抄録
Hyper-coal is an ash-free coal produced by the solvent de-ashing technology. Coal is thermally (360-420 °C) extracted into the coal-derived solvent. HPC has excellent thermoplasticity and large potential for coke additive to make a strong coke. The yield of Hyper-coal depends on the coal solubility. Therefore, it is important for Hyper-coal process to optimize extraction condition to increase extraction yield. In previous research, we researched the effect of heating rate by bath test (500cc scale autoclave) and that the extraction yield was increased with increasing heating rate.
We are developing Hyper-coal process by using bench scale units (BSU) to acquire the process design data. In conventional method, after coal and solvent are mixed, the slurry is heated to the temperature of extraction (380 °C). In this method, the heating rate is approximately 100 °C /min. In order to increase the heating rate, BSU was remodeled that is able to mix the coal slurry and high temperature solvent in extractor. In this method, we study the extraction yield and material balance of effect of rapid heating extraction.
