The results indicated that the trace elements molybdenum and zirconium increased considerably the gas yields of the lignitic organic matter while selenium did not.

分析结果表明，除硒元素外，随着钼元素和锆元素的加入，褐煤有机质气态产物的生成量显著提高。

This paper analyzed moisture stand-by condition and its de-watering feature of lignitic coal, and based on principle of air flow drying, design and developed straight-tube air dryer.

阐述了褐煤干燥加工的意义及对洁净煤技术发展的影响，分析了褐煤水分的赋存状态及脱除特性，并根据气流干燥的原理，开发设计了直管式气流干燥器试验装置。