Abstract
Coal Hydrogenation under high pressure has been studied for the purpose of producing aromatic chemicals from coal, by using autoclaves of batch-type and a small-scale continuous apparatus in the, Fuel Research Laboratory, Engineering Faculty of Hokkaido University since 1956.
In this paper, essentials of the experimental results have been reported according to the following research items,
1) Studies on the relation between hydrogenated oils from various kinds of Japanese coal, such as brown coal, non-caking sub-bituminous coal and caking bituminous coal, aud structural characteristics of sample coals as revealed by Krevelen's structural analysis, , together with chemical and infra-red spectral analyses of oxygencontaining groups of sample coals.
2) Studies on the applied reaction kinetics of liquid phase coal hydrogenation.This item includes (a) the measurement of numerical values of the reaction rate in coal hydrogenation, expressed as the rate of decrease of benzene-insoluble unreacted coal, covering a wide range of the reachion conditions, (b) analysis of the feature of “mixing” which could occur in a model reactor of liquid-column type, agitated by gas bubbles, and (c) the heat of reaction in coal hydrogenation, by using an apparatus designed for a differential thermal analysis of coal hydrogenation under pressure.
An example of analysis of the reactor of coal hydrogenation is shown for a rational decision of reaction time and reaction volume.
3) Studies on continuous liquid phase coal hydrogenation by using an apparatus, capableof treating 8l of coal paste per hour.An example of analyses of hydrogenated oils (acidic, basic and hydrocarbon oils) is shown.Preparation of coal paste and stable operation of the continuous reactor have been also studied.
4) Analysis of composition of hydrogenated oils boiling above 300°C, produced by a batch-type autoclave.
