Patent ID: 8858900

Claim:
A system for converting carbonaceous waste into energy comprising: (a) a rotary kiln for converting a carbonaceous waste in the presence of steam and CO 2 to synthesis gas having an inlet for the waste, an outlet for the synthesis gas and a solids exit between said inlet and said outlet and containing a primary region having an auger to move the waste therethrough, and a second region for steam/CO 2 reforming of the off-gases generated in the primary region to the synthesis gas; (b) an exothermic chemical reactor for converting at least a portion of the synthesis gas from said rotary kiln to steam, a carbon-sequestering product, and an exhaust gas stream, and having a gas inlet in fluid communication with the synthesis gas from said kiln, and an exit for said steam and an exit for said carbon-sequestering product; and (c) recycle line for recycling the exhaust gas stream containing hydrogen, CO and greenhouse gases selected from the group consisting of CHsub4, CO 2 and mixtures thereof from said exothermic reactor to the inlet of said kiln.