Diels-Alder cycloaddition between cyclopentadiene and p-benzoquinone has been studied in the confined space of a pure silica zeolite Beta and the impact on reaction rate due to the concentration effect within the pore and diffusion limitations are discussed. Introduction of Lewis or Brønsted acid sites on the walls of the zeolite strongly increases the reaction rate. However, contrary to what o...

Zeolite A and MCM-41 have extensive applications in basic science, petrochemical science, energy conservation/storage, medicine, chemical sensor, air purification, environmentally benign composite structure and waste remediation. However, the use of zeolite A and MCM-41 in these areas, especially environmental remediation, are restricted due to prohibitive production cost. Efficient recycling o...

The direct reductive amination of carbonyl compounds with NH3 and H2 is an alternative route to produce primary amines in practical production. The search for efficient and selective catalysts has attracted great interest. In the present work, the reductive amination of heptaldehyde with NH3 was investigated over a Ru-based catalyst. The product selectivities were found to be related with the s...

Tetraethylenepentamine (TEPA)-based mesoporous MCM-41 is used as the adsorbent to determine the CO2 desorption kinetics of amine-modified materials after adsorption. The experimental data of CO2 desorption as a function of time are derived by zero-length column at different temperatures (35, 50, and 70 ◦C) and analyzed by Avrami’s fractional-order kinetic model. A new method is used to distingu...

The increase in industrialization and development has tremendously diminished fossil fuel resources. Moreover, the excessive use of fuels resulted release various toxic gases an global warming. Hence, necessitating need to search for a renewable energy source. In this study, sesame waste biomass (SWB), which is abundantly available Pakistan, been used as feedstock obtaining bio-oil using pyroly...

Sangyun Lim,† Nan Li,‡ Fang Fang,‡ Mathieu Pinault,§ Codruta Zoican,‡ Chuan Wang,‡ Tarek Fadel,| Lisa D. Pfefferle,‡ and Gary L. Haller*,‡ CheVron Phillips Chemical Company, 1862 Kingwood DriVe, Kingwood, Texas 77339, Department of Chemical Engineering, Yale UniVersity, P.O. Box 208286, New HaVen, Connecticut 06520-8286, CEA Saclay, DSM/ DRECAM/SPAM, Laboratoire Francis Perrin, Bât. 522, P. 249...

vo2+ and its complexes with ethylenediamine (en), acetylacetonate (acac), 2, 2’-bipyridine(bpy) ligands, immobilized within nanoreactors of al-mcm-41 designated as vo2+/al-mcm-41 or vol2/al-mcm-41, were prepared and characterized by x-ray powder diffraction (xrd), ft-ir, bet nitrogen adsorption-desorption and chemical analysis techniques. vo2+/al-mcm-41 and vol2/al-mcm-41 were found to catalyze...