Coking During DME Synthesis: A Calorimeter Study
Artikel i vetenskaplig tidskrift, 2015

Dimethyl ether (DME) is a promising alternative fuel for transportation and cooking. During the synthesis of DME, formation of coke is the primary cause for deactivation. With micro calorimeter experiments combined with mass spectrometry measurements we show here, that DME adsorbs on two different sites on H-ZSM-5 with heats of adsorption of about 120 and 95 kJ/mol. Exposure to DME at 230 degrees C for 3 h turns the samples brown due to coking and decreases the amount of adsorbed DME, but does not change the heat of adsorption. In contrast, no clear indication of coke formation was observed after the same treatment over gamma-Al2O3.

Zeolite

Heat of adsorption

DME synthesis

Methanol

Författare

Stefanie Tamm

Chalmers, Kemi och kemiteknik, Kemiteknik, Kemisk reaktionsteknik

Kompetenscentrum katalys (KCK)

Topics in Catalysis

1022-5528 (ISSN) 1572-9028 (eISSN)

Vol. 58 14-17 833-842

Ämneskategorier

Kemi

DOI

10.1007/s11244-015-0450-5