Abstract
A two-stage process has been investigated for the production of a low-sulfur solid SRC-I type boiler fuel with a minimum consumption of costly hydrogen. The process employs a coal mineral with scavenging action in the first stage dissolver, followed by second stage hydrotreating of the dissolver effluent. This paper reports a detailed investigation of second-stage hydrotreating conditions designed to optimize the process with respect to maximum sulfur removal with minimum hydrogen consumption. The process variable space is experimentally mapped and modeled using appropriate reaction kinetic expressions. This model is then used to select optimum conditions for operation of the second-stage hydrotreating process for the production of a low-sulfur solid SRC product with minimum hydrogen consumption.
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