基于Ni的催化剂的比较研究,这些催化剂是通过各种sol-gel路径制备的
Atheer Al Khudhair1,2, Karim Bouchmella3, Radu Dorin Andrei4
1Department of Chemistry, College of Science, University of Kerbala, Karbala 56001, Iraq.
Molecules (Basel, Switzerland)
|September 14, 2024
概括
绿色化学正在推进新型半孔-催化剂的发展. 非水解性sol-gel路径产生了更多的酸性催化剂,提高了工业应用的乙烯寡合化效率.
科学领域:
- 材料科学 材料科学 材料科学
- 催化剂是一种催化剂.
- 绿色化学 绿色化学
背景情况:
- 不同质的催化剂对于推进绿色化学和降低工业成本至关重要.
- 半孔的二氧化和混合氧化物为催化应用提供可调节的特性.
研究的目的:
- 通过水解溶液凝 (HSG) 和非水解溶液凝 (NHSG) 方法合成和表征具有不同Si/Al比率的半孔性-支物.
- 在乙烯寡合化中评估衍生氧化--催化剂的性能.
主要方法:
- 使用不同氧气供体 (乙醇,二烯乙烯) 的sol-gel合成 (HSG和NHSG).
- 包括EDX,N2物理吸收,XRD,MAS-NMR (29Si,27Al) 和NH3-TPD在内的表征技术.
- 在150°C时发生乙烯寡合反应.
主要成果:
- 与HSG相比,NHSG路线产生了更规律的分布和酸性半孔-支,与HSG相比.
- 通过NHSG以太路线制备的--氧化催化剂在乙烯寡合化中表现出优异的活性.
- 催化剂性能与支酸度和结构规律性相关.
结论:
- 非水解性sol-gel (NHSG) 方法,特别是以太路线,对于制备高度活性的半孔氧化--氧化催化剂是有效的.
- 通过NHSG实现的增强催化剂酸度和结构规律性有助于改善乙烯寡合化.
- 这项研究支持开发高效的异质催化剂,用于绿色化学应用.
更多相关视频
10:57Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction
Published on: April 10, 2018
18.1K
08:40Synthesis of Metal Nanoparticles Supported on Carbon Nanotube with Doped Co and N Atoms and its Catalytic Applications in Hydrogen Production
Published on: December 6, 2021
3.5K
相关概念视频
02:50Catalysis
The presence of a catalyst affects the rate of a chemical reaction. A catalyst is a substance that can increase the reaction rate without being consumed during the process. A basic comprehension of a catalysts’ role during chemical reactions can be understood from the concept of reaction mechanisms and energy diagrams.
01:22Heterogeneous Catalysis
Heterogeneous catalysis involves a catalyst in a different phase from the reactants. It is a process where the catalyst and the reactants are in distinct phases, typically solid and gas or liquid.Most heterogeneous catalysts are metals, metal oxides, or acids. The list includes transition metals like iron (Fe), cobalt (Co), nickel (Ni), palladium (Pd), platinum (Pt), chromium (Cr), manganese (Mn), tungsten (W), silver (Ag), and copper (Cu). These metals possess partially vacant d orbitals that...