by Dept. of Energy, for sale by the National Technical Information Service in [Washington], Springfield, Va .
Written in English
|Series||FE ; 2496-38|
|Contributions||Massey, Michael J, United States. Dept. of Energy|
|The Physical Object|
• Integrated simulations are needed for environmental assessment • Careful environmental and operations monitoring must be done during and after gasification Only 2 of over 30 UCG U.S. trials resulted in environmental contamination. In addition to discussing recent advances and outlining future directions, it covers advanced topics such as underground coal gasification and chemical looping combustion, and describes the state-of-the-art experimental techniques, modeling and numerical simulations, environmentally friendly approaches, and technological challenges : Springer Singapore. coal is injected into a bed of inert par ticles that is ﬂu- idized by steam and air (or oxygen) at high pressure. Rising oxygen-enriched gas reacts with suspended coal atAuthor: David Rand. Since the last review in , the installed power increased by 7 %, resulting in the largest recorded increase for coal gasification at 18 %. For other fuels, there was a clear decrease in the amount of gas produced, particularly for biomass and petroleum coke ( % and .
2 Coal gasification 8 IEA CLEAN COAL CENTRE Gasification is a process by which coal can be converted into syngas (CO + H 2), that can then be used to produce a range of chemicals, either directly or via intermediates, such as methanol. Typically, 1 kg of bituminous coal . Gasification avoids burning coal altogether: it turns coal into gas. One of the major environmental opportunities of this technology is the fact that impurities can be almost entirely filtered out when coal is transformed from a solin into a gas, alleviating many of the environmental concerns of coal . Environmental performance of gasification should be investigated for better design of the process. Life cycle Assessment (LCA) is a cradle-to-grave approach formalized by the International Organization for Standardization (ISO, ), which has been regarded as a valuable environmental assessment tool for the chemical industries (Khoo. Gasification-based processes for power production characteristically result in much lower emissions of pollutants compared to conventional coal combustion. This can be traced to the fundamental difference between gasification and combustion: in combustion, air and fuel are mixed, combusted and then exhausted at near atmospheric pressure, while in gasification oxygen is normally supplied to the.
Gasification technology is presented from a historical perspective considering early uses of coal, the first practical demonstration and utilization of coal gasification, and the evolution of the. D.W. Camp, in Underground Coal Gasification and Combustion, Abstract. Underground coal gasification research and development took place in the United States from to , including the intense and productive period from the mids to the late s. The marquis activities were extensively-monitored field tests. A conceptual understanding of how UCG works was developed . THE PEMBINA INSTITUTE UNDERGROUND COAL GASIFICATION iii Acknowledgements!e Pembina Institute would like to acknowledge the assistance of several individuals that assisted in the development of this report.!ey do not necessarily endorse the results of this analysis and did not review . the CCT Program is to make available to the U.S. market a number of advanced, more efficient, and environmentally responsive coal utilization and environmental control technologies. The Coal-Fired Diesel Generator project, which would be conducted at the University of Alaska, Fairbanks, was selected under a competitive solicitation of the CCT.