Gasoline, from methanol

By selection of appropriate operating conditions, the proportion of coproduced methanol and dimethyl ether can be varied over a wide range. The process is attractive as a method to enhance production of Hquid fuel from CO-rich synthesis gas. Dimethyl ether potentially can be used as a starting material for oxygenated hydrocarbons such as methyl acetate and higher ethers suitable for use in reformulated gasoline. Also, dimethyl ether is an intermediate in the Mobil MTG process for production of gasoline from methanol. 

The MTG process will soon see its first commercial application in a plant currently being constructed for the New Zealand Synthetic Fuels Corporation Limited. This plant, scheduled for completion in 1985, will produce gasoline from methanol derived from New Zealand natural gas. It will produce some 570,000 tonnes per year (14,000 BPSD) of unleaded gasoline averaging 92 to 94 research octane. This is equivalent to about 1/3 of New Zealand s gasoline consumption. Two 2,200 tonnes per-day methanol plants will provide the feed for the single-train MTG plant. 

Gasoline from Methanol. Mobil has developed a process, now in the pilot plant stage, which dehydrates methanol to gasoline producing a 93 research octane gasoline. 

Gasoline from methanol process (Mobil) Zeolite... 

The production of gasoline from methanol is a parallel process to the Fischer-Tropsch synthesis of hydrocarbons from syngas (Section 4.7.2). A shape-selective zeolite (ZSM-5) was the catalyst of choice in the process put on stream in 1987 by Mobil in New Zealand however the plant was later closed. The zeolite was used at ca. 400°C in a fluid catalyst reactor, which allows prompt removal of the heat of reaction. 

This performance has enabled Mobil to develop a direct process for gasoline from methanol. The mechanisms of these reactions, especially the early stages, are not fully understood. Chang and Silvestri showed that the molecular sequence for the overall reaction is... 

There are over 70 known different kinds of building arrangements, each resulting in a distinct structure. Some ofthese occur as natural minerals some are synthetic. The search for new combinations goes on. Catalytically important zeolites are listed in Table 4.11. More details on exact structures will be found in the references.In recent years, much attention has been directed toward a new zeolite, ZSM 5, whose structure is shown in Fig. 4.24. This is a zeolite with openings of 0.S4 0.56 nm, intermediate between the zeolite A (0.4 nm) and faujasite X and Y (0.74 nm). It has been successfully applied to the production of gasoline from methanol and for other specialized purposes. ... 

Gasoline from methanol ZSM-5 Produces methanol from coal, natural gas, or biomass and then converts it into hquid fuel Conservation of crude oil, elimination of many waste streams... 

A synthetic gasoline project to produce 500-600,000 tonnes per annum of gasoline from methanol produced from natural gas using a process developed by the Mobil Oil Corporation ... 

The role of catalysis in the petroleum industry has been equally revolutionary. Meta I-supported systems (e.g. of Topsoe and Shell) for catalytic reforming, hydrodesulfurization and hydrodenitrification, alkylation catalysts and shape selective systems (e.g. zeolites and pillared clays) for catalytic cracking (FCC) and production of gasoline from methanol (Mobil MTG) all represent significant technical and commercial achievements. 

Gasoline from methanol CH3OH gasoline -1- HjO ZSM 5 zeolite H... 

Daviduk, J., Method for producing gasoline from methanol, U.S. Patent 3,998,899 (1976). 

The methanol to gasoline (MTG) process uses ZSM-5 to produce good-quality gasoline from methanol. The process can be tuned to yield alkenes for polymer production instead, if these are required. The first plant incorporating MTG technology came on stream in New Zealand in 1986. The overall equation for this process is simple ... 

In this case, the process for the production of gasoline from methanol is considered. One of the critical problem in the development of this process is the deactivation of the zeolite catalyst used via coke formation. This deactivation by coke formation in zeolites has been simulated by Guo et al. [12] using a site-bond-site modefwith a two dimensional square lattice. The effect of gaseous pressure on the coke formation was foimd to be similar to that reported in the literature. The authors have not compared their results with kinetic data. 

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