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Coal
Coal is a combustible black or brownish-black sedimentary rock usually occurring in rock strata in layers or veins called coal beds or coal seams. The harder forms, such as anthracite coal, can be regarded as metamorphic rock because of later exposure to elevated temperature and pressure. Coal is composed primarily of carbon along with variable quantities of other elements, chiefly hydrogen, sulfur, oxygen, and nitrogen.
Industry: Energy
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Coal
液化天然氣 (NGL)
Energy; Coal
作為通過吸收、 冷凝、 吸附、 或氣體處理或迴圈的植物中的其他方法的過程液體氣體分離的天然氣中碳氫化合物。一般這種液體組成的丙烷和重烴類和通常稱為租賃凝析油,天然汽油和液化石油氣體。天然氣液體包括天然煤氣廠液體 (主要乙烷、 丙烷、 丁烷和異丁烷 ; 請參閱液化天然氣廠) 和租賃凝析油 (主要戊烷在租約分隔符號和外地設施天然氣生產 ; 見租約凝析)。 ...