...One category is renewable sources, such as biomass, urban waste, and animal residues, and the other category is non-renewable sources, such as underground coal gasification, peat gasification, oil shale gasification, gas from coal seams and geopressured zones, tight sand gas, and Devonian shale gas. Other potential sources of methane include gas hydrates, which are methane that exists in a sherbet-like state under low temperature or high pressure environments in cold regions or on the deep sea floor. Of these, Devonian shale and tight sand gas have a certain level of production experience and are currently being commercialized. ... *Some of the terminology that refers to "gas hydrate" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…一つのカテゴリーは,再生可能な供給源で,バイオマス,都会の廃棄物および動物の残渣(ざんさ)であり,もう一つのカテゴリーは再生不能な供給源で,石炭の地下ガス化,泥炭のガス化,オイルシェールのガス化,炭層からのガスおよび異常高圧帯geopressured zoneのガス,タイトサンド・ガス,デボニアンシェール・ガスである。そのほかメタンの潜在的供給源としては,寒冷地や深海底の低温または高圧力環境下でメタンがシャーベット状で賦存しているガス・ハイドレートがある。このうち現在ある程度の生産の実績をもち,商業化が進められているのは,デボニアン・シェールとタイトサンド・ガスである。… ※「ガス・ハイドレート」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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