Patent ID: 9291083
Filing Date: 2016-03-22
CPC Classification: B01D,F01N,Y02C

Claim Text:
1. A method for reducing the concentration of a target emission gas (TEG) from a source of engine exhaust gas comprising the steps of: directing said engine exhaust gas from the source into an enclosed space containing at least one array of hollow fiber semi-permeable ceramic membranes, wherein said exhaust gas contacts an exterior surface of said membranes whereupon TEG within said exhaust gas permeates through said membrane thereby lowering the concentration of said TEG within said exhaust gas; circulating a carrier liquid capable of retaining TEG compounds through bores of said hollow fiber ceramic membranes thereby elevating the concentration of said TEG compounds within said carrier liquid, wherein said carrier liquid is a basic solution and said TEG compounds comprise an acid which is neutralized by said carrier liquid when contacted thereby; discharging said exhaust gas containing a reduced TEG concentration from the enclosed space and removing said carrier liquid containing said TEG compounds therein from said hollow fiber ceramic membrane array for discharge or recycling; and precipitating said TEG compounds from said carrier liquid in the form of a precipitate and recycling said carrier liquid through said membranes.