A TG-IR study on the co-pyrolysis characteristics of oily sludge and crops

Abstract

The co-pyrolysis characteristics of oily sludge (OS), wheat straw (WS), peanut straw(PS), and coconut shell (CS) have been studied experimentally with the thermogravimetric infrared analyzer, and the precipitation characteristics of the main reaction products were analyzed. During the separate pyrolysis of OS, the main weight loss stage appeared in 200–500 °C and the maximum weight loss peak appeared at 460 °C; its value is 8.42%/min. For the three additives, the main weight loss stage of all the three additives appeared in 200–400 °C; the maximum weight loss peak values of WS, PS, and CS were 11.38%/min, 8.77%/min, and CS 12.03%/min, respectively. It has been found that the three additives promoted the pyrolysis reaction of OS, and the mean apparent activation energy of the reaction was significantly reduced when the content of WS was 40%, PS was 40%, and CS was 50%. WS and PS make the pyrolysis process more adequate, and the amount of residual material is reduced. The addition of three additives could reduce the production of CH4 and CO and increase the precipitation of CO2.