A.
分离和过滤Separation and filtration
B.
冷凝分离Condensation separation
C.
固体吸附法: 物理或化学吸附Solid adsorption: physical or chemical adsorption
D.
液体吸收法: 物理或化学吸收Liquid absorption: physical or chemical absorption
E.
直接转化法Direct conversion
F.
综合法comprehensive method