𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Time-resolved 13C MAS NMR investigation of chemical reactions: the MTG process

✍ Scribed by Toralf Mildner; Horst Ernst; Dieter Freude; Jörg Kärger; Ulf Winkler

Publisher
John Wiley and Sons
Year
1999
Tongue
English
Weight
84 KB
Volume
37
Category
Article
ISSN
0749-1581

No coin nor oath required. For personal study only.

✦ Synopsis

Sample heating with a laser beam facilitates time-dependent magic angle spinning (MAS) NMR spectroscopy of high-temperature reactions in situ. The methanol-to-gasoline conversion (MTG process) was monitored by 13 C MAS NMR spectroscopy using the stop-and-go method in addition to the continuous heating of sealed samples. It was found that effective alkane formation is forced by interrupted laser heating. With a decrease of the dimethyl ether concentration a constant concentration of methanol was observed under both continuous and interrupted heating conditions.

📜 SIMILAR VOLUMES

13C NMR investigation of the reaction in
13C NMR investigation of the reaction in water of UF resins with blocked emulsifiable isocyanates
✍ A. Despres; A. Pizzi; L. Delmotte 📂 Article 📅 2005 🏛 John Wiley and Sons 🌐 English ⚖ 114 KB

## Abstract A solid state ^13^C NMR study of hardened networks obtained by the reaction of blocked and nonblocked isocyanates (pMDI) with urea‐formaldehyde (UF) resins in water showed different results according to the temperature of the reaction. At high temperature, in water, both a nonblocked or

A 13C Solid-State NMR Investigation of t
A 13C Solid-State NMR Investigation of the Alkynyl Carbon Chemical Shift Tensors for 2-Butyne-1,4-diol
✍ Guy M Bernard; Roderick E Wasylishen 📂 Article 📅 2002 🏛 Elsevier Science 🌐 English ⚖ 207 KB

The alkynyl carbon chemical shift (CS) tensors for 2-butyne-1,4-diol are reported, based on analyses of the carbon-13 NMR spectra of stationary-powder and slow magic-angle spinning (MAS) samples for which the alkynyl carbon nuclei are enriched in 13C. NMR spectra of slow MAS samples exhibit spinning