Co-combustion characteristics and kinetics of coal, oil shale and petroleum coke
Tian Hong
Liao Zhengzhu
Abstract：In order to efficiently utilize the low-grade fuel oil shale and high-sulfur petroleum coke,the coals were mixed with low-grade fuel oil shale and high-sulfur petroleum coke in different proportions.The co-combustion characteristics and mechanism were analyzed by TG-DTG-DSC and Freeman-Carroll method.The combustion characteristics parameter and kinetics parameters were investigated.Results show that the DTG curves of S7 with mass mixing ratio of coal,oil shale and petroleum coke being 1:6:3 present peaks from combustion of released volatile and residual fixed carbon.The sample S4 with mass mixing ratio of coal,oil shale and petroleum coke being 6:3:1 demonstrates greater combustible properties and ignition characteristics index than the values of oil shale and petroleum coke.Burnout indexes of various mixed samples are greater than that of coal and petroleum coke,and synthetic combustion characteristics index of each mixed sample is larger than the synthetic combustion characteristics index of the oil shale.While the activation energy of S4 is minimum,thus the combustion reaction of it is most easily to occur.In summary,mixed combustion characteristics are better than the independent combustion characteristics of oil shale or petroleum coke,which is feasible to solve the difficult of combustion of oil shale and petroleum coke separately.
Keywords：coaloil shalepetroleum cokeco-combustion characteristicskinetics
Publication Date：2017-01-01