Patent ID: 8888876
Filing Date: 2014-11-18
Classification: C01B,C10J,C10K,Y02P

Abstract:
1. A process for gasification of a carbonaceous material, comprising the steps of: a. introducing recycled char into a reactor lower section and partially combusting said recycled char therein with a stream comprising an oxygen-containing gas, steam or mixtures thereof, thereby evolving heat and forming mixture products comprising synthesis gas and molten slag; b. passing said synthesis gas from said reactor lower section upward into a reactor upper section and pyrolysing therein with a stream comprising a slurry of particulate carbonaceous material in a liquid carrier thereby forming mixture products comprising i) a gaseous product stream comprising synthesis gas and residual tar, ii) char, and iii) vapor, wherein said reactor upper section is maintained at a temperature in a range of 450° F.-1400° F.; c. passing said mixture products from said reactor upper section through a separation device, wherein said char is separated from said mixture products from said reactor upper section and introduced to said reactor lower section as said recycled char of step a), wherein said recycled char is dry and is the only feedstock introduced to said reactor lower section; and d. introducing said gaseous product stream from said reactor upper section comprising synthesis gas and residual tar into a reaction zone, where said residual tar is removed, wherein said heat evolved in said step (a) is recovered by converting said slurry of particulate carbonaceous material and said liquid carrier in step (b) into said gaseous product stream in step (b).