Fluid catalytic cracking (FCC) is a major process in oil refineries to produce gasoline and base chemicals from crude oil fractions. The spatial distribution and acidity of zeolite aggregates embedded within the 50-150 μm-sized FCC spheres heavily influence their catalytic performance. Single-molecule fluorescence-based imaging methods, namely nanometer accuracy by stochastic chemical reactions...

Introduction i 1 1. The Principles of Simulated Moving Bed Chromatography 3 1.1 Continuous counter current adsorption systems 3 1.2 The simulated moving bed process 4 1.2.1 The four-section SMB cascade 5 2. Modeling of SMB Column 2.1 Equivalent counter-current model 8 8 3. Characteristics of Adsorbents and Modeling Results 11 3.1 Ca2+ exchanged ion exchange Non-polar dealuminated Faujasite zeol...

the purpose of this study is comparison of manganese absorption capacity by natural and modified zeolite. for this purpose used by from semnan mines zeolite with mean particle diameter of 360 micrometer. for modified zeolite, 5 g amount of natural zeolite with 100 ml of 1 m sodium chloride solution mixed and maintained at 24 hours in room temperature. for measure specific surface of absorbents,...

The absorption of carbon monoxide with H-ZSM-5 and metal-substituted Li-ZSM-5 zeolites has been investigated by Ž . using both cluster and embedded cluster approaches at the HFr6–31G d,p level of theory. For the H-ZSM-5 zeolite, the binding energy of CO on a 3T quantum cluster is predicted to be 2.25 kcalrmol for the C-bound complex. The O-bound complex was found to be less stable by about 0.84...

In a previous work we developed a volume-memory liquid that can expand or shrink significantly as the temperature varies. The working mechanism is based on the thermally induced infiltration and defiltration of an electrolyte solution in the nanopores. In the current study, we investigate the influence of electrolyte concentration on the infiltration behavior, as well as its dependence on tempe...

Zeolite nanoblock (ZNB), prepared by hydrochloric acid decomposition of Na-A type zeolite, works as a highly efficient hydrogen-permeable membrane. Si and Al K-edge X-ray absorption near edge structure (XANES) spectra were measured for ZNB to clarify the local structures. The Si K-edge XANES spectrum is similar to that of the Na-A type zeolite, but the Al K-edge XANES spectrum is interpreted as...

We report the synthesis of a new hierarchical mesoporous TS-1 type zeolite by a simple steam-assisted crystallization method. This novel product exhibits high catalytic activity and a strongly prolonged lifetime in the selective oxidation of 2,3,6-trimethylphenol to trimethyl-p-benzoquinone.

The aim of this study was to determine the effect of natural zeolite (commercial preparation with 80% of clinoptilolite) on counts of different physiological groups of bacteria i.e. sulfide-producing, faecal and total coliform, mesophilic aerobic and anaerobic, and thermophilic bacteria in pig slurry. Zeolite was spread daily directly over partially slatted floor in a dose of 0.4 kg/1 m 2 durin...

—A machine learning approach is applied to classify zeolite crystals according to their framework type. The Zeolite-Structure-Predictor is introduced based on the Random Forest algorithm. Zeolites structural data from the Inorganic Crystal Structure Database (ICSD) are used to train the model. The ZSP uses sixteen attributes including topological descriptors obtained with statistical geometry a...