نتایج جستجو برای: pb y zeolite

تعداد نتایج: 537509  

2013
Arthur A. Garforth

Structured catalysts formed from the growth of zeolites on substrates is an area of increasing interest due to the increased efficiency of the catalytic process, and the ability to provide superior heat transfer and thermal conductivity for both exothermic and endothermic processes. However, the generation of structured catalysts represents a significant challenge when balancing the relationshi...

Journal: :iranian journal of toxicology 0
gagik badalians gholikandi power and water university of technology (pwut), water research institute (wri), tehran, iran محمد مهدی بانشی mohammad mehdi baneshi department of environmental health engineering, school of public health, yasuj university of medical sciences, tehran, iran عماد دهقانی فرد emad dehghanifard water and wastewater research center, water research institute (wri)/environmental health engineering department, school of public health, tehran university of medical sciences, tehran, iran سعید صالحی saeed salehi department of environmental health engineering, school of public health, arak university of medical sciences, arak, iran احمدرضا یاری ahmad reza yari department of environmental health engineering, school of public health, qom university of medical sciences, qom, iran

background: there are great resources of natural zeolite in iran. zeolite, an inorganic ion-exchanger, may be used as a suitable technical-economical solution for water treatment in many regions of iran. in this study, the characterization of natural zeolite natrolite and the feasibility of removing hardness, cations, and anions were investigated. methods: first, zeolite composition and type we...

Journal: :Frontiers in life sciences and related technologies 2021

Wastewaters of several industries such as textile, leather or dye etc., contain dangerous and toxic compounds, even some which are potential carcinogenics. Considering the volume composition, wastewaters textile industry have much more polluting characteristics compared to other industries. Although treatment processes must definitely be implemented in point environment living organisms, many f...

Journal: :chemistry of solid materials 2013
mojgan zendehdel m solimannejad

a computational study of the electronic structure and stability of complexes formed between zeolite y and boric acid was carried out at the hf and b3lyp levels using 6-31g* basis set. five structures located as local minimum in pes of complex (structures d, e, f, g, and h). the most stable structure is formed due to hydrogen bonding between two hydroxyl of boric acid and both oxygen of ...

2009
Xufeng Lin Cathleen A. Hoel Wolfgang M.H. Sachtler Kenneth R. Poeppelmeier Eric Weitz

Ni-, Cu-, and Fe-loaded acidic and basic Y zeolites were synthesized, and their catalytic properties for oxidative dehydrogenation of ethane (ODHE) to ethylene were characterized. Acidic Ni-loaded Y zeolite exhibits an ethylene productivity of up to 1:08 gC2H4 g 1 cat h 1 with a selectivity of 75%. Acidic Cuand Fe-loaded Y zeolites have an ethylene productivity of up to 0:37 gC2H4 g 1 cat h 1 a...

2005
David F. Plant Guillaume Maurin Robert G. Bell

Methanol is an important feedstock in numerous catalytic processes. It can be produced via Fischer-Tropsch reaction from synthesis gas [1] and its further transformation to hydrocarbons up to C10 is the basis of several industrially important reactions as for instance the Methanol to Gasoline process [2]. Methanol can also be used as an alkylating agent for aromatic compounds in zeolite-catalys...

M Solimannejad Mojgan Zendehdel

A computational study of the electronic structure and stability of complexes formed between Zeolite Y and boric acid was carried out at the HF and B3LYP levels using 6-31G* basis set. Five structures located as local minimum in PES of complex (structures d, e, f, g, and h). The most stable structure is formed due to hydrogen bonding between two hydroxyl of boric acid and both oxygen of ...

2016
Changshun Deng Junji Zhang Lihui Dong Meina Huang Bin Li Guangzhou Jin Junbin Gao Feiyue Zhang Minguang Fan Luoming Zhang Yanjun Gong

The investigation on the modification of NaY zeolite on LaHY and AEHY (AE refers Ca and Sr and the molar ratio of Ca and Sr is 1:1) zeolites was proformed by XRD, N2-physisorption (BET), XRF, XPS, NH3-TPD, Py-IR, hydrothermal stability, and catalytic cracking test. These results indicate that HY zeolite with ultra low content Na can be obtained from NaY zeolite through four exchange four calcin...

2017
Homer C Genuino Shanmugam Thiyagarajan Jan C van der Waal Ed de Jong Jacco van Haveren Daan S van Es Bert M Weckhuysen Pieter C A Bruijnincx

Bio-based furanics can be aromatized efficiently by sequential Diels-Alder (DA) addition and hydrogenation steps followed by tandem catalytic aromatization. With a combination of zeolite H-Y and Pd/C, the hydrogenated DA adduct of 2-methylfuran and maleic anhydride can thus be aromatized in the liquid phase and, to a certain extent, decarboxylated to give high yields of the aromatic products 3-...

The reaction of fly ash with a KOH solution was used to synthesize Linde F(K) zeolite, following which Fourier transform infrared spectroscopy were used to characterize the crystalline material. The competitive adsorption of Cu, Ni, Pb, and Cd onto this zeolite was subsequently studied in quaternary solution systems. The results show that the metal removal rates gradually increase with incr...

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