来,随着排放标准的不断提高,石油工业投资越来越大.使用便捷加氢脱硫(HDS)工艺,是在氢存在条件下把S催化转化成H2S,这些反应只有在高温高压下才能进行.生物脱硫被认为可以有效补充甚至取代传统的加氢脱硫(HDS).研究发现可以运用需氧或厌氧细菌来完成微生物脱硫工艺过程.本文讨论了微生物脱硫的最新研究动态及其商业化进展.

Biotechnology of desulfurization of diesel: prospects and challenges

To meet stringent emission standards stipulated by regulatory agencies, the oil industry is required to make a huge investment to bring down the sulfur content in diesel to the desired level,using conventional hy drodesulfurization (HDS) technology,by which sulfur is catalytically converted to hydrogen sulfide in the presence of hydrogen. These reactions proceed rapidly only at high temperature and pressure and therefore the capital cost as well as the operating cost associated with HDS very high. Biological desulfurization has the potential of being developed as a viable technology downstream of classical HDS. Various attempts have been made to develop biotechno-logical processes based on microbiological desulfurization employing aerobic and anaerobic bacteria. However ,there are several bottlenecks limiting commercialization of the process. This review discusses various aspects of microbial desulfurization and the progress made towards its commercialization.