The effects of the feed rate of air, steam and coal on bed temperature, gas composition, calorific value, carbon conversion and gasification efficiency are predicted and analyzed with the model.

在此基础上，还就空气加入量、蒸汽加入量及加煤速率对床温、煤气组成、煤气热值、碳转化率和气化效率的影响做了预测和分析。

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Comparisons of the gas composition of the samples from the coal seams liable and not liable to outburst in several major coal fields have been made.

比较了几个主要突出矿区突出危险煤层与非突出危险煤层煤样的瓦斯成分。

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This paper describes the method for measuring gas content and gas composition in coal samples obtained underground.

本文介绍了从井下采取的煤样中瓦斯含量及瓦斯成分的测定技术。

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Those carbon dioxide levels, in fact, have been dropping in the United States because of evolutions in the composition of electric generation from coal to natural gas, predicated on price structure and federal regulations.

FORBES: Lobbyists Try to Halt State Green Energy Standards