煤变质热动力学方程的初步评判
Preliminary Evaluation of the Thermodynamics Equation of Coal Metamorphism

基于吴冲龙先生的温度–时间–反射率煤变质热动力学方程，计算四例已知时间和温度求反射率、一例已知时间和反射率求温度以及计算褐煤临界温度和长焰煤临界温度。结果表明：温度–时间–反射率经验公式能在一定程度上可以解释煤变质作用，褐煤临界温度为49.3℃和长焰煤临界温度为56.9℃；应用反射率增量和时间增量耦合的方法制备石炭、侏罗、白垩纪成煤期的中煤级煤II温度–反射率(时间)图，并用等温水平线或等反射率垂直线说明“受热时间越长，煤化程度越高”等煤化学的有关论述。利用四川南桐煤田煤变质古地温场文献中的温度和有效变质时间进行交叉验证，进一步证明该方程有一定的精确实用性。
Using Mr. Wu Chonglong’s temperature-time-reflectivity coal metamorphism thermodynamic equation to calculate reflectivity for four cases of known time and temperature and to calculate temperature for one case of known time and reflectivity, all of those examples are proving that the temperature-time-reflectivity experience formula can explain the role of coal metamorphism to some extent. It is calculating that the critical temperature of lignite should be 49.3？C and that of long flame coal should be 56.9？C. A temperature-reflectivity (time) graph has been prepared for Carboniferous, Jurassic, and Cretaceous periods’ middle grade II coal through innovative application of reflectivity increment and time incremental coupling method. The isothermal horizontal line or iso-reflectivity vertical line in the graph can be used to explain the “longer heating time, higher degree of coalification” and other coal chemistry related discussion. Cross-verification with the temperature and metamorphism time in the literature for Nantong coalfield in Sichuan province further proves the accuracy and practicability of the equation.