Biogas
正宗スロット3 Coal Mine Methane Concentration Technology to Make Efficient Use of Coal Mine Methane Gas Released into the Atmosphere
Overview
Coal mine methane (CMM) with 30% or less methane concentration (正宗スロット3 CMM) has been unutilized and vented to the atmosphere after extraction from coal seams to ensure safety of workers mining coal, being a cause of global warming. Osaka Gas has been working on developing a 正宗スロット3 CMM concentration technology to utilize otherwise unused 正宗スロット3 CMM as fuel for gas engines and gas boilers and to promote energy-saving and environmental protection efforts.
Features
- 1. The concentration technology concentrates 正宗スロット3 CMM with Osaka Gas's proprietary material technology, which adsorbs methane selectively from an air-methane gas mixture.
- 2. The technology enables utilization of methane otherwise released to the atmosphere with its global warming potential 21 times higher than that of carbon dioxide. A reduction of greenhouse 正宗スロット3 emissions by installing one standard commercial unit (CMM flow rate: 2,000 m3/h) is expected to be approximately 40,000 t-CO2a year.
This technology enables use of 正宗スロット3 CMM (which has been released into the atmosphere) for various applications. For example, concentrated CMM can be used as fuel for gas engine power generation and gas boilers as well as city gas for households and industrial uses.
Achievements and Future Plans
In fiscal years 2007 and 2008, Osaka Gas formed a joint research consortium (comprising five companies, including Chinese enterprises) to undertake a joint research project for “Development of Methane Concentration Technology Aimed at Effective Use of 正宗スロット3 CMM (Coal Methane Gas),” under the auspices of the New Energy and Industrial Technology Development Organization (NEDO). A demonstration plant to concentrate CMM (CMM flow rate: 1,000 Nm3/h) was built at the Fuxin Coal Mine in Liaoning Province, China, and 正宗スロット3 CMM extracted from the coal mine was successfully concentrated through the demonstration.
Currently, Osaka 正宗スロット3 has licensed this technology to a company, which is promoting its commercialization.
Photo: Pilot Plant
Specifications for Standard Commercial Plant
| Process capacity | 2000 Nm3/h |
|---|---|
| Concentration performance | 25% or more |
| Methane recovery rate | 90% or more |
| Operation | Automatic operation at the touch of a button |
| Energy savings | Approx. 3,000 kL/year |
| Greenhouse 正宗スロット3 emissions reduction | Approx. 40,000 t-CO2/year |
* Concentration performance (%) = Methane concentration of product 正宗スロット3 – Methane concentration of feed 正宗スロット3
* Methane recovery rate (%) = (Methane concentration of product 正宗スロット3 × Integrated volume of product 正宗スロット3) ÷ (Methane concentration of feed 正宗スロット3 × Integrated volume of feed 正宗スロット3)
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