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ENGINEERING EVALUATION OF CONTROL TECHNOLOGY FOR H-COAL AND EXXON DONOR SOLVENT PROCESSES
Citation:
Sarna, K. AND D. O'Leary. ENGINEERING EVALUATION OF CONTROL TECHNOLOGY FOR H-COAL AND EXXON DONOR SOLVENT PROCESSES. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/7-79/168.
Description:
The report gives results of an evaluation of the control technology of two coal liquefaction processes, H-Coal and Exxon Donor Solvent. The effluent streams were characterized and quantified for both processes and plants (pilot and conceptualized commercial). The gaseous-, liquid-, and solid-stream emissions were analyzed for their controllability, process complexity, and efficiency. Extrapolations to the larger commercial size were based partly on pilot plant data and (where such data was unavailable) engineering judgment. Several information gaps were encountered for liquid and solid effluent streams, especially as to composition. These deficiencies were pointed out and recommendations were outlined. Present control technology for the H-Coal process seems to be barely adequate: present designs are inadequate for zero discharge criteria. Control technology for the EDS process depends on being able to rely on the facilities of an adjacent refinery's controls: the scalability of present control technologies, especially in the case of the bag filter operation, is not confirmed.