水焦浆燃烧动力学参数求解方法

利用热重分析仪获得水焦浆的燃烧失重特性曲线，采用四种动力学模型求解了水焦浆的活化能，分析了其动力学特性，并与兖州烟煤水煤浆进行对比。结果表明，同一反应深度（转化率a）水焦浆的活化能低于烟煤水煤浆；Coats-Redfern法可以得到燃烧过程的平均活化能，得到水焦浆的反应级数为0.7，烟煤水煤浆的反应级数为1.0；等转化率的Flynn-Wall-Ozawa法和Friedman-Reich-Levi法可以得到活化能随转化率的变化趋势，后者结果更可靠；非Arrhenius公式的Dollimore法可以得到和Friedman-Reich-Levi法相近的活化能结果,这两种方法可以作为求解水焦浆燃烧动力学参数的优选方法。

Kinetic Parameters of Petroleum Coke Water Slurry Combustion by Different Methods

Thermoanalysis curves of combustion of a petroleum coke water slurry(PCWS) were recorded by a thermogravimetric apparatus. Kinetic parameters such as activatin energy of PCWS were evaluated by four different methods, and compared with that of a coal water slurry(CWS) prepared with bituminous coal from Yanzhou, Shandong. Results showed that the activation energy of PCWS was smaller than that of the bitumous CWS at certain conversion rates; using Coats-Refern method, an average activation energy of the whole combustion process can be achieved, and the reaction order, n, of PCWS and Yanzhou CWS was 0.7 and 1.0 respectively; the relationship between activation energy and conversion rates was plotted by Flynn-Wall-Ozawa method, also by Friedman-Reich-Levi method, and the results of the latter were more credible; activation energy obtained by Dollimore method, which was not originated from the Arrhenius formula, approximated to that by Friedman-Reich-Levi method.The last two methods are superior to others in evaluating kinetic parmeters of PCWS.