Thermodynamic study on a novel lignite poly-generation system of electricity-gas-tar integrated with pre-drying and pyrolysis

Effect of hydrogen-rich gas from char gasification on rapid pyrolysis products of low rank coal in a downer pyrolyzer

“…These processes can generally produce multiple products such as tar, coal gas, and power with high energy efficiency and low emissions of pollutants, and realize the hierarchical utilization of low-rank coal. [8][9][10] However, the tar generated from the processes usually contains higher pitch content due to the low hydrogen-carbon molar ratio of coal and uncontrolled secondary reaction of volatiles on heat carrier particles. 11 Also, the intense mixing between cold coal and hot solid heat carrier in the reactor generates a great deal of dust.…”

Theoretical Evaluation and Case Analysis on a Solar-Driven Lignite Drying System Coupled with Pyrolysis and Gasification

“…Lignite upgrading technologies, including drying, pyrolysis and gasification are effective to improve lignite utilization efficiency. Therefore, many researches were conducted on the lignite drying [2][3][4] , pyrolysis [5,6] and gasification [7] technologies. However, these technologies are isolatedly used.…”