MODEL DEVELOPMENT FOR SINGLE-STAGE COAL COPROCESSING WITH PETROLEUM WASTE

Coal coprocessing with waste petroleum materials achieves the dual pur pose of upgrading both the coal and the waste materials economically. The kinetics of coal coprocessing with petroleum waste has been studie d experimentally and modeled mathematically. A combined parallel and s eries reaction scheme was assumed for the coal liquefaction. Experimen ts were carried out in a tubing bomb microreactor at temperatures of 3 75 to 425 degrees C, at reaction times of 15-120 min, with 10% coal lo ading and with 1250 psig pressure. Coal conversions as high as 98% wer e obtained during coprocessing. More than 70% conversion to oil is ach ieved at high temperatures and grease loadings. The effect of temperat ure and grease loading on coal liquefaction were also studied. A rigor ous parameter estimation technique was employed to determine the param eters involved in the model. The model predictions are good for experi mental conditions other than those used to determine the model paramet ers. Higher conversion and higher rate of liquefaction obtained during coprocessing were explained from the obtained kinetic rate parameter values.