Methods for absorbing a targeted compound from a gas stream for subsequent processing or use

A method for removing a chemical compound from a waste gas stream to prepare the waste gas stream for further processing, comprising:

• feeding a waste gas stream to a gas/liquid contactor, wherein the waste gas stream comprises a targeted chemical compound to be removed from the waste gas stream;
• and
• absorbing the targeted chemical compound from the waste gas stream into a scrubbing solution in the gas/liquid contactor, thereby producing an exit gas stream from the gas/liquid contactor;
• wherein said absorbing is performed prior to any condensing of the waste gas stream;
• condensing the exit gas stream from the gas/liquid contactor to produce a condensed gas stream for further processing;
• after said condensing, optionally combining a second waste gas stream comprising the targeted chemical compound with the condensed gas stream;
• removing a portion of solid matter from the condensed gas stream;
• after said removing, scrubbing the condensed gas stream with an alkaline scrubbing solution to remove a portion of an acidic gaseous compound from the condensed gas stream;
• after said scrubbing the condensed gas stream with the alkaline scrubbing solution, scrubbing the condensed gas stream with an acidic scrubbing solution to remove a portion of any of the targeted chemical compound in the condensed gas stream;
• and
• after said scrubbing the condensed gas stream with an acidic scrubbing solution, discharging the condensed gas stream.