Influence of Heating up Rate to Reaction Temperature and the Initial Reaction Rate in Coal Hydrogenolysis

概要

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In high pressure coal hydrogenolysis the red mud catalyst promotive effect was enhanced by an addition of sulfur. The additional effect was investigated quantitatively and it was foud that reaction rate constant showed a 2.5 fold increase in the first step while a slight increase was seen in the second step.<BR>A new prssure feed-in apparatus was designed by which coal paste can be inserted within 5 seconds into a conventional autoclave maintained at reaction condition (400 or 450°C, 230kg/cm<SUP>2</SUP>) and the high pressure hydrogenolysis reaction rate of coal in the presence of red mud-sulfur catalyst was measured. When the obtained values were compared against the reaction rate constant obtained in a conventional batch type experiment under conditions of slow heating up rate of 4C or thereabouts, the results showed a fairly good agreement. At the same time no great difference was seen in the reaction product distribution between both cases.<BR>Based on the above it may be surmized that by selecting appropriate experimental conditions, basic data measured in the conventional manner in a batch type autoclave may be applied to a flow system in which a rapid heating up rate is utilized.
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