The integrated co production concepts have generally

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Unformatted text preview: iquids is much higher for EF gasification resulting from the presence of all the chemical energy in the gas as syngas compounds (CO and H2). The integrated co-production concepts have generally higher net energy efficiencies compared to the parallel co -production concepts. The main overall conclusion of the study is that the co-production of FischerTropsch transportation fuels and Synthetic Natural Gas (SNG) from biomass is economically more feasible than the production of both energy carriers in separate processes. Co-production of “green” FT transportation fuels and “green” SNG will become an economic feasible process in the Netherlands, when both energy carriers receive the same tax exemptions as currently are given to green electricity. FT liquids FT synthesis Biomass Methanation Press. CFB (O2 ) o r indirect gasification SNG Methanation Fig. 5 Optimal system for (integrated) co-production of “green” FT transportation fuels and “green” SNG[14]. ECN-RX--04-085 9 BIOMASS GASIFICATION / METHANATION Based on comparable assumptions, a technical, economic, and ecological assessment has been carried out for SNG production by combined biomass (hydro)gasification / methanation processes. The objective of the study was to make a selection for future implementation of the promising technologies for the production of SNG from biomass and waste in the Netherlands[19]. The following gasification-based stand-alone SNG production routes have been considered: (1) Pressurised O2-blown CFB gasification with downstream methanation. (2) Atmospheric indirect steam- blown gasification with downstream methanation. (3) Pressurised BFB hydrogasification with downstream methanation. The main pre-conditions for the stand-alone gasification concepts were production of a tar-free, low-nitrogen, and high methane content product gas, and the up-scaling potential of the technology to a commercial scale. Air-blown CFB gasification due to a high nitrogen content of the produced gas, and entrained-flow gasification due to zero methane content of the pro...
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This essay was uploaded on 03/18/2014 for the course ENG 316K taught by Professor Kruppa during the Spring '08 term at University of Texas.

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