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Co-pyrolysis of lignite with direct coal liquefaction residue (DCLR) is a promising method in the field of clean coal technology. To investigate the influence of DCLR fraction on the physico-chemical structure and combustion reactivity of the co-pyrolysis chars, char samples with different mass fraction of lignite and DCLR were prepared in a quartz tube fixed-bed reactor at 550°C. Then the physico-chemical...
Low-temperature pyrolysis could effectively recover heavy oil from direct coal liquefaction residue (DCLR), and the derived DCLR char (DCLRCH) could be gasified to compensate hydrogen consumption during liquefaction. The staged processing of DCLR, pyrolysis and gasification, is thought to be a promising method for its high-efficient usage. In the work, DCLR was pyrolyzed under different pyrolysis...
Direct coal liquefaction residue (DCLR) is a main byproduct in direct coal liquefaction process and its clean and high-efficient utilization is important. If DCLR could be gasified for hydrogen production, it will compensate hydrogen consumption during liquefaction and lower the operation cost, which makes DCLR utilization more promising. We proposed to blend DCLR with low-rank coals to prepare DCLR–coal–water...
The transformation behavior of mineral matters in direct coal liquefaction residue from Shenhua Corporation under gasification atmosphere at high temperatures was examined by X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR). Mössbauer spectroscopy was also applied to investigate the iron-bearing minerals and the valence distribution of iron in ash at different temperatures...
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