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

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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.

著者

島田 荘平 藤沢 義郎 松田 範之

出版者

一般社団法人 資源・素材学会

雑誌

資源と素材 (ISSN:09161740)

巻号頁・発行日

vol.112, no.7, pp.429-438, 1996-06-25 (Released:2011-01-27)

参考文献数

44

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Due to the import of cheap primary energy resources, the German domestic coal mining industry is forced to rationalize the organization and to reduce the production cost. Though the economical situation is stil severe, the new R & Ds and the improvement of practical technologies have been continued in a limited budget range. Many of them are remarkable technolgies to overcome the severe underground mining conditions and to increase productivity and to improve safety performance.This report summarizes the recent R & Ds and practical technologies developed in German coal mining industries. It includes technologies on coal cutting, roadway drivage, material and man transportation, roadway maintenance, safety devices, utilization of mined-out space and safety management. The tndency of these technologies is described in conclusion.

著者

島田 荘平

出版者

The Mining and Materials Processing Institute of Japan

雑誌

資源と素材 : 資源・素材学会誌 : journal of the Mining and Materials Processing Institute of Japan (ISSN:09161740)

巻号頁・発行日

vol.117, no.12, pp.923-930, 2001-12-25

被引用文献数

4 6

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There are many types of geological formations used for CO₂ sequestration. Coal seam is one of them. The characteristics of the coal seam used for CO₂ sequestration are the methane recovery when CO₂ is sequestrated. CO₂ is injected into coal seam not only for the CO₂ sequestration but also for CH₄ recovery (ECBMR).<BR>This paper reports the sequestration mechanism of CO₂ in the coal seam and the world R&D status in this field.<BR>The adsorption is a main sequestration mechanism of CO₂ in the coal seam. In the field scale sequestration, pressure of CO₂ is super-critical. The adsorption volume of CO₂ in coal in that condition is not yet clarified. This adsorption volume is very important for the prediction of sequestrable CO₂ volume.<BR>The present activities on this subject in the United States, Canada, Australia, Netherlands and Japan were reported. For the further studies, the international cooperative R&Ds are necessary. Items for the further R&Ds are summarized.

著者

朴 洗憲 山崎 哲生 島田 荘平 山本 恭久

出版者

The Mining and Materials Processing Institute of Japan

雑誌

資源と素材 : 資源・素材学会誌 : journal of the Mining and Materials Processing Institute of Japan (ISSN:09161740)

巻号頁・発行日

vol.118, no.10, pp.641-649, 2002-11-25

参考文献数

48

被引用文献数

3 3

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Cobalt-rich manganese crusts on seamounts and manganese nodules on deep ocean floor have both been received attention as future resources for Co, Ni, Cu, and Mn. Lack of information on cobalt-rich manganese crusts has precluded comparisons between the two sources in terms of their technical and economical advantages. In the past 15 years, Japan has surveyed the cobalt-rich manganese crusts; therefore, it seems the proper time to compare the two. In this paper, we consider distribution features and R&D results to develop a method for examining and comparing the economical potentials of manganese nodule and cobalt-rich manganese crust mining. Through the preliminary evaluation of the two, the effectiveness of the method is confirmed. <BR>Cobalt-rich manganese crust development seems a risky but high return venture because of its high sensitivity to cobalt prices. Manganese nodule development, on the other hand, is considered to be a stable and good for a long-term venture. One of the application fields will be the selection of suitable metallurgical processing. A lower substrate ratio in excavated ore is clearly required for the economy of the crust development. In order to improve the evaluation, detailed technical information for the recovery efficiencies in the subsystems and units is necessary.