Pipeline Quality Gas
What is "Pipeline Quality Gas"?
"Pipeline Quality Gas," is the purified and processed form of natural gas (CH4, natural gas or methane) that has had about 97% to 98% of the liquids (i.e. natural gas liquids), impurities and contaminants such as H2S (hydrogen sulfide) removed to meet "pipeline quality" requirements. This makes the natural gas useable to residential, commercial and industrial customers.
Pipeline Quality Gas is also used in the biogas and biomethane industry. In this case, "raw" biogas that is produced from Anaerobic Digesters and Landfill Gas To Energy projects cannot be sold to natural gas pipelines or used in natural gas engines due to the high number of contaminants, impurities and other chemicals in the biogas.
Raw biogas, in order to become Biomethane or Pipeline Quality Gas, must be cleaned of the impurities and contaminants of the biogas are removed. This process of biogas purification to biomethane is also called "Gas Sweetening." The impurities and contaminants of biogas that need to be removed to then have Biomethane or Pipeline Quality Gas include; carbon dioxide (CO2), water, hydrogen sulfide (H2S) and Siloxane. Some of the Biogas to Biomethane technologies include; iron sponge, water scrubbing, membrane separation, pressure swing adsorption (PSA), and mixing with higher quality gases.
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