著者

崎元 尚土 島田 荘平 大賀 光太郎 熊谷 治夫 山田 理 海保 守 安田 肇

出版者

The Mining and Materials Processing Institute of Japan

雑誌

Journal of MMIJ : journal of the Mining and Materials Processing Institute of Japan (ISSN:18816118)

巻号頁・発行日

vol.126, no.10, pp.608-613, 2010-09-25

被引用文献数

1

---

CO<SUB>2</SUB> sorption on coal was estimated by two experiments, one is heat of sorption measurement and the other is <SUP>1</SUP>H-NMR measurement. In the heat of sorption measurement, differential heat of sorption (<I>q<SUB>d</SUB></I>) was compared with the calculated one. Measured <I>q<SUB>d</SUB></I> was same value with calculated one at low pressure. It decreased gradually with pressure and became lower than the calculated one. Since it couldn't be explained by the theory based on physisorption, it is estimated that the coal-CO<SUB>2</SUB> system could not be explained by only simple physisorption.<BR>In <SUP>1</SUP>H-NMR measurement, spin-spin relaxation time (<I>T</I><SUB>2</SUB>) and composition fractions of L<SUB>1</SUB>, L<SUB>2</SUB> and G were measured. Composition fractions and <I>T</I><SUB>2</SUB> of L<SUB>1</SUB> increased with CO<SUB>2</SUB> gas pressure. Furthermore, the correlation was observed between volume increments and dissolution amount at over 10 atm. It indicates that part of CO<SUB>2</SUB> sorption capacity was used to coal relaxation.