微生物降解对原油中咔唑类化合物的影响

EFFECT OF BIODEGRADATION ON CARBAZOLE COMPOUNDS IN CRUDE OILS

张春明 赵红静 梅博文 陈梅 肖乾华 吴铁生

Zhang Chunmin Zhao Hongjing Mei Bowen Chen Mei Xiao Qianhua Wu Tiesheng

不同微生物降解级别原油的地球化学分析表明,轻度的微生物降解作用,对原油中含氯化合物没有明显的影响;中等降解的原油,随降解程度的增加,唑、甲基唑和C-唑的浓度呈规律性的减小;严重降解原油,其含氯化合物浓度则显著降低。唑、甲基唑、C-唑的相对百分含量在非严重降解原油中,并没有明显的变化;而在严重降解原油中,唑和甲基唑明显降低,C-唑则升高。二甲基唑类,全屏蔽型、半屏蔽型、全裸露型三类异构体的相对百分含量,在非严重降解原油中无明显变化;在严重降解原油中,全屏蔽型和全裸露型增加,而半屏蔽型降低。

Geochemical analysis of different degrees of biodegradated crude oils show that a slight biodegration affects little to the pyrrolic nitrogen compounds in the oils. The concentrations of cathazole, methylcarbazole and C-carbazole decrease with the increasing of the biodegradation for mid-degree biodegraded oils, the concentrations of pyrrolic nitrogen compounds sharply decrease in the heavily biodegraded oils. The relative concentrations of carbazole, methylcarbazole and C carbazole do not show any apparent changes in the non-heavly biodegraded oils; in the heavilybiedegraded oils, the concentrations of carbazole and methylcarbazole decrease, but that of the C-carbazole increases.As the C-carbazole isomers, the relative Percentage contents of the pyrolic N-H shielded, the prplic N-H semishielded and the pyrolic N-H-exposed carbazoles do not display any obvious variation in the non-heavily biodegraded crude oils, but that of the pyrrolic N-H-exposed carbazoles increase and that of the pyrrolic N-H semi-shielded carbazoles decrease in the heavily biodgraded oils.

10.11743/ogg19990416