Development of the Utilization of Combustible Gas Produced in Existing Sanitary Landfills: Evaluation of the Use of Carbon Dioxide Produced in Sanitary Landfills.

摘要

The potential markets are surveyed for carbon dioxide derived from the purification of landfill gas into 1) a methane rich stream which can be used as a high Btu (950/SCF) fuel gas, and 2) a carbon dioxide-rich stream. Interviews with individuals in the CO sub 2 industry have revealed the potential markets for CO sub 2 , gas purities required for different applications, and wholesale prices for CO sub 2 . A review of the technology for landfill gas purification has been included, and various processes have been matched to the CO sub 2 markets based on the composition of the CO sub 2 rich effluent stream. Estimates of the capital, operating, and unit gas costs for the various purification processes, and energy balances for the several processes are included. It is recommended that detailed economic and market analyses be performed for individual landfill sites, in order to identify the markets, if any, for CO sub 2 near the landfills, determine the purification processes which will yield CO sub 2 of sufficient purity for these applications, and to select the market and purification techniques which will produce the lowest unit gas cost for fuel gas from landfills. (ERA citation 08:005577)