The Fischer–Tropsch process is a catalyzed chemical reaction in which synthesis gas (a mixture of carbon monoxide and hydrogen) is converted into liquid hydrocarbons. The most common catalysts are based on compounds of cobalt or iron. This process is to produce a synthetic petroleum substitute for use as lubrication oil or fuel. It was patented during the 1920s and used by Germany and Japan during the WWII to supplement their fuel needs.
I really doubt that BEHL is using this process. They might ultimately produce the biomass that could be gasified. Better to use lower value carbon source for the synthesis gas. Algae, after lipid removal is a very high in protein--potentially high value for animal feed. I suspect that Magnegas is using some form of the Fischer-Topsch synthesis for its products.