Crude coke oven gas contains hydrogen sulphide which is produced from sulphur in the coal. The hydrogen sulphide is removed from the gas sold by passing it through a series of boxes containing solid iron oxide.

• 未处理的焦炉气中含有硫化氢气体,它是由煤中的硫产生的。将待售焦炉气通过装有固体氧化铁的盒子可以除去硫化氢。