Moreover, JGC is conducting research and development on practical devices for new power generation systems, including electric power generating utilizing sludge digestive gas and a fuel cell. In doing so, JGC is continuing its tradition of offering its clients the most advanced technology. With needs for diversified energy sources growing, effective use of coal is increasingly spotlighted. A problem with coal, however, is the difficulty of transportation and storage. One method for solving this problem is the liquefaction of coal.
Liquefaction calls for coal to be pulverized into fine particles and then mixed with water.
Chemical additives are dosed so that coal particles mixed with water can be liquefied into slurry. CWM can be handled like heavy oil. JGC has been involved in the research and development of CWM production technology for a number of years and has successfully realized a high concentration slurry, with an approximate ratio of coal to water of 7 to 3. According to optimum particle size distribution, the density of coal can be increased. By adding a very small quantity of a surfactant, particles are prevented from coagulating or subsiding, and CWM liquidity is increased.