改性褐煤超细粉吸附甲烷的研究
首发时间:2012-10-26
摘要:寻求一种廉价安全环保高效的甲烷存储方法,本文探究一种新的吸附材料及吸附机理。研究褐煤作为原材料,通过褐煤改性,提高甲烷吸附性能试验。首先,中温(700℃)半焦处理改变球磨褐煤超细粉孔隙率;然后,在通过中温半焦化处理的褐煤中加入稀土盐(LaCl3)改性,提高褐煤的分散性。实验结果表明:最终改性过褐煤的比表面积为381.143 m2/g是原样褐煤比表面积的3.93倍;其平均孔径为1.45538 nm是原样褐煤的10.5%倍;其甲烷吸附峰值为128740是原样褐煤的14倍。原样褐煤在球磨120分钟,经过中温焦化处理,添加稀土盐(LaCl3)改性,超细褐煤粉能够有效的吸附甲烷。
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Adsorption of Methane by Modified Ultrafine Powder Lignite
Abstract:For seeking a cheap ,safe and effective method of methane storage,a new adsorption material and adsorption mechanism were studied in this paper. Lignite were taken as raw material through lignite modification to improve methane adsorption . Firstly, through semi-coke (700℃) processing change porosity of ball -mill super fine powder lignite ;then, added rare earth(LaCl3) to improve its dispersion . The results show that eventually modified lignite specific surface area of 381.143 m2 / g is the same surface area than 3.93 times ; Its average diameter of 1.45538 nm is the same as 10.5% ; the methane adsorption peak of 128740 is the same 14 times . After milling for 120minutes and semi-coking in medium temperature,adding rare earth ,modified micro-pulverizing lignite can be effective adsorption methane.
Keywords: lignite semi-coke rare-earth modification methane adsorption
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