Phosphorous-modified ordered mesoporous carbon for catalytic dehydrogenation of propane to propylene

Abstract

Phosphorous (P)-modified ordered mesoporous carbon CMK-3 was used as a catalyst for the direct dehydrogenation (DH) of propane to propylene without any auxiliary stream, and this catalyst exhibited better activity and selectivity than the pristine ordered mesoporous carbon. The prepared samples were characterized by N2 adsorption and desorption, temperature-programmed desorption (TPD), and X-ray photoelectron spectroscopy (XPS). After introduction of P using an impregnation method, P=O groups formed on the surface of the materials and substantially improved the activity and selectivity. The P=O groups are believed to be electron donors for C=O active centers, or independent active centers for catalytic DH of propane.

Bean dregs‐derived hierarchical porous carbons as metal‐free catalysts for efficient dehydrogenation of propane to propylene

“…In recent years, nanocarbons were found to be efficient catalysts in dehydrogenation reactions, and the high surface area, rich porous structures and numerous functional groups are responsible for the high catalytic performance . For instance, carbon nanotubes and nanodiamond were found very active in the oxidative dehydrogenation of alkane .…”

“…For instance, carbon nanotubes and nanodiamond were found very active in the oxidative dehydrogenation of alkane . Also, ordered mesoporous carbons (OMCs) obtained by organic–organic self‐assembly methods were reported to be robust catalysts in the direct dehydrogenation of propane, due to the presence of numerous surface carbonyl groups and mesopores . Very recently, Zhao et al .…”

New hybrid materials based on the grafting of Pd(ii)-amino complexes on the graphitic surface of AC: preparation, structures and catalytic properties

“…As already commented the two catalysts, Merck/Lys-Pd and Merck/Tren-Pd, were prepared by adsorption of PdCl 4 2-on Merck/Lys and Merck/Tren hybrid materials (see experimental section). Their chemical compositions are summarized in Table 1 Merck/Tren-Pd catalyst.…”

“…[1][2][3][4][5][6][7] Nevertheless, ACs are accessible and low-cost materials as they are obtained not only from different natural sources, but also from waste materials (which are so converted into added value products). [2][3][4][5][6][7][8][9][10] Thus, ACs are extensively used as solid supports in heterogeneous catalysis due to their high surface areas, chemical stabilities and high adsorptivities are very important features for this purpose. The suitable control of the catalyst preparation from ACs is a crucial issue to reach large efficiency.…”

Mesoporous Carbon Materials with Functional Compositions

“…Dai and co‐workers prepared phosphorus‐doped OMCs by phosphoric acid activation; and as a solid acid catalyst, the material was active in isopropanol dehydration into propane . Liu's group modified OMCs (CMK‐3) by a impregnation method with (NH 4 ) 2 HPO 4 as a phosphorous source, and the P‐doped CMK‐3 demonstrated good activity in the dehydrogenation of propane to propylene under oxygen‐free conditions . In addition, P‐doping into OMCs can be realized using different mixtures of phosphoric acids and other inorganic acids in the polymerization of a phenol‐aldehyde‐F127 system.…”