نتایج جستجو برای: iranian natural zeolites

تعداد نتایج: 524536  

Journal: :Acta Crystallographica Section A Foundations of Crystallography 2005

Journal: :JURNAL TANAH TROPIKA (JOURNAL OF TROPICAL SOILS) 2017

Journal: :Angewandte Chemie 2006
Feng-Shou Xiao Lifeng Wang Chengyang Yin Kaifeng Lin Yan Di Jixue Li Ruren Xu Dang Sheng Su Robert Schlögl Toshiyuki Yokoi Takashi Tatsumi

Crystals of zeolites with intricate micropores have been widely used in industry as heterogeneous catalysts, in particular as solid acid catalysts in the fields of oil refining and petrochemistry. However, relatively small individual micropores in zeolites such as Beta, ZSM-5, and Y strongly influence mass transport to and from the active sites located within them, severely limiting the perform...

2006
J. R. Michalski S. W. Ruff P. R. Christensen E. Cloutis

Introduction and background: Zeolite minerals are hydrated framework aluminosilicates common to altered volcanic and volcanoclastic rocks, and the soils derived from them [1]. The mineralogy, chemistry, textural context, and abundance of zeolites provides insight into chemical weathering, hydrothermal, and metamorphic processes on Earth, in a variety of climates and tectonic settings. Zeolites ...

Journal: :Physical chemistry chemical physics : PCCP 2013
Hanjun Fang Preeti Kamakoti Peter I Ravikovitch Matthew Aronson Charanjit Paur David S Sholl

The development of accurate force fields is vital for predicting adsorption in porous materials. Previously, we introduced a first principles-based transferable force field for CO2 adsorption in siliceous zeolites (Fang et al., J. Phys. Chem. C, 2012, 116, 10692). In this study, we extend our approach to CO2 adsorption in cationic zeolites which possess more complex structures. Na-exchanged zeo...

2015
Aixia Song Jinghong Ma Ruifeng Li

A systematic and detailed analysis of adsorption and diffusion properties of xylene isomers over Beta zeolites with different mesoporosity was conducted. Adsorption isotherms of xylene isomers over microporous and mesoporous Beta zeolites through gravimetric methods were applied to investigate the impact of mesopores inside Beta zeolites on the adsorption properties of xylene isomers in the pre...

Journal: :Chemical Society reviews 2015
Jiyang Li Avelino Corma Jihong Yu

The search for new zeolites is of continuous interest in the field of zeolite science because of their widespread application in catalysis and adsorption-separation. To this end, considerable efforts have been devoted to the preparation of new zeolites with novel porous architectures and compositions. Taking account of the key factors governing the formation of zeolites (e.g., guest species, fr...

2012
Sabry M. Shaheen Aly S. Derbalah

362 Abstract—In this study, the sorption behaviour of natural (clinoptilolite) zeolites with respect to cadmium (Cd), copper (Cu), nickel (Ni), lead (Pb) and zinc (Zn) has been studied in order to consider its application to purity metal finishing wastewaters. The batch method has been employed, using competitive sorption system with metal concentrations in solution ranging from 50 to 300 mg/l....

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