Patent ID: 8915990

Claim:
A method for refining a feed gas comprising hydrocarbons and hydrogen sulfide having a first concentration of hydrogen sulfide, comprising: producing a stream of a first processed feed gas, and producing a second stream of a second processed feed gas from the stream of the first processed feed gas, using a separation process for H 2 S removal by a cyclonic separator, wherein the cyclonic separator comprises a first inlet, a second inlet and is arranged for receiving at the first inlet the stream of first processed feed gas, receiving at a distal end of the second inlet a flow of additive component, the additive component being a solvent for hydrogen sulfide, spraying from the second inlet the flow of additive component into the first processed feed gas stream so as to form a mixture of sprayed additive and first processed feed gas, creating at a first outlet a first flow of the second processed feed gas and at a second outlet a second flow of substantially hydrogen sulfide containing liquid, the second processed feed gas having a second concentration of hydrogen sulfide, the second concentration being relatively lower than the concentration of hydrogen sulfide of the first processed feed gas, received at the first inlet, and wherein the additive component is a non-aqueous fluid which comprises as constituent one or more of the following chemical groups, i.e., an alcohol (e.g. methanol, ethanol), a diol, (e.g. ethylene glycol, dimethyl ether of polyethylene glycol), an ionic liquid, a dipolar aprotic solvent (e.g. Sulpholane).