在一个床连续反应堆中,强电的催化氧化
Antonio Hernandez Mañas1,2, Léa Vilcocq2, Pascal Fongarland2
1Ircelyon, UMR 5256, CNRS, Universite Claude Bernard Lyon 12, Avenue Albert Einstein, F-69626, Villeurbanne Cedex, Lyon, France.
ChemPlusChem
|December 10, 2024
概括
这项研究证明了使用连续反应器的Kraft素的催化氧化,产生了像素这样的有价值的化合物. 与批量工艺相比,优化条件显著提高了香草素的生产.
科学领域:
- 化学工程是化学工程的重要组成部分.
- 催化剂是一种催化剂.
- 生物质转换生物质转换
背景情况:
- 实力金是纸和造纸工业的主要副产品,对处置提出了挑战.
- 强力素的价值化转化为利等高价值化学品是生物炼油厂的一个重要目标.
- 以前的素脱聚合方法往往缺乏效率或可扩展性.
研究的目的:
- 在实验室规模的连续床反应堆中研究 Kraft 素的催化氧化.
- 为了确定最佳的操作条件,最大限度地提高香草素的生产.
- 为了比较连续流反应堆的效率与传统批量反应堆的素脱聚合.
主要方法:
- 使用固体异质催化剂进行Kraft氨酸脱聚合.
- 采用了实验室规模的连续床反应堆设置.
- 系统地改变了操作参数,包括温度,停留时间,接触时间,催化剂负荷和素度.
主要成果:
- 成功地去聚合了Kraft质素,产生了化合物,特别是素.
- 确定了素形成的最佳条件:中温 (200°C),短接触时间 (<1gcat.min.gfeed-1),高催化剂负荷 (32g),低素度 (5g.L-1).
- 与批量反应堆相比,使用连续固定床反应堆实现了素生产率的30倍增加.
结论:
- 连续滴流床反应堆中的催化氧化是一种有效的Kraft素价值化方法.
- 优化的操作条件显著提高了香草的产量和生产率.
- 连续流程的工艺提供了优越的效率,比批量方法的宁脱聚合和素生产.
相关概念视频
02:21Oxidation of Alkenes: Syn Dihydroxylation with Potassium Permanganate
10.9K
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.
10.9K
02:37Oxidation of Alcohols
12.8K
In this lesson, the oxidation of alcohols is discussed in depth. The various reagents used for oxidation of primary and secondary alcohols are detailed, and their mechanism of action is provided.
The process of oxidation in a chemical reaction is observed in any of the three forms:
The process of oxidation in a chemical reaction is observed in any of the three forms:
12.8K
01:22Reactions of Aldehydes and Ketones: Baeyer–Villiger Oxidation
4.0K
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...
4.0K
01:46Oxidative Cleavage of Alkenes: Ozonolysis
9.9K
In ozonolysis, ozone is used to cleave a carbon–carbon double bond to form aldehydes and ketones, or carboxylic acids, depending on the work-up.
Ozone is a symmetrical bent molecule stabilized by a resonance structure.
Ozone is a symmetrical bent molecule stabilized by a resonance structure.
9.9K