论文部分内容阅读
为了研究ZnO对焦炭气化反应的催化作用,采用热重分析法(TGA)对不同ZnO质量分数的两种焦炭(Coke A和Coke B)气化反应进行对比研究。结果表明,在一定ZnO质量分数范围内,随着ZnO质量分数的增加,其对焦炭气化反应的催化作用越明显。通过对比特征温度,发现ZnO对Coke B气化反应的影响较明显。从碳转换速率(DTG)曲线中发现,添加ZnO后的焦炭气化反应速率从开始反应温度到950℃左右呈升高趋势,氧化锌质量分数越高,反应速率越快,950~1056℃时反应速率趋于稳定,之后再次呈上升趋势。利用Kissinger-AkahiraSunose(KAS)模型计算动力学参数,发现添加ZnO使焦炭气化反应活化能降低。
In order to study the catalytic effect of ZnO on the gasification reaction of coke, the gasification reactions of two coke (Coke A and Coke B) with different ZnO mass fractions were investigated by thermogravimetric analysis (TGA). The results show that the catalytic effect of coke on the gasification reaction is more obvious with the increase of ZnO mass fraction within a certain range of ZnO mass fraction. By comparing the characteristic temperature, it is found that the influence of ZnO on the gasification reaction of Coke B is obvious. From the carbon transfer rate (DTG) curve, it was found that the gasification rate of coke after adding ZnO increased from the initial reaction temperature to about 950 ℃. The higher the mass fraction of zinc oxide, the faster the reaction rate. At 950 ~ 1056 ℃ The reaction rate tended to stabilize and then increased again. Kinetic parameters were calculated using the Kissinger-Akahira Sunose (KAS) model. It was found that the addition of ZnO reduced the activation energy of coke gasification.