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Calgary-based Gas Liquids Engineering Ltd. (GLE) has designed a natural gas liquids (NGL) extraction process that could require less energy and lower operating costs.
GLE is touting the split absorber reflux (SABR) process, which extracts propane and ethane from natural gas.
“In many cases, SABR can recover propane and ethane with lower energy use, and better turndown than the historically used deep-cut technologies,” said Operations Vice President Stuart MacKenzie.
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Deep-cut extraction plants use turboexpanders to cool natural gas and draw out NGLs. The SABR process, however, uses propane refrigeration, shell/tube heat exchangers and distillation to extract NGLs.
In certain applications, SABR may require less energy than comparable technologies, as much as 5-20%. The process can also achieve propane or ethane recovery from natural gas of up to 99%, according to GLE.
The increased efficiency may “equate to significant reductions in carbon dioxide (CO2) emissions,” MacKenzie said.
Modified versions of the SABR process include models that support reduced energy consumption, increased NGL extraction from rich, lean, or high CO2 gas streams, as well as other applications.
GLE said it has engineered more than 250 oil and gas processing unit operations and associated infrastructure in 22 countries, with about 70% of its operations focused in Canada.
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Related topics: Ethane GHG emissions Propane
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