摘要
高硫化石燃料必须预先经过脱硫处理才能进一步使用。化石燃料中含有的有机硫化合物成分复杂 ,大部分是杂环化合物 ,其中的C S化学共价键十分牢固。物理的和化学的脱有机硫方法成本大 ,而微生物脱硫工艺由于操作压力、温度低 ,运转成本少 ,具有广阔的前景。将二苯并噻吩(DBT)作为模式反应物的微生物脱有机硫专一途径 (“4S”途径 )由于仅打开C S键 ,而不打开C—C键 ,以特有的酶系统仅将硫从杂环中脱下来 ,不损失燃料热值的途径引起广泛的关注。微生物硫专一途径 (“4S”途径 )在专一性脱化石燃料有机硫研究中有一定的意义。
Most of sulphur in fossil fuel is in the form of heterocyclic organic compounds,which are recalcitrant to the current chemical and physical method for sulphur removal.The C\|S covalent bond of organic heterocyclic compounds is too rigid to break.Physical,chemical and microbiological desulphurization techniques can remove inorganic sulphur from fossil fuel prior to combustion,but the removal of organic sulphur remains problematic.Thus,a cost\|effective alternative to the chemical physical process is needed Since biocatalytic processes are cheap,operate under mild conditions and are endowed with high selectivity,there has been considerable effort to develop bioprocesses for fossil fuel desulphurization.Dibenzothiophene (DBT) is used as a model compound for organic sulphur integrated in the fossil fuel.The sulphur specific pathway (“4S” pathway) by microorganism in DBT desulphurization is potentially useful for removing the sulphur from the compounds in petroleum and/or coal without decreasing their calorific value.\;
出处
《生物工程进展》
CSCD
2000年第3期55-59,共5页
Progress in Biotechnology
关键词
微生物脱有机硫
二苯并噻吩
化石燃料
Microbial organodesulphurization,“4S” pathway,Dibenzothiophene
