نتایج جستجو برای: زیولیت 13x

تعداد نتایج: 402  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه خلیج فارس - دانشکده مهندسی 1391

به منظور طراحی فرآیندهای جداسازی مبتنی بر جذب سطحی نیاز به داده های تعادلی دقیق و مورد اطمینانی در محدوده ی وسیعی از دما، فشار و غلظت می باشد. به علاوه در مطالعات مقدماتی بایستی قابلیت جداسازی مخلوط مورد نظر بر روی جاذب انتخاب شده بررسی شود. بدین منظور، در پژوهش حاضر تعادل جذب سطحی گازهای نیتروژن و متان بر روی جاذب های زئولیت 5a و زئولیت 13x ساخت کمپانی زئوکم به منظور ارزیابی قابلیت جداسازی این...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه صنعتی امیرکبیر(پلی تکنیک تهران) - دانشکده مهندسی شیمی 1387

تبدیل متان با دی اکسید کربن سبب تولید گاز سنتز با نسبت h2/co کمتر از واحد می شود که برای سنتز بسیاری از مواد شیمیایی به کار می رود. به دلیل به کار گیری دو گاز گلخانه ای متان و دی اکسید کربن، واکنش اخیر از دیدگاه زیست محیطی نیز حایز اهمیت فراوان می باشد؛ زیرا تبدیل این گازها به مواد شیمیایی با ارزش، سبب کاهش چشمگیر آلودگی گازهای مذکور در هوا می شوند. در این طرح، کاتالیست نیکل با دو نوع پایه زیول...

Polyurethane/zeolite 13X nanocomposite films were fabricated using solution casting method. The synthesized nanocomposite films were structurally characterized using SEM, TGA and tensile analysis. SEM images showed appropriate distribution of nanocrystalline zeolite particles within polyurethane matrix. Better thermal stability of nanocomposite films in comparison to neat polyurethane was shown...

Background: Magnetic resonance imaging (MRI) using nanostructures has been a proper method for tumor targeting purposes. Different MRI nanomaterials, targeting agents and anticancer drugs have been used for targeting of tumors. Objectives: This study aims to consider the MRI property of doxorubicin (DOX)-loaded gadolinium/13X zeolite/folic acid (Gd3+/13X/FA) nanocomposite.<br /...

2017
Yan Shi Ken Sun Lixin Huo Xiuxiu Li Xuebin Qi Zhaohui Li

Chitosan was used to modify a 13X molecular sieve to improve its cadmium removal capability. After being modified with 2% chitosan-acetate for 2 h at 30 °C, significant uptake of Cd2+ could be achieved. The uptake of Cd2+ on the modified 13X molecular sieve followed the Langmuir isotherms with a capacity of 1 mg/g. The kinetics of Cd2+ removal by modified 13X molecular sieve followed a pseudo s...

In this work, SO2 adsorption on 13X and 5A was explored at different concentrations, and the results were compared to molecular simulation and models. The adsorbent saturation tests were performed at four different concentrations of 250, 500, 750, and 1000 ppm, and it was observed that saturation would take more time for higher SO2 concentrations. Grand Canonical Monte Carlo method was used for...

Polyurethane/zeolite 13X nanocomposite films were fabricated using solution casting method. The synthesized nanocomposite films were structurally characterized using SEM, TGA and tensile analysis. SEM images showed appropriate distribution of nanocrystalline zeolite particles within polyurethane matrix. Better thermal stability of nanocomposite films in comparison to neat polyurethane was shown...

Journal: :Journal of hazardous materials 2008
Hong Zheng Lijie Han Hongwen Ma Yan Zheng Hongmei Zhang Donghong Liu Shuping Liang

With synthetic wastewater, lab-scale batch experiments and column experiments were carried out to investigate the adsorption characteristics of ammonium ion by zeolite 13X which is a hydrothermally synthetic byproduct accompanied with preparation of potassium carbonate from insoluble potash ores. The Langmuir and Freundlich models were applied to describe the equilibrium isotherms for ammonium ...

Journal: :Journal of nuclear and radiochemical sciences 2021

Silver doped zeolite (AgX) has attracted significant attention as a good adsorbent of organic iodine (CH3I) in the gas phase. Heat treatment waste, which is composed iodine-sorbed AgX, may be necessary for disposal, would removed from AgX at high temperature. Therefore, sorption and desorption behaviors CH3I on X (13X) were investigated. Herein, labeled by 125I tracer was synthesized via isotop...

Journal: :Journal of colloid and interface science 2007
Xiu-Wen Wu Hong-Wen Ma Jin-Hong Li Jun Zhang Zhi-Hong Li

An economical mesoporous aluminosilicate was synthesized with microcline as starting material and the precursor 13X zeolite as seed for crystal structure on mesoporous walls. In this method, a mixture of microcline and Na2CO3 with a molar ratio of 1:1.05 was first calcined at 1093 K for 2.5 h. The calcined materials were mixed with 35 ml C16TMABr aqueous solution (containing 8.2 g C16TMABr) and...

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