Present study demonstrated the preparation of MCM-41 as a support for the immobilization of Candida rugosa lipase by the physical adsorption technique. The lipase immobilized MCM-41 has been characterized by scanning electron microscopic and FTIR techniques. At pH 6, maximum lipase immobilization (250 mg/g) on MCM support has been observed and the immobilized lipase was employed as biocatalyst ...

The catalytic cracking of a fuel oil over fluid catalytic cracking (FCC) catalyst has been investigated applying different additives. Catalyst mixtures consisting of a equilibrium FCC catalyst (E-Cat) blended with ZSM-5, MCM-41 and Mordenite additives were examined at the additive levels of 25 wt.%. The catalytic performance of the matrix was studied in a fixed bed micro-activity test unit (MAT...

The observation of molecular clusters has been of interest for some time. Molecular clusters can show quite different dynamic and static phase behaviour from bulk systems, and, because of their limited size, are accessible to computational molecular dynamics techniques.1-3 Experimentally, molecular clusters are made using several methods, including supersonic jets, vapours, confinement of phase...

The catalytic cracking of a fuel oil over fluid catalytic cracking (FCC) catalyst has been investigated applying different additives. Catalyst mixtures consisting of a equilibrium FCC catalyst (E-Cat) blended with ZSM-5, MCM-41 and Mordenite additives were examined at the additive levels of 25 wt.%. The catalytic performance of the matrix was studied in a fixed bed micro-activity test unit (MAT...

Previous investigations on the dimerization of n-butenes over Ni-containing Al-MCM-41/ZSM-5 mixed-phase catalysts have shown a correlation between conversion and Ni/(Al + Ni) ratio as well metal–support interaction, which is represented by reduction degree. In present work, both approaches are combined to novel model parameter, allows determine proportion active Ni species Al-Ni site pairs thus...

the mesoporous molecular sieve mcm-41 was covalently grafted with 3-chloropropyl trimethoxylsilane and then was reacted with [cr(salpr)(h2o)]cl, (salpr = n,n'-bis(3-salicylidenaminopropyl)amine) to afford mcm-41 containing cr(salpr) moiety, cr(salpr)mcm-41. powder x-ray diffraction and nitrogen adsorption-desorption analyses revealed that not only the textural characteristics of the support wer...

ti-mcm-41 was synthesized at ph 3, 7 and 11. the titanium content was determined by aas and found to be 4%, 3.2% and 4.5%, respectively. in order to increase the titanium content in ti-mcm-41, ti(iv) ions were grafted onto ti-mcm-41 using ticl4 in toluene and ti(obu)4 in ethanol. the incorporation of ti was determined to be 28% and 30%, respectively. the oxidation of olefins such as cyclopenten...

http://dx.doi.org/10.1016/j.jcis.2016.06.052 0021-9797/ 2016 Elsevier Inc. All rights reserved. Recently, Shao et al. published the paper entitled Rebuttal to the criticism on the paper ‘‘Application of Mn/MCM-41 as an adsorbent to remove Methyl Blue from aqueous solution” [1]. Authors mentioned ‘‘In Section 3.9, adsorption kinetics we have cited the incorrect Ref. [2]. We are so sorry for that...

the direct and indirect methods in solvent media and grinding method in a solvent-free media were used to prepare the mcm-41/zno and mcm-48/zno photocatalysts. the x-ray diffraction (xrd) patterns showed that zinc oxide nanoparticles were put into mcm-41 and mcm-48 substrates and there were zno crystallites as secondary phase in the extra framework of mesoporous materials. the decrease of surfa...