Gupta Nidhi, Roychoudhury P K, Deb J K
Department of Biochemical Engineering and Biotechnology, Indian Institute of Technology Delhi, Hauz Khas, New Delhi, 110016, India.
Appl Microbiol Biotechnol. 2005 Jan;66(4):356-66. doi: 10.1007/s00253-004-1755-7. Epub 2004 Nov 5.
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 hydrodesulfurization (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 biotechnological 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.
为满足监管机构规定的严格排放标准，石油行业需要投入巨额资金，采用传统的加氢脱硫（HDS）技术，将柴油中的硫含量降至理想水平。在该技术中，硫在氢气存在的情况下通过催化作用转化为硫化氢。这些反应仅在高温高压下才能快速进行，因此与加氢脱硫相关的资本成本和运营成本都非常高。生物脱硫有潜力发展成为经典加氢脱硫下游的可行技术。人们已进行了各种尝试，以开发基于利用好氧和厌氧细菌进行微生物脱硫的生物技术工艺。然而，仍存在若干限制该工艺商业化的瓶颈。本文综述了微生物脱硫的各个方面及其商业化进程。
