Several, including Kiki Barki of coal miner Harum Energy, debut thanks to recent initial public offerings, of which Indonesia was one of the most active markets in Asia.
Unshaped active carbon produced through water steaming method with qualified coal as raw material. The products of these are easy in reproduction and strong against pressing.
以优质煤为原料，用水蒸汽法生产的不定型活性炭，具有一定抗压强度，易再生。
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The active point of the chemical reaction between the coal and the oxygen was researched by using the molecule orbital theory.