|Liquefaction of Coal Mine Methane to produce LNG for Industrial and Transportation Applications||Last Reviewed 6/19/2013|
The primary objectives of this work are to conduct the first pilot-scale field demonstration of a process to capture, purify, and convert coal mine methane (CMM) into commercially significant volumes of liquefied natural gas (LNG); demonstrate the extent of reduction in CMM emissions; and demonstrate the efficiency and economics of producing LNG from CMM.
Appalachian-Pacific Coal Mine Methane Power Co, LLC, Washington, DC 20004
This project was awarded under a National Energy Technology Laboratory (NETL) program focused on developing improved methods for extracting coal mine methane (CMM) gas. The Appalachian-Pacific CMM Power Company LLC (A-P) planned to demonstrate a pilot process to convert coal mine methane from a mine in Mannington, WV into liquefied natural gas (LNG) that could be used to fuel heavy trucks. The liquefaction process originally envisioned was known as TASHER technology. The TASHER process was to be used to cool the methane to cryogenic temperatures to convert it to LNG, which could be used as a substitute for diesel fuel in modified fleet vehicles.
Subsequently the Mannington site became unavailable and Chart Industries sold its TASHER technology rights to Praxair, which shelved further development. Consequently, with DOE approval, A-P modified its project concept to encompass an approach to employ gas conditioning equipment to condition methane from coal mine gas for sale to a nearby natural gas pipeline (until CMM vehicle fuel markets can be developed) and then deploy non-TASHER refrigeration equipment to liquefy the purified and dehydrated CMM stream for use as a vehicle fuel.
The performer has made several unsuccessful attempts in subsequent years to reach agreement with operators in several states to conduct field demonstration of this modified approach.
This project, if successful, could demonstrate that commercial quantities of methane can be converted to LNG in an environmentally acceptable manner and could help develop regional markets for the sale of LNG as an alternative transportation fuel. These accomplishments could impact the U.S. energy portfolio by helping to demonstrate the viability of tapping into underutilized supplies of natural gas while simultaneously reducing the volume of CMM vented to the atmosphere.
Current Status (June 2013)
Despite diligent efforts, project personnel were not able to gain access to a field site from which to demonstrate the project concept of converting coal mine methane to an LNG fuel for the local/regional transportation market. The project reached its performance end date in March 2013 and a decision was made to not extend the effort to allow further pursuit of such a field site. Key project accomplishments are summarized above.
Project Start: September 30, 2000
Project End: March 31, 2013
DOE Contribution: $4,606,844
Performer Contribution: $6,390,508
NETL ? Rick Baker (firstname.lastname@example.org)
Appalachia Pacific ? Charles Estes (email@example.com)
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