细菌降解前后小球藻热模拟生成的气、油和类干酪根

GAS, OIL AND KEROGEN-LIKE MATERIAL GENERATED BY PYROLYSIS OF CHLORELLA BEFORE AND AFTER BACTERIAL DEGRADATION

本文对比研究了枯草杆菌降解作用前后小球藻热模拟生成的气、油和类干酪根的特征。经细菌降解作用后，小球藻热解产气率提高了２．０９倍，热解产气组分中烃气／非烃气比值提高了一倍。蛋白质可能是小球藻热模拟产气的重要分子来源。细菌的降解作用对于早期成因的生物气或生物热催化气的形成具有重要意义。细菌降解作用可提高小球藻细胞的粗脂肪（氯仿沥青＂Ａ＂）含量，而类脂化合物是藻细胞热解产生烷烃的主要分子来源，因此，经细菌降解的藻细胞热解后具较高的烷烃产量。类干酪根分析结果表明，细菌降解的藻细胞在热解时更易凝胶化；细菌降解作用有利于藻细胞进入热演化生烃期，并有利于提高藻细胞的产烃性能和潜力。

Untreated Chlorella and bacterially degraded Chlorella samples were obtained in laboratory. Gas, oil and kerogen-like material generated by pyrolysis of the samples were studied.After bacterial degradation, the gas generation rate of Chlorella increased by 209%, and the value of hydrocarbon gases to non-hydrocarbon gases was doubled. Protein may be the main origin of the pyrolysate gases of Chlorella. Bacterial degradation is important to the development of the bio-gas and bio-thermocatalytic gas during early period. The degradation increased the lipid (chloroform extracts) content of Chlorella cells, while lipid is the main origin of pyrolysate alkane, so bacterially degraded algal cells have a higher alkane productivity.The analytic results of kerogen-like material samples show that bacterially degraded algal cells have a tendency to gelation during pyrolysis; bacterial degradation help the algal cells to enter the hydrocarbon productive period and to increase the ability and potential of hydrocarbon productivity of algal cells.