Both coal gangue and coal bed methane are low heating value fuels.

煤矸石和含甲烷量较低的煤层气均属于低热值的燃料。

Variations of the process enable production of high purity hydrogen, methanol, ammonia, methane or low heating value gas.

此过程的演变工艺可以生产高纯度氢气、甲醇、氨、甲烷或低热值气体。

As a result of low heating value and unsteady component, ignition and combustion of Municipal Solid Waste (MSW) are difficult using conventional methods.

我国城市垃圾有热值低、成分不稳定等特点，因而按常规方法不易点火和稳定燃烧。