コークス用石炭資源拡大を目的とした褐炭の改質(<特集>資源制約に対応するコークス製造技術)

概要

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Coal is said to be coming back under the situations of rapid increase of energy consumption in Asian countries, rapid increase of oil price, and growing nationalism for securing of energy resources. Under such situations, Japanese steel industries, which are importing all coal resources required, are facing the necessity of increasing usable coal resources. They are to increase the kinds and amounts of usable coal and to develop the technologies for upgrading low rank coals such as subbituminous coal and brown coal into coking coal substitutes. In this report the methods being developed by the authors for upgrading brown coal are briefly introduced. The methods involve the fractionation of brown coal using sequential thermal solvent extraction, dewatering and upgrading of brown coal using hydrothermal treatment, and co-pyrolysis of upgraded brown coal and plastic derived wax. It is shown that these methods enable to produce binders for cokemaking and substitute of slightly/noncaking coal.
一般社団法人日本エネルギー学会の論文
2008-05-20