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Tailgas Considerations for Biogas Upgrading

By Anoosheh Oskouian and Mike Pawlowski, Ship & Shore Environmental |

Thermal oxidation is used to destroy tailgas from biogas-upgrading facilities. Presented here are guidelines for selecting the proper method With the evolving economics of renewable energy credits comes increased interest in biogas-upgrading facilities. Renewable natural gas (RNG) plants are being designed and built at a remarkable pace. Many scholarly articles have been written to address the pros and cons of each popular method of biogas enhancement. The objective is to process as much of the methane into a high-purity form for injection into the natural gas pipeline, while efficiently removing all undesirable impurities from the raw gas. These impurities include O2, H2O, H2S, N2, CO2 and other trace amounts of volatile organic compounds (VOCs) that are present in the feed. A combination of technologies is often used to accomplish this goal, and most of the facilities, at some point, must deal with the issue of disposing or destroying the impurities that are removed from the incoming raw gas. Since the tailgas contains VOCs, thermal oxidation is often employed. This article is a general guideline for selecting the proper method of thermal oxidation that will effectively and efficiently destroy tailgas produced by the typical biogas-upgrading…
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