Direct methane conversion process evaluations

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Abstract
The first task in this study is to screen direct methane conversion processes and select three for process design and cost evaluation. Criteria used are: degree of definition; economic potential; projected thermal efficiency; number of steps involved; and operating severity. Advances in methanol synthesis technology leading to potential improvements in overall gas to liquid hydrocarbon economics are also screened and relative costs and efficiencies are compared with conventional processing. The second task is to develop comparative economics for the three selected technologies. Design bases and block flow diagrams outlined during the screening effort are finalized. Capital costs are estimated based on the process flow diagram, equipment list with sizing, utility requirements, steam and water balances, storage requirements, and appropriate sizing criteria for other offsite facilities. Conventional plants are estimated based on capacity factors. Operating costs are developed and production costs for each case are compared with conventional technology as a function of gas price.

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