催化剂的开发 共同热解工艺用于从油污染的聚烯塑料中生产热解油和
Tapanee Sangpatch1, Vorapot Kanokkantapong2,3, Preechapat Puasuwon4,5
1International Program in Hazardous Substance and Environmental Management, Chulalongkorn University, Bangkok, Thailand.
Scientific reports
|July 29, 2025
概括
将油性食品包装废弃物,如被油污染的聚烯塑料,回收成有价值的热解油和是可行的. 这些产品的共同生产为废物转化能源方法提供了有利可图的替代方案.
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
- 环境科学 环境科学
背景情况:
- 食品包装废弃物,特别是受油污染的材料,带来了回收的挑战.
- 目前的废物转化能源方法是常见的,但更高价值的产品回收是可能的.
- 聚烯 (PP) 塑料与油是代表性的废物流.
研究的目的:
- 为了研究石油污染的PP塑料的快速热解,以生产热解油和.
- 评估催化剂和操作条件对产品产量和质量的影响.
- 评估联合生产热解油和的经济可行性.
主要方法:
- 聚烯塑料与棕油的快速热解 (模拟食用油污染).
- 考林催化剂负荷,热解温度和加热速率的研究.
- 使用来自大米的活性炭作为联合催化剂.
- 热解油和属性的分析 (粘度,酸度,FTIR,GC-MS).
- 催化剂的可重复使用性和技术经济评估.
主要成果:
- 棕油增加了产量,但也增加了热解油粘度和酸值.
- 较高的高负荷,温度和加热率降低了产量,但没有改善油质.
- 活性炭共催化剂降低了油的酸度,并增强了的形成.
- 热解表现出极好的性能 (VI>400,倒点26°C),由脂肪酸和酒精组成.
- 催化剂在三个周期内显示出良好的可重复使用性.
结论:
- 快速热解对于将油性食品包装废物转化为有价值的热解油和是有效的.
- 优化催化剂,如活性炭,可以提高产品质量和产量.
- 从受污染的PP塑料中联合生产热解油和在经济上是有利的,可以实现净利.
相关概念视频
02:35Free-Radical Chain Reaction and Polymerization of Alkenes
8.2K
The conversion of alkenes to macromolecules called polymers is a reaction of high commercial importance. The structure of the polymer is defined by a repeating unit, while the terminal groups are considered insignificant. The average degree of polymerization represents the number of repeating units in the polymer molecule and is denoted by the subscript n.
8.2K
01:13Olefin Metathesis Polymerization: Overview
2.2K
Recently, the development of olefin metathesis polymerization advanced the field of polymer synthesis. Simply put, the reorganization of substituents on their double bonds between two olefins in the presence of a catalyst is known as the olefin metathesis reaction. The use of metathesis reaction for polymer synthesis is called olefin metathesis polymerization.
Ruthenium-based Grubbs catalyst is the most commonly used catalyst for olefin metathesis polymerization. Grubbs catalyst consists...
Ruthenium-based Grubbs catalyst is the most commonly used catalyst for olefin metathesis polymerization. Grubbs catalyst consists...
2.2K
02:24Reduction of Alkynes to cis-Alkenes: Catalytic Hydrogenation
8.1K
Introduction
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.
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.
8.1K
01:16Olefin Metathesis Polymerization: Ring-Opening Metathesis Polymerization (ROMP)
2.7K
Ring-opening metathesis polymerization or ROMP involves strained cycloalkenes as starting materials. The mechanism of ROMP proceeds by reacting cycloalkene with Grubbs catalyst to give metallacyclobutane intermediate which undergoes a ring-opening reaction to form new carbene. The new carbene reacts with another molecule of cycloalkene. Repetition of these steps leads to the formation of an unsaturated open-chain polymer product. All these steps are reversible, however, relieving the ring...
2.7K
01:14Aldehydes and Ketones to Alkenes: Wittig Reaction Mechanism
3.8K
The Wittig reaction, which converts aldehydes or ketones to alkenes using phosphorus ylides, proceeds through a nucleophilic addition‒elimination process.
The reaction begins with the nucleophilic addition between a phosphorus ylide and the carbonyl compound. Due to its carbanionic character, phosphorus ylide acts as a strong nucleophile and attacks the electrophilic carbonyl group. This generates a charge-separated dipolar intermediate called betaine. The negatively charged oxygen atom and...
The reaction begins with the nucleophilic addition between a phosphorus ylide and the carbonyl compound. Due to its carbanionic character, phosphorus ylide acts as a strong nucleophile and attacks the electrophilic carbonyl group. This generates a charge-separated dipolar intermediate called betaine. The negatively charged oxygen atom and...
3.8K