The gas is treated successively by chemical absorption desulfuration, high pressure adsorption and vacuum desorption, reclaiming hydrogen of purity 99.9%.

• 富氢干气先用化学吸收法进行脱硫处理；再用高压吸附、低压抽真空解吸；从含粗氢的干气中提纯出99.；9%25(体积分数)的氢气。