نتایج جستجو برای: nano structure catalyst

تعداد نتایج: 1649694  

2012
Abdul Rahim Yacob Mohd Khairul Asyraf Amat Mustajab Nur Syazeila Samadi

Nano MgO has been synthesized by hydration and dehydration method by modifies the commercial MgO. The prepared MgO had been investigated as a heterogeneous base catalyst for transesterification process for biodiesel production using palm oil. TGA, FT-IR and XRD results obtained from this study lie each other and proved in the formation of nano MgO from decomposition of Mg(OH)2. This study prove...

2014
Catharina Paukner Krzysztof K. K. Koziol

We report a new strategy towards the control of carbon nanotube (CNT) structure and continuous fibre formation using a floating catalyst direct spinning CVD process. In the procedures used to date, a sulphur promoter precursor is added to significantly enhance the rate of CNT formation in the floating catalyst synthesis. Within the reaction zone, the rapidly grown nanotubes self-assemble into b...

2016
Faris A. J. Al-Doghachi Aminul Islam Zulkarnain Zainal Mohd Izham Saiman Zaidi Embong Yun Hin Taufiq-Yap Gang Yang

A highly active and stable nano structured Pt/Mg1-xNixO catalysts was developed by a simple co-precipitation method. The obtained Pt/Mg1-xNixO catalyst exhibited cubic structure nanocatalyst with a size of 50-80 nm and realized CH4 and CO2 conversions as high as 98% at 900°C with excellent stability in the dry reforming of methane. The characterization of catalyst was performed using various ki...

In this study, the nano-SiO2/hexamethylenetetramine as a new basic heterogeneous nanocatalyst was prepared and used for the synthesis of pyranopyrazole via the four-component reaction. Various aldehydes, hydrazine hydrate, ethyl acetoacetate and malononitrile were reacted at room temperature under solvent-free and grinding conditions. The morphology and structure of nano-cat...

2012
Mohamad Reza Shushizadeh Azar Mostoufi Marjan Fakhrian

BACKGROUND Marine sponge/nano-CuO as a natural catalyst efficiently catalyzed the Sulfonylation reaction of p-chlorobenzene sulfonyl chlorides with amines in order to prepare sulfonamides. The advantages included use of a natural catalyst, ease of handling, requirement of a very small amount of catalyst, mild reaction condition and appropriateness to high yield. OBJECTIVES The current study a...

Journal: Journal of Nanoanalysis 2014
Ali Mohajeri, Laleh Shirazi Yahya Zamani

Nano-sized iron-based catalyst was prepared by the micro-emulsion method. The composition of the final nano-sized iron catalyst, in term of the atomic ratio contains: 100Fe/4Cu/2Ce. Experimental techniques of XRD, BET, TEM and TPR were used to study the phase, structure and morphology of the catalyst. Fischer-Tropsch Synthesis (FTS) reaction test was performed in a fixed bed reactor at pressure...

Journal: :journal of nanostructures 2014
s. c. azimi e. abbaspour-gilandeh

a simple and efficient method for the synthesis of quinolines and polycyclic quinolines using li+ modified nanoporous na+-montmorillonite is described. this new nanocatalyst proceeds via friedlander annulation under solvent-free conditions. it describes our observations about a trend of catalytic activity of lithium cation in nanoporous na+-montmorillonite. in this study, several types of 1,3-d...

2014
S. Komini Babu H. Chung G. Wu P. Zelenay S. Litster

This paper reports the development of a model for simulating polymer electrolyte fuel cells (PEFCs) with non-precious metal catalyst (NPMC) cathodes. NPMCs present an opportunity to dramatically reduce the cost of PEFC electrodes by removing the costly Pt catalyst. To address the significant transport losses in thick NPMC cathodes (ca. >60 μm), we developed a hierarchical electrode model that r...

2008
Zhen-Xing Tang Lu-E Shi

MgO is an important inorganic material, which can be used in many aspects, such as catalyst, toxic-waste remediation agent, adsorbent, and others. In order to make use of MgO, nano-MgO was prepared by ultrasonic method using Mg (CH3COO)2.2H2O as precursor, NaOH aqueous solution as precipitant in this paper. Effect factors on MgO nano-particle size were investigated. Characteristics of samples w...

Journal: :jundishapur journal of natural pharmaceutical products 0
mohamad reza shushizadeh research center of marine pharmaceutical science, ahvaz jundishpur university of medical science, ir iran +98-6114445655, [email protected];[email protected]; research center of marine pharmaceutical science, ahvaz jundishpur university of medical science, ir iran +98-6114445655, [email protected];[email protected] azar mostoufi research center of marine pharmaceutical science, ahvaz jundishpur university of medical science, ir iran +98-6114445655, [email protected];[email protected] marjan fakhrian islamic azad university, science and research branch-khoozestan, ir iran

background marine sponge/nano-cuo as a natural catalyst efficiently catalyzed the sulfonylation reaction of p-chlorobenzene sulfonyl chlorides with amines in order to prepare sulfonamides. the advantages included use of a natural catalyst, ease of handling, requirement of a very small amount of catalyst, mild reaction condition and appropriateness to high yield. objectives the current study aim...

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