Shape-selective disproportionation of ethylbenzene to para-diethylbenzene over ZSM-5 modified by chemical liquid deposition and MgO

Hydrocracking of the crude oil from thermal pyrolysis of municipal wastes over bi-functional Mo–Ni catalyst

“…In the conventional impregnation method for preparing the supported metal oxide catalysts [44][45][46][47], the Al 2 O 3 support impregnated with the aqueous solution of Ni(NO 3 ) 2 was dried at 393 K, and calcinated at 773 K to produce NiO/Al 2 O 3 (NiO was reduced to Ni in hydrogen before hydrocracking tests). Usually, the metal oxides in the form of small particles were obtained on the support.…”

Highly shape‐selective Zn‐P/HZSM‐5 zeolite catalyst for methanol conversion to light aromatics

“…[ 5–11 ] Moreover, the construction of nano‐sized HZSM‐5 [ 12–16 ] and modified HZSM‐5 [ 5,6,10,11,17–20 ] could further improve the catalyst lifetime and BTX selectivity, respectively. The considerable external surface acid sites of nano‐sized HZSM‐5 would induce the secondary reactions of BTX hydrocarbons [ 21–24 ] and coke formation [ 25–31 ] in the MTH process, which not only decreases the BTX selectivity, but also aggravates the deactivation of catalyst. In view of this, we have prepared a nano‐sized HZSM‐5 zeolite modified by ZnSiF 6 ·6H 2 O, which exhibits longer catalyst lifetime and higher BTX selectivity in the MTA reaction.…”

External surface modification of as-made ZSM-5 and their catalytic performance in the methanol to propylene reaction

“…Therefore, attempts have been made to reduce the external surface acidity of ZSM-5, aiming to retard the coke deposition rate and improve the catalytic stability. The strategies developed to passivate the external surface acid sites of zeolites can be mainly classified as macromolecule deposition [10][11][12][13][14][15][16][17][18][19], synthesis of zeolites with core-shell structure [20][21][22][23], metal or non-metal modification [24][25][26][27][28] and so on.…”