Syngas generated from solid feedstocks can be converted to substitute natural gas (SNG) through gas treating and methanation reactions. Nexant has been involved with projects that consider all phases of the SNG process, from gasifier design, gas clean-up and shift, production of methane, and final transport. Major projects include:
- Arizona Public Service: The US DOE National Energy Technology Laboratory awarded four co-production projects in December 2005 to look into SNG production. Nexant has performed detailed design work into novel hydrogasification processes for Arizona Public Service. The project will research and develop a hydrogasification process to co-produce SNG and electricity from western coals. The proposed system uses hydrogen instead of air or oxygen in the gasification process, an approach that offers higher operating efficiencies, lower water consumption, and a gas product that is richer in methane than other gasification processes. The concept has the potential to produce SNG below the projected market price for natural gas. In addition, it will separate a carbon dioxide stream ready for sequestration.
APS/Nexant Status Report, Pittsburgh Coal Conference
Project Fact Sheet
- Great Point Energy: GreatPoint Energy, Inc. is commercializing a proprietary catalytic process called bluegas™ for converting coal and petcoke into clean-burning, pipeline quality natural gas. Production is expected to be centralized in close proximity to coal mining operations, where the carbon removed in the form of CO2 can be sold and sequestered for enhanced oil recovery. Other by-products typically generated by gasifying coal will also be captured as part of the gasification process and sold or safely disposed of.
GreatPoint engaged Nexant to evaluate various process configurations and to conduct an economic and engineering analysis. The principal purpose of the Nexant engagement was to independently evaluate process configurations and feedstocks to determine the efficiency, capital cost, and operating cost under various configurations and feedstocks in the bluegas™ process. The process configurations were identified based on the most attractive and scaleable market opportunities that exist for GreatPoint. The design basis for the catalytic gasification processes were identified and provided by GreatPoint and reviewed by Nexant.
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Tan-Ping Chen
Senior Vice President, Energy Technology
Tel: +1 415 369 1077
Email: tpchen@nexant.com
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