热催化系统中气体吸附和表面覆盖的多尺度建模
1Department of Chemical and Environmental Engineering, University of California Riverside CA 92521 USA jianzhon@ucr.edu.
Chemical science
|September 19, 2025
概括
一个新的多尺度模型将Kohn-Sham密度函数理论 (KS-DFT) 与经典的DFT集成在一起,以准确预测热催化反应. 这种方法考虑了气体分子的分布,改进了工业条件的模型.
科学领域:
- 计算化学计算化学
- 材料科学 材料科学 材料科学
- 化学工程是化学工程的重要组成部分.
背景情况:
- 热催化系统的传统科恩-沙姆密度函数理论 (KS-DFT) 模型忽略了同质气体分子分布.
- 工业反应发生在高温和高压下,显著增加了催化剂表面附近的局部气体密度.
研究的目的:
- 开发一个多尺度的计算框架,考虑气体分子与催化剂表面的结合和非结合相互作用.
- 评估环境因素对热催化系统表面组成和反应动力学的影响.
主要方法:
- 将KS-DFT用于表面结合能量的集成与用于气体分布和大潜力计算的经典DFT.
- 在工业相关条件下开发一种多尺度的模型吸附和覆盖的方法.
主要成果:
- 研究表明,表面成分取决于化学吸收,地点可访问性和气相相互作用.
- 使用二氧化碳热催化化作为基准,确定了表面覆盖面,气相组成和热力学条件之间的关系.
结论:
- 开发的多尺度框架在现实的工业条件下提供了更准确的热催化系统表示.
- 这种方法为研究工业催化相关的表面吸附和覆盖现象开辟了新的可能性.
更多相关视频
06:45Author Spotlight: Characterizing Porous Materials for Aiding the Development of Robust Metal-Organic Frameworks with Adsorption Behavior
Published on: March 8, 2024
9.8K
11:38In situ FTIR Spectroscopy as a Tool for Investigation of Gas/Solid Interaction: Water-Enhanced CO2 Adsorption in UiO-66 Metal-Organic Framework
Published on: February 1, 2020
16.8K
相关概念视频
02:50Catalysis
30.1K
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.
30.1K
01:16Thermal Sigmatropic Reactions: Overview
2.5K
Sigmatropic rearrangements are a class of pericyclic reactions in which a σ bond migrates from one part of a π system to another. These are intramolecular rearrangements where the total number of σ and π bonds remain unchanged.
Sigmatropic shifts are classified based on an order term [i, j ], where i and j indicate the number of atoms across which each end of the σ bond migrates. Below are examples of a [3,3] sigmatropic shift in 1,5-hexadiene, referred...
Sigmatropic shifts are classified based on an order term [i, j ], where i and j indicate the number of atoms across which each end of the σ bond migrates. Below are examples of a [3,3] sigmatropic shift in 1,5-hexadiene, referred...
2.5K