What method can remove hydrogen sulphide (H2S) from natural gas?

 by absorption, the absorbed hydrogen sulfide is partially converted to sulfur as in a claus plant and the residual hydrogen sulfide in the tail gas is concentrated by adsorption and recycled into the absorption stage at higher concentration such that all the hydrogen sulfide is removed from the gas stream as sulfur, thus eliminating atmospheric pollution which normally results from release of hydrogen sulfide containing tail gas.