Selective Petroleum Refining Over a Zeolite Catalyst with Small Intracrystal Mesopores

Zeolite with trimodal porosity by desilication of zeolite nanocrystals aggregate

“…However, the high cost of carbon materials and the complex synthesis route make the carbon template method unfeasible for large-scale industrial applications. More recently, amphiphilic organosilane or silylated polymers have been successfully used as the secondary template for mesoporous zeolite synthesis [17][18][19][20]. The advantage of silane or silyated polymer as secondary template upon carbon materials is the simple synthesis process, however, the organosilane used as the secondary template is also too expensive for large scale applications.…”

Mesopore formation in zeolite H-SSZ-13 by desilication with NaOH

“…Various strategies for creating combined micro-and mesoporous materials were developed. Some studies focus on the introduction of mesopores during synthesis, for example by soft and hard templating routes [9,11,13,15,[18][19][20][21][22][23][24][25][26][27], while others deal with post synthesis modification by steaming, acid leaching or alkaline treatment [2][3][4]6,7,10,[15][16][17]28,29].…”

Enhancement of Activity and Selectivity in Acid‐Catalyzed Reactions by Dealuminated Hierarchical Zeolites

“…[1] Several approaches have been developed to enhance the mass transport by using zeolite nanosheets and nanocrystals, [2][3][4] or zeolites that contain both micro-and mesopores. The latter hierarchical zeolites were prepared by confined crystal growth, [5,6] by using polymers as mesoporogens, [7] or through post-synthesis desilication or dealumination processes. [8][9][10][11] The advantage of the presence of mesopores is, however, accompanied by the nonshape-selective environment of the acid sites located in the mesopores.…”