CO-PYROLYSIS KINETIC，THERMODYNAMIC AND FAST PYROLYSIS PRODUCT CHARACTERASTICS OF LONG FLAME COAL AND FURFURAL RESIDUE

The co-pyrolysis characteristics of furfural residue and low-rank long-flame coal were systematically investigated. Using thermogravimetric analyzer（TG）and infrared fast pyrolysis reactor，the effect of heating rate on the co-pyrolysis product distribution of furfural residue and long-flame coal and the synergistic effect between them were researched. TG results show that the interaction between cellulose in furfural residue and carbon-containing organic components produced by pyrolysis of long flame coal occurs in the pyrolysis range of 300~600 ° C. The activation energies calculated by KAS and FWO are 69.80~256.04 kJ/mol and 71.24~253.43 kJ/ mol，respectively. At 20，30 and 40 °C/min，the average pre-exponential factor is 1.53×1013/min（KAS）and 2.53×1013/min（FWO）. The co-pyrolysis results show that：when the heating rate increases from 10 ° C/s to 30 ° C/s，the tar yield first increases from 8.67% to 9.24%，then decreases to 8.3%，the water yield decreases from 15.92% to 14.73% and then increases to 15.26%，the gas yield increases from 25.12% to 26.66% and the char yield decreases from 50.29% to 49.78%. Simulated distillation results suggest that the content of light components in tar is approximately 70%，while the proportion of heavy components is relatively small，due to the fact that the co-pyrolysis of furfural residue and long flame coal under rapid infrared heating is advantageous for tar upgrading and generates positive synergy. © 2024 Science Press. All rights reserved.