低温合成电石反应及催化机理的研究

Synthesis of low-temperature reaction of calcium carbide

通过试验确定焦炭与氧化钙至少在1 700℃的温度下才可生成电石,并在此基础上进行催化剂的筛选。通过表征分析,添加K^+,Ca^(2+),CO_3^(2-)后可以显著提高电石生成速率。在分析的基础上,推导了K^+,CO_3^(2-)的催化作用机理,在机理中合成碳化钙的过程中实际起催化作用的是K_2O和CO_3^(2-)。除此之外,还利用XRD,BET等手段对原料、产品进行了表征。

The experiments were done to confirm the feasible te mperature to synthesize calcium carbide and to screen the catalysts.The experiment results showed that the lowest synthesis temperature of calcium carbide was 1 700℃.K＋,Ca2＋,CO3 2- could promote the synthesis of carbide greatly.According to the experiments result and the analysis,the catalytic mechanism of K＋,CO3 2- were derivated.In these mechanism K2O,CO3 2- were catalysts in the synthesis process of calcium carbide.Besides,the gas volume produced from the product was analyzed,for the product,XRD,BET test was performed.