Co-pyrolysis characteristics and interaction route between low-rank coals and Shenhua coal direct liquefaction residue

Publication date: Available online 22 April 2019Source: Chinese Journal of Chemical EngineeringAuthor(s): Kai Li, Xiaoxun Ma, Ruiyu He, Zhenni LiAbstractTo reasonably utilize the coal direct liquefaction residue (DLR), contrasting research on the co-pyrolysis between different low-rank coals and DLR was investigated using a TGA coupled with an FT-IR spectrophotometer and a fixed-bed reactor. GC–MS, FTIR, and XRD were used to explore the reaction mechanisms of the various co-pyrolysis processes. Based on the TGA results, it was confirmed that the tetrahydrofuran insoluble fraction of DLR helped to catalyze the conversion reaction of lignite. Also, the addition of DLR improved the yield of tar in the fixed-bed, with altering the composition of the tar. Moreover, a kinetic analysis during the co-pyrolysis was conducted using a distributed activation energy model. The co-pyrolysis reactions showed a approximate double-Gaussian distribution.

Source: Chinese Journal of Chemical Engineering - April 23, 2019 Category: Chemistry Source Type: research