Deuterium tracer studies on cobalt catalyzed Fischer-Tropsch synthesis: Addition of alcohols

作者：Shi Buchang^*; Jin Chunfen

来源：Applied Catalysis A: General , 2011, 398(1-2): 54-58.

DOI：10.1016/j.apcata.2011.03.011

• Deuterium tracer
• Fischer-Tropsch synthesis
• Alkylidene mechanism
• C-C coupling

Unlike the iron catalyzed Fischer-Tropsch (FT) synthesis, the additions of ethanol-d(6) and 2-propanol-d(8) during the Co/SiO(2) catalyzed FT reactions did not produce detectable amount of deuterated isomer in any alkane. However, when the FT reactions were conducted over a mixture of FT catalyst Co/SiO(2) and dehydration catalyst Al(2)O(3). the d(1), d(2) and d(3) isomers of alkanes from C(7) to C(15) were obtained with a nearly constant D/molecule value of 1.4 when ethanol-d(6) was used as the tracer while d(1)-d(6) isotopic isomers of alkanes were observed with a nearly constant D/molecule value of 2.3 when 2-propanol-d(8) was used. The similar results were obtained when 1-propanol was used as the tracer. These results lead us to conclude that the C(2) or C(3) species that initiates the chain growth in the FT reaction resembles ethene or propene. The pathways for the formations of ethylidene and propylidene were proposed.

• 出版日期2011-5-15