CBM Liquefaction Research Oxygenated

With the development of society and economy, human demand for resources is increasing, in addition to the development of conventional natural gas for human use, people are also actively seeking unconventional energy to meet bigger demand. Coalbed methane (CBM). a kind of unconventional fossil energy with its huge proven reserves comparable to natural gas, in which the main composition is non-renewable energy---methane. Yet. most of CBM exists between the microporous wall gap in the form of multilayer physisorption in which coal and air are Inevitably in contact. It was because of the highly-explosive mixture of CBM and oxygen that caused the deadly coal mine casualty so frequently. In order to avoid more coal mine explosions, most of coal mines discharge the CBM in advance during the mining process. Although such means is for the sake of safe mining, the large amount of Coalbed Methane emission into the atmosphere will not only increase the atmospheric greenhouse effect and (CH4greenhouse effectiveness is21times more than CO2), such emissions in which the main composition is methane, also pitifully wasted a lot of useful non-renewable sources of energy.To address the oxygenic Coalbed Methane (CBM) exploitation and utilization problem, this paper is dedicated to the following work:(1) Investigation of the current technologies adopted by the Coalbed Methane (CBM) exploitation industry. Due to there are other impurity components in the CBM. coal-bed gas purification and dehydration process are needed;(2) Study in coal bed methane deoxidization methods. Enumerated and researched several deoxidization methods like methane-oxygen separation and pre-liquefied deoxidization, and studied in how to compare and choose appropriate deoxidization processes.(3) Focus on the liquefaction process. Studied the mixed refrigerant liquefaction process and nitrogen-cold methane expansion mechanism liquefaction process, then selected one of the processes to analyze all aspects of parameters. And adopted research methods specific to Coalbed Methane(CBM)---explosion limit analysis and analysis combining with chemical engineering. In view of the heat transfer optimization and all kinds of heat exchange equipments, using pinch analysis theory to adjust the parameters of the liquefied process to be more reasonable.