Kinetics study of catalytic pyrolysis of polystyrene polymer using response surface method

IF 2.4 3区 化学 Q3 POLYMER SCIENCE
Nasrollah Majidian, Mahyar Saleh, Mohammad Samipourgiri
{"title":"Kinetics study of catalytic pyrolysis of polystyrene polymer using response surface method","authors":"Nasrollah Majidian,&nbsp;Mahyar Saleh,&nbsp;Mohammad Samipourgiri","doi":"10.1007/s13726-024-01362-1","DOIUrl":null,"url":null,"abstract":"<div><p>The present study investigates the kinetics of polystyrene catalytic pyrolysis using the response surface method. Polystyrene is one of the most widely used polymers that decomposes slowly in the environment. Two models (nth-order reaction and first-order reaction) have been employed to examine the catalytic pyrolysis process. One-liter hydrothermal reactor is filled with 100 g of polystyrene granules that have an estimated diameter of 1 mm and an Iranian natural zeolite catalyst. 100 mL of <i>n</i>-hexane and the catalyst are added to the reactor for improved mixing and to stop the catalyst particles from escaping. Then, the reactor is sealed and when the polymer melts down, nitrogen gas is injected with a flow rate of 100 mL/min. Three variables of time (30–120 min), temperature (100–300 °C), and the amount of catalyst (2, 4, 6 g) were selected as independent variables. For statistical analysis, the second-order model (response surface methodology) was used to find the relationship between independent and dependent variables. The results have shown that temperature and time have a significant effect on pyrolysis efficiency and the Group Method of Data Handling neural network was used to investigate the effect of parameters such as time, temperature, amount of catalyst, polystyrene amount, and pyrolysis mass volume. The findings illustrated that temperature has the greatest effect on the pyrolysis product and the results of kinetic investigation have shown that the nth-order reaction is more suitable for the kinetic justification of all experimental data because the degree of compatibility between experimental data and modeling results is higher than the first-order reaction.</p><h3>Graphical abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":601,"journal":{"name":"Iranian Polymer Journal","volume":null,"pages":null},"PeriodicalIF":2.4000,"publicationDate":"2024-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Iranian Polymer Journal","FirstCategoryId":"92","ListUrlMain":"https://link.springer.com/article/10.1007/s13726-024-01362-1","RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"POLYMER SCIENCE","Score":null,"Total":0}
引用次数: 0

Abstract

The present study investigates the kinetics of polystyrene catalytic pyrolysis using the response surface method. Polystyrene is one of the most widely used polymers that decomposes slowly in the environment. Two models (nth-order reaction and first-order reaction) have been employed to examine the catalytic pyrolysis process. One-liter hydrothermal reactor is filled with 100 g of polystyrene granules that have an estimated diameter of 1 mm and an Iranian natural zeolite catalyst. 100 mL of n-hexane and the catalyst are added to the reactor for improved mixing and to stop the catalyst particles from escaping. Then, the reactor is sealed and when the polymer melts down, nitrogen gas is injected with a flow rate of 100 mL/min. Three variables of time (30–120 min), temperature (100–300 °C), and the amount of catalyst (2, 4, 6 g) were selected as independent variables. For statistical analysis, the second-order model (response surface methodology) was used to find the relationship between independent and dependent variables. The results have shown that temperature and time have a significant effect on pyrolysis efficiency and the Group Method of Data Handling neural network was used to investigate the effect of parameters such as time, temperature, amount of catalyst, polystyrene amount, and pyrolysis mass volume. The findings illustrated that temperature has the greatest effect on the pyrolysis product and the results of kinetic investigation have shown that the nth-order reaction is more suitable for the kinetic justification of all experimental data because the degree of compatibility between experimental data and modeling results is higher than the first-order reaction.

Graphical abstract

Abstract Image

Abstract Image

利用响应面法对聚苯乙烯聚合物催化热解进行动力学研究
本研究采用响应面法研究了聚苯乙烯催化热解动力学。聚苯乙烯是最广泛使用的聚合物之一,在环境中分解缓慢。我们采用了两种模型(正阶反应和一阶反应)来研究催化热解过程。在一升水热反应器中装入 100 克估计直径为 1 毫米的聚苯乙烯颗粒和伊朗天然沸石催化剂。向反应器中加入 100 毫升正己烷和催化剂,以改善混合效果并阻止催化剂颗粒逸出。然后密封反应器,当聚合物熔化后,以 100 mL/min 的流速注入氮气。选择时间(30-120 分钟)、温度(100-300 °C)和催化剂用量(2、4、6 克)这三个变量作为自变量。在统计分析中,采用了二阶模型(响应面法)来找出自变量和因变量之间的关系。结果表明,温度和时间对热解效率有显著影响,并采用分组数据处理法神经网络研究了时间、温度、催化剂用量、聚苯乙烯用量和热解质量体积等参数的影响。研究结果表明,温度对热解产物的影响最大,动力学研究结果表明,由于实验数据与建模结果之间的吻合程度高于一阶反应,因此 nth 阶反应更适合用于所有实验数据的动力学论证。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
求助全文
约1分钟内获得全文 求助全文
来源期刊
Iranian Polymer Journal
Iranian Polymer Journal 化学-高分子科学
CiteScore
4.90
自引率
9.70%
发文量
107
审稿时长
2.8 months
期刊介绍: Iranian Polymer Journal, a monthly peer-reviewed international journal, provides a continuous forum for the dissemination of the original research and latest advances made in science and technology of polymers, covering diverse areas of polymer synthesis, characterization, polymer physics, rubber, plastics and composites, processing and engineering, biopolymers, drug delivery systems and natural polymers to meet specific applications. Also contributions from nano-related fields are regarded especially important for its versatility in modern scientific development.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信