In situ solid-state NMR studies of the catalytic conversion of methanol on the molecular sieve SAPO-34

Journal Article · Thu Apr 05 00:00:00 EDT 1990 · Journal of Physical Chemistry; (USA)

DOI:https://doi.org/10.1021/j100370a002· OSTI ID:6580283

Anderson, M W; Sulikowski, B; Barrie, P J; Klinowski, J ^[1]

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1. Univ. of Cambridge (England)

We have monitored the shape-selective catalytic conversion of methanol (MeOH) to low-molecular-weight olefins and aliphatics over the molecular sieve SAPO-34 using {sup 13}C and {sup 1}H magic-angle-spinning (MAS) NMR in tandem with gas chromatography. The size of the eight-membered windows in the structure limits the gas-phase products to linear C{sub 1}, C{sub 2}, and C{sub 3} species. However, the main species present in the intracrystalline space are branched C{sub 4} and C{sub 5} saturated hydrocarbons such as isobutane and isopentane: too large to leave the intracrystalline pore system they become trapped, thus imposing an additional steric constraint on the diffusion of linear hydrocarbons.

• OSTI ID: 6580283
• Journal Information: Journal of Physical Chemistry; (USA), Vol. 94:7; ISSN 0022-3654
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
METHANOL
CONVERSION
SYNTHESIS GAS
DATA ANALYSIS
EXPERIMENTAL DATA
MEASURING INSTRUMENTS
MEASURING METHODS
MOLECULAR SIEVES
NMR SPECTRA
ADSORBENTS
ALCOHOLS
DATA
FLUIDS
GASES
HYDROXY COMPOUNDS
INFORMATION
NUMERICAL DATA
ORGANIC COMPOUNDS
SPECTRA
010408* - Coal
Lignite
& Peat- C1 Processes- (1987-)