System and method for combustion of non-gaseous fuels and derivatives thereof

A power production plant comprising:

• a gasifier configured for receiving a solid fuel and providing a gaseous fuel;
• a combustor configured for receiving the gaseous fuel, an oxidant, and a diluent, and outputting a combustor exhaust stream;
• and
• a turbine configured to receive the combustor exhaust stream;
• wherein:
• the combustor includes an outer casing and a combustor liner defining a combustion chamber therein, the combustor liner comprising a plurality of longitudinally-extending reinforcing rib members engaged with an outer surface of the combustor liner and extending toward the outer casing, wherein adjacent rib members and the outer surface of the combustor liner define a plurality of cooling channels along the outer surface of the combustor liner, the plurality of cooling channels being configured to receive a flow of any one or more of the fuel, the oxidant, and the diluent thereagainst prior to being received by the combustion chamber to thereby provide for cooling of the combustor liner;
• the combustor liner comprises one or more openings defined therein and adapted for passage therethrough of the oxidant into the combustion chamber;
• the combustor liner comprises one or more openings defined therein and adapted for passage therethrough of the diluent into the combustion chamber;
• and
• the combustor includes a wall comprising a longitudinally extending portion, the longitudinal extending portion of the wall positioned between the combustor liner and the outer casing, the wall being effective to allow only oxidant to flow along an upstream portion of the combustor liner and allow only diluent to flow along a downstream portion of the combustor liner.