Abstract: A method and device which enables an oxygen-free gasification process of both a hydrocarbon-containing (initiation/catalyzing) gas in combination either/both carbonaceous and non-carbonaceous solids and/or liquids or mixture thereof (feedstock material). This is a closed-loop system thus eliminating emissions and preventing environmentally damaging pollution. In one embodiment, a solid feedstock material is utilized, although solids, liquids or slurry may be used. Pulverized solid feedstock martial is first cleansed, dried and then saturated with a hydrocarbon containing gas to displace and remove any air or oxygen from voids in particulate matter. (Liquid feedstock material does not first need to be dried or saturated). The initiation gas is first injected into a high-temperature gasification tube. Simultaneously, gas saturated feedstock material is injected into a feedstock injection tube which openly terminates inside the gasification tube.