« Home « Kết quả tìm kiếm

Heterogeneous catalysis

Tìm thấy 10+ kết quả cho từ khóa "Heterogeneous catalysis"

Hydrogen storage in formic acid as a renewable energy source using heterogeneous catalysis

tailieu.vn

Hydrogen storage in formic acid as a renewable energy source using heterogeneous catalysis. Abstract: One of the most vital chemicals, which is not only found naturally but can also be synthesized in the laboratory, is formic acid (FA). Key words: Hydrogen, formic acid decomposition, green chemistry, renewable feedstock, CO 2 , CO.

Ranolazine-functionalized CuO NPs: Efficient homogeneous and heterogeneous catalysts for reduction of 4-nitrophenol

tailieu.vn

Therefore, a greater amount of CuO NPs was used as compared to homogeneous catalysis. The effect of CuO NP dose in the heterogeneous medium is illustrated in Table 2.. Heterogeneous catalysis: the effect of CuO NP dose on reduction of 4-NP: (a) CuO NPs at 0.2 mg, (b) CuO NPs at 0.5 mg.. The effect of CuO NP amounts on 4-NP in heterogeneous media..

Poly(N-vinylimidazole): A biocompatible and biodegradable functional polymer, metal-free, and highly recyclable heterogeneous catalyst for the mechanochemical synthesis of oximes

tailieu.vn

Key words: Heterogeneous catalysis, functional polymer, condensation reaction, ball milling technique, solvent-free conditions Received Accepted/Published Online Final Version . doi:10.3906/kim-2107-44 Research Article. The purity determination of the products was accomplished by TLC on silica gel polygram SIL G/UV 254 plates. General procedure for the synthesis of oximes.

Nghiên cứu tổng hợp Biodiesel từ dầu hạt cao su trên xúc tác dị thể NaOH/MgO và Na2CO3/Al2O3

234450-TT-EN.pdf

dlib.hust.edu.vn

The second phase which heterogeneous catalysis has been established with the performance is 85% of the NaOH/MgO catalyst in the conditions: Reaction temperature: 60oC. Reaction Time: 5 hours, Ratio Methanol/Oil is 6/1. volume of catalyst is 4g/100ml rubber seed oil and 80% of Na2CO3/γ-Al2O3 with conditions of: reaction temperature: 60oC. reaction time: 5 hours.

Poly(4-vinylpyridine)-supported dual acidic ionic liquid: an environmentally friendly heterogeneous catalyst for the one-pot synthesis of 4,4’-(arylmethylene)bis(3-methyl-1-phenyl-1H-pyrazol-5-ols)

tailieu.vn

Key words: 3-Methyl-l-phenyl-5-pyrazolone, aldehydes, ionic liquid, one-pot synthesis, heterogeneous catalysis. These ionic liquids are of special importance because they possess simultaneously proton acidity and the characteristic properties of an ionic liquid.

Synthesis of uniform cube shape CuFe2O4 nanoparticles by a hydrothermal method

tailieu.vn

The CuFe 2 O 4 NPs is extremely useful for support catalyst in heterogeneous catalysis applications and adsorption.. Keywords: Cube shape CuFe 2 O 4 , superparamagnetic, nanoparticles.

Preparation of a novel solid acid catalyst with Lewis and Brønsted acid sites and its application in acetalization

tailieu.vn

In order to facilitate the purification of products and decrease cost, environmentally friendly heteroge- neous catalysis was a natural choice as the replacement for homogeneous catalysis. 10,11 Immobilization of the functionalized ionic liquids on solid supporting materials can combine the ionic liquid characteristics with the ad- vantages of heterogeneous catalysis.

Impact of graphitic carbon nitrides synthesized from different precursors on Schottky junction characteristics

tailieu.vn

It should be noted that the mechanism of photocatalytic formic acid dehydrogenation which emphasized the importance of photogenerated holes in the valence band of the semiconductor, is different from heterogeneous catalysis. Schematic representation of the graphitic carbon nitride formation.. Thus, the charge separation ability of the photocatalyst would be essential for the reaction rate.

A microwave-assisted highly stereoselective one-pot Wittig reaction under solvent-free conditions

tailieu.vn

The reaction was carried out under solvent-free conditions using basic alumina both as a heterogeneous catalyst and a solid support. In addition, owing to the solid-state nature of the reactions, our procedure prevented the need for tedious aqueous extraction at the end of the reaction, thereby adding another aspect to the greenness of the reaction.. Key words: Wittig reaction, stereoselectivity, microwave-assisted, one-pot synthesis, heterogeneous catalysis.

