一氧化乙酸合成使用激活SBA-15型催化剂
Yesim Gucbilmez1, Ibrahim Calis2
1Department of Chemical Engineering, ESTU, Eskisehir, 26555, Turkey.
Heliyon
|February 20, 2025
概括
这项研究引入了基于的新型催化剂,用于高效合成绿色溶剂和燃料添加剂乙烯酸乙烯. 该过程在温和的条件下运行,提高了可持续性,降低了能源需求.
科学领域:
- 化学工程是化学工程的重要组成部分.
- 材料科学 材料科学 材料科学
- 催化剂是一种催化剂.
背景情况:
- 乙酸乙烯是一种有价值的化合物,作为绿色溶剂和燃料添加剂.
- 有效和可持续的合成方法对于其工业生产至关重要.
- 现有的方法可能需要恶劣的条件或不太环保的催化剂.
研究的目的:
- 开发和描述用于乙酸乙烯合成的新型合物SBA-15催化剂.
- 研究这些催化剂在温和反应条件下的有效性.
- 为了优化合成过程,以获得最大的乙酸乙烯产量和能源效率.
主要方法:
- 使用浸 (IMP) 方法合成-SBA-15催化剂.
- 使用XRD,N2物理吸收,SEM,CO化学吸收和TPR的催化剂的表征.
- 在温和的蒸发条件下 (35°C) 从乙醇 (EtOH) 合成乙烯酸乙烯的单氧化合成.
- 优化反应参数,包括温度,O2/EtOH分子比率和空间速度.
主要成果:
- 催化剂保持了SBA-15结构,具有高BET表面积 (626-665 m2/g) 和孔积 (0.93-0.95 cm3/g).
- 最佳的Pd/Si摩尔比被确定为0.03.
- 在200°C,1 atm时,以0.5的O2/EtOH比率和2206h-1.1的空间速度达到0.25的最大乙烯酸产量.
- 轻度反应条件显著降低了能源需求.
结论:
- 嵌入的SBA-15催化剂对乙酸乙烯生产是有效的.
- 开发的方法为乙酸乙烯合成提供了一种可持续和节能的途径.
- 使用来自诸如甜菜纸等来源的生物乙醇可以进一步提高该过程的可持续性.
相关概念视频
Oxidation of Alkenes: Syn Dihydroxylation with Osmium Tetraoxide
9.8K
Alkenes are converted to 1,2-diols or glycols through a process called dihydroxylation. It involves the addition of two hydroxyl groups across the double bond with two different stereochemical approaches, namely anti and syn. Dihydroxylation using osmium tetroxide progresses with syn stereochemistry.
9.8K
Reduction of Alkenes: Asymmetric Catalytic Hydrogenation
3.2K
Catalytic hydrogenation of alkenes is a transition-metal catalyzed reduction of the double bond using molecular hydrogen to give alkanes. The mode of hydrogen addition follows syn stereochemistry.
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...
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...
3.2K
Reactions of Aldehydes and Ketones: Baeyer–Villiger Oxidation
3.9K
Baeyer–Villiger oxidation converts aldehydes to carboxylic acids and ketones to esters. The reaction uses peroxy acids or peracids and is often catalyzed by acid. The reaction is named after its pioneers, Adolf von Baeyer and Victor Villiger. The reaction is achieved by a wide range of peracids such as m-chloroperoxybenzoic acid (mCPBA), perbenzoic acid (C6H5COOOH), peracetic acid (CH3COOOH), hydrogen peroxide (H2O2), and tert-butyl hydroperoxide (t-BuOOH).
The carbonyl center is...
The carbonyl center is...
3.9K
Sharpless Epoxidation
3.8K
The conversion of allylic alcohols into epoxides using the chiral catalyst was discovered by K. Barry Sharpless and is known as Sharpless epoxidation. The use of a chiral catalyst enables the formation of one enantiomer of the product in excess. This chiral catalyst is mainly a chiral complex of titanium tetraisopropoxide and tartrate ester (specific stereoisomer). The stereoisomer used in the chiral catalyst dictates the formation of the enantiomer of the product. In other words, the use of...
3.8K
Oxidation of Alkenes: Syn Dihydroxylation with Potassium Permanganate
10.7K
Alkenes can be dihydroxylated using potassium permanganate. The method encompasses the reaction of an alkene with a cold, dilute solution of potassium permanganate under basic conditions to form a cis-diol along with a brown precipitate of manganese dioxide.
10.7K
Oxidation of Alkenes: Anti Dihydroxylation with Peroxy Acids
5.6K
Diols are compounds with two hydroxyl groups. In addition to syn dihydroxylation, diols can also be synthesized through the process of anti dihydroxylation. The process involves treating an alkene with a peroxycarboxylic acid to form an epoxide. Epoxides are highly strained three-membered rings with oxygen and two carbons occupying the corners of an equilateral triangle. This step is followed by ring-opening of the epoxide in the presence of an aqueous acid to give a trans diol.
5.6K


