The Relation between Gas in Coal Seams and Artificial Coalification Gas Under Hydrothermal Pressure Systems

Extensive studies have been carried out on the genetic chemical reaction of coals by many famous researchers. Some of the previous studies are as follows: H. Potonei[1] initiated the study of coalification. F. Fischer, et. al.[2] supported the origin of lignin theory. F. Bergins[3], Erasmus[4] and R. V. Wheeler, et. al.[5] supported the cellulose theory. Tropsch[6], Berl and Schmit[7], Horn and Sustsmann[8] and Fuch and Horn[9] developed the systematic investigation on artificial coalification. Berl and Schmidt[10] experiments on coalification were checked and confirmed by Schuhmacher and Van Krevelen[11]. Two researches on this topic were studied in our country. W. Funasaka and C. Yokokawa[12] discussed the relationship between the genetic origin of coal and its chemical properties at atmospheric conditions by artificial coalification experiments. T. Yamazaki and R. Abe[13] reported the experimental results of the gas evolutions from raw coal during the artificial coalification process following the procedure presented by C. Yakakawa.