有效的CO2化以形成在温和条件下的连续流系统,由基于Ir的多孔有机聚合物催化
Xinrong Wang1, Wentao Ma1, Peng Zheng1
1School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, P. R. China.
本研究介绍了KAPs-Ir,这是一种高效的基于的多孔有机聚合物催化剂,用于连续流动的二氧化碳化. 它在温和条件下实现高格式生产,具有出色的稳定性.
科学领域:
- 催化剂是一种催化剂.
- 材料科学 材料科学 材料科学
- 绿色化学 绿色化学
背景情况:
- 开发高效的二氧化碳 (CO2) 化催化系统对于可持续的化学生产至关重要.
- 与批量工艺相比,连续流系统提供了更高的安全性和效率.
- 温和反应条件是理想的,以减少能源消耗和运营成本.
研究的目的:
- 开发和研究基于的新型多孔有机聚合物 (KAPs-Ir) 用于连续流的二氧化碳化.
- 在温和条件下实现高催化性能.
- 评估KAPs-Ir催化剂的稳定性和可重复使用性.
主要方法:
- 一系列基于的多孔有机聚合物 (KAPs-Ir) 的合成.
- 在连续流量CO2化系统中测试KAPs-Ir催化剂.
- 优化反应条件,包括温度和压力.
- 催化剂的长期稳定性测试.
主要成果:
- 一个KAPs-Ir催化剂 (KAPs-1c Ir:0.37 wt%) 实现了10403 mmol_FA g_Ir^-1 h^-1的高生产率,用于二氧化碳化形成.
- 在温和条件下 (80°C和0.4 MPa) 获得了这种生产力.
- 催化剂表现出极好的稳定性,保持至少240小时的反应性.
结论:
- KAPs-Ir催化剂对于连续流动的二氧化碳化非常有效.
- 开发的系统在生产率和反应条件方面明显优于现有方法.
- 催化剂的稳定性确保了其在二氧化碳转化中的实际应用潜力.
更多相关视频
12:08Catalytic Reactions at Amine-Stabilized and Ligand-Free Platinum Nanoparticles Supported on Titania During Hydrogenation of Alkenes and Aldehydes
Published on: June 24, 2022
06:32A Simple, Low-cost, and Robust System to Measure the Volume of Hydrogen Evolved by Chemical Reactions with Aqueous Solutions
Published on: August 17, 2016
相关概念视频
Reduction of Alkenes: Catalytic Hydrogenation
Metals like palladium, platinum, and nickel are commonly used in their solid forms — fine powder on an inert surface. As these catalysts remain insoluble in the reaction mixture, they are referred to as heterogeneous catalysts.
The hydrogenation process takes place on the...
Reduction of Alkenes: Asymmetric Catalytic Hydrogenation
The metal catalyst used can be either heterogeneous or homogeneous. When hydrogenation of an alkene generates a chiral center, a pair of enantiomeric products is expected to form. However, an enantiomeric excess of one of the products can be facilitated using an enantioselective reaction or an...
Catalysis
Esters to Carboxylic Acids: Acid-Catalyzed Hydrolysis
During hydrolysis, the ester is first activated towards nucleophilic attack through the protonation of the carboxyl oxygen atom by the acid catalyst. The protonation makes the ester carbonyl carbon more electrophilic. In the next step, water acts as a nucleophile and adds to the...
Reduction of Alkynes to cis-Alkenes: Catalytic Hydrogenation
Like alkenes, alkynes can be reduced to alkanes in the presence of transition metal catalysts such as Pt, Pd, or Ni. The reaction involves two sequential syn additions of hydrogen via a cis-alkene intermediate.
Alkynes to Aldehydes and Ketones: Hydroboration-Oxidation
One of the convenient methods for the preparation of aldehydes and ketones is via hydration of alkynes. Hydroboration-oxidation of alkynes is an indirect hydration reaction in which an alkyne is treated with borane followed by oxidation with alkaline peroxide to form an enol that rapidly converts into an aldehyde or a ketone. Terminal alkynes form aldehydes, whereas internal alkynes give ketones as the final product.
