A comparative study of zeolites SSZ-33 and MCM-68 for hydrocarbon trap applications

Selective Production of Light Olefins over MSE-type Zeolite Catalyst

“…Post-synthetic dealumination is very important to fabricate high-performance catalysts for these processes. These materials can function as hydrocarbon traps without dealumination 14) . In addition, Fe-containing MCM-68 prepared by a direct hydrothermal method (Fe-HMCM-68) or by impregnation of MCM-68 with different iron precursors (Fe2O3/ HMCM-68, FeCl3/HMCM-68) act as the catalysts for Friedel-Crafts-type benzylation of toluene 15) .…”

Alkylation of phenol with tert-butyl alcohol over dealuminated HMCM-68 zeolites

“…MCM-68 zeolite is attracting attention because there are only a handful of acidic zeolites that contain three-dimensional channel systems with large pores [2] such as beta zeolite. The synthesis and structural elucidation of this zeolite was studied [2] and various applications, such as alkylation catalysts [3,4], hydrocarbon traps [5], and FCC catalysts [6] have been reported independently.…”

Hydrocarbon adsorption and NOx-SCR on (Cs,Co)mordenite

“…It has long been recognized that the key to reduce hydrocarbon emissions is to rapidly increase the temperature of the modern three-way catalysts when the vehicle is first started [6]. In this sense, the majority of HC emissions (up to 80 %) occur A c c e p t e d M a n u s c r i p t 5 during the cold-start period where any unburned HC is simply released from the tailpipe to the atmosphere [7][8][9].…”

“…A c c e p t e d M a n u s c r i p t 6 Many zeolites (such as FAU, MOR and BEA structures) in various alkali ion-exchanged forms have been described as adsorbents for practical applications and fundamental studies.…”