A COMPARATIVE STUDY OF GASES GENERATED FROM SIMULANT THERMAL DEGRADATION OF AUTOTROPHIC AND HETEROTROPHIC Chlorella  

作　　者：吴庆余 殷实 盛国英 傅家谟 

机构地区：[1]Department of Biology,Nanjing University,Nanjing 210008,PRC [2]Department of Physics,Southeast University,Nanjing 210018,PRC [3]Guangzhou Branch Institute of Geochemistry,Academia Sinica,Guangzhou 510640,PRC

出　　处：《Progress in Natural Science:Materials International》1992年第4期311-318,共8页自然科学进展·国际材料（英文版）

基　　金：Project supported by the National Laboratory of Organic Geochemistry and the FEYUT.SEDC,China.

摘　　要：Both autotrophically growing Chlorella cells with chlorophyll and heterotrophically growingChlorella cells without chlorophyll have been obtained by cell culture through controlling the supply of or-ganic and inorganic carbon and nitrogen.The content of protein in the cells of autotrophic algae is 5times as high as that in the cells of heterotrophic algae.On the contrary,the content of crude lipid in thelatter is 4.4 times as high as that in the former.The gas productive rate of autotrophic algal cells is a littlebit higher than that of heterotrophic algal cells,and the gases mainly contain CO₂,while theheterotrophic algal cells produce hydrocarbon gas at a much higher rate.With the rise of temperature,both kinds of cells display the rapid drop in the acid/alkane ratio of the gas components.Their ratios ofnormal and isomeric alkanes are all above 1.The ratio of ethane to ethyleme increases regularly with therising temperature.Therefore,it may be taken as one of the indexes for identifying the maturity of suchnatural gases.In particular,the comparative study has revealed that the actual potential ofmicroplanktonic algae in producing oil and natural gas should be much greater than what people haverecognized before.Both autotrophically growing Chlorella cells with chlorophyll and heterotrophically growing Chlorella cells without chlorophyll have been obtained by cell culture through controlling the supply of or- ganic and inorganic carbon and nitrogen.The content of protein in the cells of autotrophic algae is 5 times as high as that in the cells of heterotrophic algae.On the contrary,the content of crude lipid in the latter is 4.4 times as high as that in the former.The gas productive rate of autotrophic algal cells is a little bit higher than that of heterotrophic algal cells,and the gases mainly contain CO₂,while the heterotrophic algal cells produce hydrocarbon gas at a much higher rate.With the rise of temperature, both kinds of cells display the rapid drop in the acid/alkane ratio of the gas components.Their ratios of normal and isomeric alkanes are all above 1.The ratio of ethane to ethyleme increases regularly with the rising temperature.Therefore,it may be taken as one of the indexes for identifying the maturity of such natural gases.In particular,the comparative study has revealed that the actual potential of microplanktonic algae in producing oil and natural gas should be much greater than what people have recognized before.

关 键 词：natural gas CHLORELLA protothecoides AUTOTROPHIC and HETEROTROPHIC CULTURES thermal degradation 

分 类 号：N[自然科学总论]