Evidence of autocatalysis in methanol to hydrocarbon reactions over zeolite catalysts

Journal Article · Wed Aug 01 04:00:00 EDT 1979 · J. Catal.; (United States)

DOI:https://doi.org/10.1016/S0021-9517(79)80050-0· OSTI ID:6286091

Chen, N Y; Reagan, W J

The kinetics of the conversion of methanol to gasoline on shape-selective ZSM-5 catalysts were studied in an isothermal flow reactor. At low conversions of methanol, the reaction was very slow and it accelerated rapidly at residence times that permitted the presence of increased hydrocarbon concentrations. Also, at conversions of < 1%, the propylene yield was approx. 60, but above 20% conversion, the products included approx. 14% ethylene, 14% propylene, and approx. 70% C/sub 4/ + hydrocarbons. These data were consistent with a two-step conversion; a slow conversion of oxygenates (methanol, dimethyl ether) to ethylene, and a 50 times more rapid autocatalytic reaction of oxygenate with product olefins. Tests with three zeolites of different intrinsic acid activity, obtained by steam-treatments, suggested that quantitatively similar catalytic sites (probably Broensted acid sites) were responsible for the two reactions.

• Research Organization: Mobil Research Development Corp.
• OSTI ID: 6286091
• Journal Information: J. Catal.; (United States), Journal Name: J. Catal.; (United States) Vol. 59:1; ISSN JCTLA
• Country of Publication: United States
• Language: English

Related Subjects

090121* -- Hydrocarbon Fuels-- Chemical Synthesis-- (1976-1989)
10 SYNTHETIC FUELS
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400301 -- Organic Chemistry-- Chemical &amp; Physicochemical Properties-- (-1987)
ALCOHOLS
ALKENES
CATALYSIS
CATALYTIC EFFECTS
CHEMICAL REACTION KINETICS
CHEMICAL REACTION YIELD
CHEMICAL REACTIONS
DATA
ETHYLENE
EXPERIMENTAL DATA
FUELS
GASOLINE
HYDROCARBONS
HYDROXY COMPOUNDS
INFORMATION
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
ISOTHERMAL PROCESSES
KINETICS
LIQUID FUELS
MATERIALS
METHANOL
MINERALS
NUMERICAL DATA
ORGANIC COMPOUNDS
PETROLEUM PRODUCTS
PROPYLENE
REACTION INTERMEDIATES
REACTION KINETICS
SYNTHESIS
TIME DEPENDENCE
YIELDS
ZEOLITES