日本每年耗用煤炭约1亿吨,其中70％用于制造炼钢用的焦炭。煤炭经气化转变成CO和H_2,然后再成为合成化学品的“C_1化学”已经实用化。另外,将煤炭直接进行液化提高热利用效率的技术,近年正在积极开发。最近,利用煤炭制取沥青系炭素纤维高级产品的技术也在加速进行。 Japan consumes about 100 million tons of coal each year, of which 70% is used to make coke for steelmaking. Coal has been transformed into CO and H2 by gasification, and then it has become a “C_1 chemistry” for synthetic chemicals. In addition, technologies for directly liquefying coal to improve heat utilization efficiency have been actively developed in recent years. Recently, the use of coal to obtain high-grade products of pitch-based carbon fibers has also accelerated.