Patent ID: 7998236

Claim:
A method for processing a fuel containing hydrocarbons wherein said fuel or a portion thereof is converted to thermal energy while producing a waste gas made up of nitrogen (N 2 ) and carbon dioxide (CO 2 ), comprising the following steps: producing a hot char by devolatilizing said fuel; reacting said waste gas containing said N 2 and said CO 2 with a portion of said hot char to cause the conversion of said CO 2 to carbon monoxide (CO) by using said hot char as a reductant to form a N 2 /2CO gas; adding an oxygen-containing gas to react with the remaining portion of said hot char under suppressed combustion conditions to gasify the carbon (C) in said char to form additional CO which increases the CO content in said N 2 /2CO gas to result in a newly formed N 2 /2CO gas with an increased ratio of CO in relation to N 2 ; cleaning said newly formed N 2 /2CO gas; feeding the cleaned, newly formed N 2 /2CO gas through a solid catalyst to produce a compound of carbon (C) and nitrogen (N 2 ); and feeding said compound of C and N 2 through a liquid catalyst to convert it into a fertilizer.