Green dehydrogenation of dimethylamine borane catalyzed by cheaply copper(0) nanocatalysts without any stabilizer at nearly room temperature

tailieu.vn

From these results, it can be concluded that the dehydrogenation of DMAB is a heterogeneous catalysis and Cu(0) NCats are the kinetically competent catalyst.. Reusability and isolability of Cu(0) NCats in the green dehydrogenation of DMAB. Therefore, the reusability and isolability of Cu(0) NCats were tested for the green dehydrogenation of DMAB at nRT.

Chapter 2: Ligands used for aqueous organometallic catalysis

tailieu.vn

As in organometallic catalysis in general, phosphines play a leading role in aqueous organometallic catalysis (AOC), too. There is a vast armoury of synthetic organic chemistry available for preparation and modification of various phosphine derivatives of which almost exclusively the tertiary phosphines are used for catalysis.

Heterogeneous Connectivity Administrator’s Guide

tailieu.vn

Heterogeneous Services assumes that character date values fetched from the non-Oracle system are in this format. Also, Heterogeneous Services sends character date bind values in this format to the non-Oracle system.. Informs Heterogeneous Services of the value of the national character set of the non-Oracle data source. Specifies the size of the Heterogeneous Services cache containing the non-Oracle system equivalent of ROWIDs.

Chapter 10: Host-guest chemistry in aqueous organometallic catalysis

tailieu.vn

It would be unfair to leave unmentioned other host molecules, capable of promoting catalytic reactions in aqueous media. 10.2 Application of cyclodextrins and other host molecules in aqueous organometallic catalysis.

Heterogeneous educational data classiffication at the course level

tailieu.vn

In this paper, we propose a novel solution to the course-level student prediction task for all the students in a current course using the heterogeneous data from the pre- vious one. In addition, a heterogeneous combination of textual and numeric data is considered in the supervised learning process to obtain a prediction model.

Build knowledge graph from heterogeneous documents

tailieu.vn

BUILD KNOWLEDGE GRAPH FROM HETEROGENEOUS DOCUMENTS. This paper introduces a novel methodology to build knowledge graph from heterogeneous documents. We use the methodologies of Natural Language Processing and deep learning to build this graph. The knowledge graph can use in Question answering systems and Information retrieval especially in Computing domain.. A knowledge graph (KG) is a natural candidate for representing this.

Combining Data in Tables from Heterogeneous Data Sources

tailieu.vn

Microsoft SQL Server 2000 and later supports two methods to access data from heterogeneous data sources through OLE DB: linked servers and ad hoc connector names.. You can refer to linked servers in SQL statements using a four-part name comprised of the names of the linked server, the catalog, the schema within the catalog, and data object.

Heterogeneous linear multi-agent consensus with nonconvex input constraints and switching graphs

tailieu.vn

Heterogeneous linear multi-agent consensus with nonconvex input constraints and switching graphs. Heterogeneous multi-agent systems Control input constraints Switching graphs Distributed algorithm. This study focuses on a constrained consensus problem of heterogeneous linear multi- agent systems with nonconvex input constraints and switching graphs.

PGRA: Projected graph relation-feature attention network for heterogeneous information network embedding

tailieu.vn

Chawla, Heterogeneous graph neural network, in: Proceedings of the 25th ACM SIGKDD International Conference on Knowledge Discovery &

Heterogeneous rates of genome rearrangement contributed to the disparity of species richness in Ascomycota

tailieu.vn

Heterogeneous rates of genome. However, it is not known whether heterogeneous rates of chromosomal rearrangement at the genome scale contributed to the huge disparity of species richness among different groups of organisms, which is one of the most remarkable and pervasive patterns on Earth. Results: We quantified rates of genome rearrangement for 71 Ascomycota species that have well-assembled genomes.

Nghiên cứu tổng hợp vật liệu quang xúc tác nano hệ TiO2 -CeO2 và thăm dò khả năng ứng dụng trong xử lý môi trường

01050001121.pdf

repository.vnu.edu.vn

Photocatalyst (Degussa, P-25) Consisting of Anatase and Rutile Crystalline Phases”, Journal of Catalysis 203, pp. (2005), “Preparation and characterization of mesoporous TiO 2 -CeO 2 nanopowder respond to visible wavelength”, Journal of Solid State Chemistry 178, pp. (1992), “Infrared spectroscopic investigation of gassolid heterogeneous photocatalytic oxidation of trichloroethylene”, Journal of Molecular Catalysis 77, pp. (2001), “Characterization of La 2 O 3 -TiO 2 and V 2 O 5 /La 2 O 3 - TiO 2