Abstract: In a fluidized bed gasification system an ash removal system to reduce the particulate ash to a maximum size or smaller, allow the ash to cool to a temperature lower than the gasifier and remove the ash from the gasifier system. The system consists of a crusher, a container containing level probes and a means for controlling the rotational speed of the crusher based on the level of ash within the container.

Abstract: In a fluidized bed gasification system an ash removal system to reduce the particulate ash to a maximum size or smaller, allow the ash to cool to a temperature lower than the gasifier and remove the ash from the gasifier system. The system consists of a crusher, a container containing level probes and a means for controlling the rotational speed of the crusher based on the level of ash within the container.

Abstract: By catalytic contact with the crystalline alumino-silicate zeolite, mordenite, having a silica to alumina ratio greater than about 15, methanol and/or methyl ethers are catalytically condensed to a mixture of hydrocarbons including polyalkylated aromatic hydrocarbons.

Abstract: The specification discloses conversion of hydrocarbons using, as catalyst, a crystalline zeolite designated ZSM-12. The zeolite has the following composition:1,0 .+-. 0.4 M.sub.2 O . W.sub.2 O . 20-200 YO.sub.2 . ZH.sub.2 Owhere M is at least one cation and n is the valence thereof, W is aluminum or gallium, Y is silicon or germanium, and Z is a value ranging from 0 to 60. In a preferred synthesized form, M is a mixture of alkali metal cations, especially sodium, and tetraalkylammonium cations. These zeolites are characterized by a specified x-ray powder diffraction pattern. Catalytically-active forms of said zeolites are used in a wide variety of hydrocarbon conversion reactions.