Synthesis combustible carrier

In the CASST process (see figure I) bitemperature pyrolysis at 350-400°C, into volatiles and charcoal. The diarcoal is gasified with steam at about 00-900°C to produce fiiel or synthesis gas. The volatiles are combusted with air at 1000-1100°C to supply the heat required for the endothermic gasification step. A circulating inert heat carrier, e.g. sand, transports the heat between the combustion and the gasification step. 

Precaution Combustible Hazardous Decomp. Prods. Heated to decomp., emits acrid smoke and irritating fumes Uses Organic synthesis carrier for polyester/wool blended fabrics insecticides fragrance in cosmetics Manuf./Distrib. Aldrich http //www.sigma-aidrich.com] Allchem Ind. http //www.aiichem.com] Coyne http //www.coynechemicai.com] Crowley Tar Prods. Fluka http //www.sigma-aidrich.com Koch Chem. Spec. 

Tian H, Simonyi T, Poston J, Siriwardane R. Effect of hydrogen sulfide on chemical looping combustion of coal-derived synthesis gas over bentonite-supported metal-oxide oxygen carriers. Ind Eng Chem Res 2009 48 8418. 

The generic apparatus used in a vapor precursor process is very similar to that used in spray pyrolysis, except that the precursor material is introduced to the reactor as a vapor (see Figure 2.1, 2. la). If the precursor is a liquid, carrier gas is typically bubbled through it. If the precursor is a solid, then the carrier gas is often passed through a heated, packed bed of the material. The vapor-laden carrier gas then flows to a furnace reactor, where thermal decomposition of the precursor occurs and particle formation results. Product powder is collected or measured at the reactor outlet. Flame processes also fall into the vapor precursor/thermal decomposition category of gas-phase powder synthesis. The only difference is that the thermal energy is provided by combustion as opposed to an external source. 

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