Abstract

Landfill gas is an interesting source of prime energy since it contains about 50–55 vol% methane. Utilization, however, must take into account the traces of halogenated hydrocarbons and H 2S that are present in the gas. This paper reports two years of experience with a pilot plant for the production of a gas with natural-gas quality. Essentially the process consists of two stages: an adsorption for the separation of the trace components and a membrane unit for the separation of CO 2. The process is discussed in detail and compared with alternatives for the utilization of landfill gas such as power generation by gas-engines with generators, eventually in combination with a waste-heat boiler

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