High oil price brings opportunities for development of coal-based energy resource technology in China(part 1)

China's main source of energy is coal,and there is a conflict existing between the demand and the supply of petroleum and relevant products.To transform coal to liquid to partially replace petroleum,and build the system of coal-based liquid energy source is an important developing direction in China.The coal liquefaction technologies includes the followings:direct coal liquefaction,indirect coal liquefaction,united hydrocraking for coal tar oil,combined fuel of coal tar oil and fuel oil,emulsive fuel,coal-water slurry,oil-coal-water slurry and coal tar pitch fuel,etc.The general situation of technological development and typical processes of coal liquefaction are emphatically discussed in this paper.And a technical analysis and comparison between the two kinds of liquefaction processes are made,and their advantages and disadvantages,the research advances and developing trend in China pointed out.Some advice about developing coal-based liquid energy source is also given.