Research on Pyrolysis Kinetics of Shenhua Coal and Direct Liquefaction Residue

Abstract

The pyrolysis tests of Shenhua coal and Shenhua direct liquefaction residue have been carried out using thermogravimetric at the differential heating rate. The kinetic parameters k and E were calculated using DAEM method. Results show DAME model can describe the pyrolysis behavior of Shenhua coal within the range of 20% to 95%, the activation energy of coal pyrolysis ranges from 53.98 to 279.38 kJ/mol, and DAME model can describe the behavior of Shenhua direct liquefaction residue within the range of 10% to 80%, the activation energy of residue pyrolysis is about 170 kJ/mol. The results of which are basically consistent with the experimental data.

Co-pyrolysis of lignite and Shendong coal direct liquefaction residue

“…That is to say, AAME in DLR did not contribute to the interaction during co-pyrolysis. Moreover, this result was essentially in agreement with the work of Chu et al [6]. However, they used DLR and HCl-HF-washed DLR in a thermogravimetric analyzer whereas this experiment was done with THFIS/THFS with lignite in a fixed bed reactor.…”

“…(5) The effect of mass blending ratios of DLR (0.425-0.85 mm) in co-pyrolysis at 550°C were investigated. (6) To clarify the source of interaction during co-pyrolysis, DLR was extracted with tetrahydrofuran (THF) in Soxhlet apparatus as commonly found in the literature [5]. The THF soluble and THF insoluble fractions obtained are defined as THFS and THFIS, respectively.…”

“…Nevertheless, the results demonstrated that the distinct weight loss of DLR was nearly consistent with that of lignite. Considering the heat transfer hysteresis effect at the laboratory scale [6] and to produce the highest amount of tar, the pyrolysis temperature range in the fixed reactor was chosen from 500 to 600°C.…”

Effect of Swelling by Organic Solvent on Structure, Pyrolysis, and Methanol Extraction Performance of Hefeng Bituminous Coal

“…In the higher temperature region, condensation reactions might be occurred, and the semi-coke could be converted to form coke with the release of some small gaseous molecules, the process of which demands less energy (showing lower activation energy). Additionally, the pre-exponential factor of each swollen coal shows a change order consistent with the activation energy, indicating that there is a compensation relationship between the factor and the activation energy …”

“…Additionally, the pre-exponential factor of each swollen coal shows a change order consistent with the activation energy, indicating that there is a compensation relationship between the factor and the activation energy. 40 2.6. Extracts.…”