A method for treating gases to be scrubbed, comprising filling a scrubber with a volume of lean liquid adequate to cover a sintered permeable membrane in the reaction chamber and a bit more to create a reaction zone in not only a plurality of pores in the membrane with gases but in a reaction zone above the membrane, then introducing gases to be scrubbed to the membrane, building up pressure in the reaction chamber, and passing scrubbed gas from the reaction zone to an exit port at a rate equal to the rate of gases to be scrubbed are introduced.