Polymerization of Isobutylene in a Rotating Packed Bed Reactor: Experimental and Modeling Studies

Polymerization of isobutylene (IB) for synthesizing highly reactive polyisobutylene (HRPIB) is characterized by a complicated fast intrinsic reaction rate; therefore, the features of its products exhibit a strong dependence on mixing efficiency. To provide uniform and efficient mixing, a rotating pa...

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Autores principales:	Wenhui Hou, Wei Wang, Yang Xiang, Yingjiao Li, Guangwen Chu, Haikui Zou, Baochang Sun
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	polymerization of isobutylene highly reactive polyisobutylene rotating packed bed modeling Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/3c84d1f21526425c86de6e748c1a1238
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spelling	oai:doaj.org-article:3c84d1f21526425c86de6e748c1a12382021-11-11T15:15:03ZPolymerization of Isobutylene in a Rotating Packed Bed Reactor: Experimental and Modeling Studies10.3390/app1121101942076-3417https://doaj.org/article/3c84d1f21526425c86de6e748c1a12382021-10-01T00:00:00Zhttps://www.mdpi.com/2076-3417/11/21/10194https://doaj.org/toc/2076-3417Polymerization of isobutylene (IB) for synthesizing highly reactive polyisobutylene (HRPIB) is characterized by a complicated fast intrinsic reaction rate; therefore, the features of its products exhibit a strong dependence on mixing efficiency. To provide uniform and efficient mixing, a rotating packed bed was employed as a reactor for polymerization of IB. The effects of operating parameters including polymerization temperature (<i>T</i>), rotating speed (<i>N</i>) and relative dosage of monomers and initiating systems ([M]<sub>0</sub>/[I]<sub>0</sub>) on number-average molecular weight (<i>M<sub>n</sub></i>) of HRPIB were studied. HRPIB with <i>M<sub>n</sub></i> of 2550 g·mol<sup>−1</sup> and exo-olefin terminal content of 85 mol% were efficiently obtained at suitable conditions as <i>T</i> of 283 K, <i>N</i> of 1600 rpm and [M]<sub>0</sub>/[I]<sub>0</sub> of 49. Moreover, the <i>M<sub>n</sub></i> can be regulated by changing <i>T, N</i> and [M]<sub>0</sub>/[I]<sub>0</sub>. Based on the presumptive-steady-state analysis method and the coalescence–redispersion model, a model for prediction of the <i>M<sub>n</sub></i> was developed and validated, and the calculated <i>M<sub>n</sub></i> values agreed well with experimental results, with a deviation of ±10%. The results demonstrate that RPB is a promising reactor for synthesizing HRPIB, and the given model for <i>M</i><i><sub>n</sub></i> can be applied for the design of RPB and process optimization.Wenhui HouWei WangYang XiangYingjiao LiGuangwen ChuHaikui ZouBaochang SunMDPI AGarticlepolymerization of isobutylenehighly reactive polyisobutylenerotating packed bedmodelingTechnologyTEngineering (General). Civil engineering (General)TA1-2040Biology (General)QH301-705.5PhysicsQC1-999ChemistryQD1-999ENApplied Sciences, Vol 11, Iss 10194, p 10194 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	polymerization of isobutylene highly reactive polyisobutylene rotating packed bed modeling Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999
spellingShingle	polymerization of isobutylene highly reactive polyisobutylene rotating packed bed modeling Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999 Wenhui Hou Wei Wang Yang Xiang Yingjiao Li Guangwen Chu Haikui Zou Baochang Sun Polymerization of Isobutylene in a Rotating Packed Bed Reactor: Experimental and Modeling Studies
description	Polymerization of isobutylene (IB) for synthesizing highly reactive polyisobutylene (HRPIB) is characterized by a complicated fast intrinsic reaction rate; therefore, the features of its products exhibit a strong dependence on mixing efficiency. To provide uniform and efficient mixing, a rotating packed bed was employed as a reactor for polymerization of IB. The effects of operating parameters including polymerization temperature (<i>T</i>), rotating speed (<i>N</i>) and relative dosage of monomers and initiating systems ([M]<sub>0</sub>/[I]<sub>0</sub>) on number-average molecular weight (<i>M<sub>n</sub></i>) of HRPIB were studied. HRPIB with <i>M<sub>n</sub></i> of 2550 g·mol<sup>−1</sup> and exo-olefin terminal content of 85 mol% were efficiently obtained at suitable conditions as <i>T</i> of 283 K, <i>N</i> of 1600 rpm and [M]<sub>0</sub>/[I]<sub>0</sub> of 49. Moreover, the <i>M<sub>n</sub></i> can be regulated by changing <i>T, N</i> and [M]<sub>0</sub>/[I]<sub>0</sub>. Based on the presumptive-steady-state analysis method and the coalescence–redispersion model, a model for prediction of the <i>M<sub>n</sub></i> was developed and validated, and the calculated <i>M<sub>n</sub></i> values agreed well with experimental results, with a deviation of ±10%. The results demonstrate that RPB is a promising reactor for synthesizing HRPIB, and the given model for <i>M</i><i><sub>n</sub></i> can be applied for the design of RPB and process optimization.
format	article
author	Wenhui Hou Wei Wang Yang Xiang Yingjiao Li Guangwen Chu Haikui Zou Baochang Sun
author_facet	Wenhui Hou Wei Wang Yang Xiang Yingjiao Li Guangwen Chu Haikui Zou Baochang Sun
author_sort	Wenhui Hou
title	Polymerization of Isobutylene in a Rotating Packed Bed Reactor: Experimental and Modeling Studies
title_short	Polymerization of Isobutylene in a Rotating Packed Bed Reactor: Experimental and Modeling Studies
title_full	Polymerization of Isobutylene in a Rotating Packed Bed Reactor: Experimental and Modeling Studies
title_fullStr	Polymerization of Isobutylene in a Rotating Packed Bed Reactor: Experimental and Modeling Studies
title_full_unstemmed	Polymerization of Isobutylene in a Rotating Packed Bed Reactor: Experimental and Modeling Studies
title_sort	polymerization of isobutylene in a rotating packed bed reactor: experimental and modeling studies
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/3c84d1f21526425c86de6e748c1a1238
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Polymerization of Isobutylene in a Rotating Packed Bed Reactor: Experimental and Modeling Studies

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