【摘要】 采用碳热法在1 700℃,氩气气氛条件下,以焦炭为碳源与生石灰反应1.5 h,对所得样品采用X射线粉末衍射仪和透射电子显微镜TEM进行检测。结果表明此反应条件可成功合成电石。为研究不同碳源对于电石合成产率的影响,以焦炭、石油焦、活性炭为碳源,分别与生石灰进行合成反应,试验结果表明以活性炭为碳源对电石合成最为有利,产品的发气量可达179.5 L/kg,比以焦炭、石油焦为碳源的电石产品的发气量分别高出15%和7%。对各种碳源及其产品的孔道结构和组成数据进行分析,可看出活性炭孔道结构发达、反应活性位点多,挥发分含量高,反应过程中可以形成活性的碳物种,这更有利于促进反应的进行。更多还原

【Abstract】 The carbon thermal method was applied at 1 700 ℃ and under the argon gas atmosphere,based on the coke with 1.5 h reaction time between the carbon sources and limestone,X-ray powder diffraction meter and transmission electron microscope(TEM) were adopted to inspect and measure the samples obtained.The results showed that the reaction conditions could synthesize the calcium carbide.In order to study the different carbon sources influenced to the calcium carbide synthesis production rate,the coke,petroleum coke and activated carbon as the carbon sources were individually with the limestone for the synthesis reaction.The test results showed that the activated carbon as the carbon sources was the most favorable to synthesize the calcium carbide and the gas output of the product could be reached to 179.5 L/kg,which would be 15% and 7% individually higher than the gas output of the calcium carbide products with coke and petroleum coke as the carbon sources.The pore passage structure and composition data were analyzed for the different carbon sources and the products.The activated carbon was well developed in the pore passages,and had multi reaction active locations and high volatile content.During the reaction procedure,the active carbon species could be formed and could be favorable to promote the reaction.更多还原