Simulation of Spray Polymerisation and Structure Generation in Spray Drying by Single Droplet Models
Spray polymerisation has a long time been discussed as a promising process, yet, with little knowledge on cause-and-effect relationships between drying and chemical reactions. This work develops a new single droplet model of combined solution drying and free radical homopolymerisation, based on the...
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| Formaat: | Online |
| Taal: | Engels |
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Logos Verlag Berlin
2023
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| Online toegang: | ONIX_20230123_9783832555757_20 |
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| _version_ | 1869529878083141632 |
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| author | Säckel, Winfried |
| author_browse | Säckel, Winfried |
| author_facet | Säckel, Winfried |
| author_sort | Säckel, Winfried |
| collection | Directory of Open Access Books |
| description | Spray polymerisation has a long time been discussed as a promising process, yet, with little knowledge on cause-and-effect relationships between drying and chemical reactions. This work develops a new single droplet model of combined solution drying and free radical homopolymerisation, based on the method of moments. New, consistent approaches for moments’ diffusion and the reaction-diffusion system are derived to ensure conservation. Simulations reveal peculiarities of the process such as that, due to drying, polymerisation happens mostly in bulk and monomer evaporation leads to a poor yield. Various process variants and simulation models are discussed. The impact of process parameters is examined by means of numerical DoEs. The second part presents a novel approach for the simulation of structure evolution in suspension drying. The meshfree SPH method is used to model the relevant physical effects on a detailed scale during the first and second drying period. New implementations of physical effects are derived: heat and mass transfer based on linear driving forces, an implicit solution of the heat equation, several approaches for crust formation and a new formulation of surface tension by pairwise forces. The formation of dense structures as well as hollow granules can be simulated. Model parameters influence crust formation during the second drying period concerning shape and microporosity and can be interpreted in a physical sense. |
| format | Online |
| id | doab-20.500.12854ir-96290 |
| institution | Directory of Open Access Books |
| language | eng |
| publishDate | 2023 |
| publishDateRange | 2023 |
| publishDateSort | 2023 |
| publisher | Logos Verlag Berlin |
| publisherStr | Logos Verlag Berlin |
| record_format | ojs |
| spelling | doab-20.500.12854ir-962902024-04-11T15:10:51Z Simulation of Spray Polymerisation and Structure Generation in Spray Drying by Single Droplet Models Säckel, Winfried Spray Polymerisation Spray Drying Single Droplet Model SPH Simulation thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TD Industrial chemistry and manufacturing technologies Spray polymerisation has a long time been discussed as a promising process, yet, with little knowledge on cause-and-effect relationships between drying and chemical reactions. This work develops a new single droplet model of combined solution drying and free radical homopolymerisation, based on the method of moments. New, consistent approaches for moments’ diffusion and the reaction-diffusion system are derived to ensure conservation. Simulations reveal peculiarities of the process such as that, due to drying, polymerisation happens mostly in bulk and monomer evaporation leads to a poor yield. Various process variants and simulation models are discussed. The impact of process parameters is examined by means of numerical DoEs. The second part presents a novel approach for the simulation of structure evolution in suspension drying. The meshfree SPH method is used to model the relevant physical effects on a detailed scale during the first and second drying period. New implementations of physical effects are derived: heat and mass transfer based on linear driving forces, an implicit solution of the heat equation, several approaches for crust formation and a new formulation of surface tension by pairwise forces. The formation of dense structures as well as hollow granules can be simulated. Model parameters influence crust formation during the second drying period concerning shape and microporosity and can be interpreted in a physical sense. 2023-01-23T08:10:47Z 2023-01-23T08:10:47Z 2022 book ONIX_20230123_9783832555757_20 9783832555757 https://directory.doabooks.org/handle/20.500.12854/96290 eng image/jpeg Attribution-NonCommercial-NoDerivatives 4.0 International https://www.logos-verlag.de/cgi-bin/engbuchmid?isbn=5575&lng=eng&id= https://www.logos-verlag.de/ebooks/OA/978-3-8325-5575-7.pdf Logos Verlag Berlin Logos Verlag Berlin 04b263a1-7fba-4491-9eae-1c394ac42fc3 9783832555757 Logos Verlag Berlin 328 Berlin/Germany open access |
| spellingShingle | Spray Polymerisation Spray Drying Single Droplet Model SPH Simulation thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TD Industrial chemistry and manufacturing technologies Säckel, Winfried Simulation of Spray Polymerisation and Structure Generation in Spray Drying by Single Droplet Models |
| title | Simulation of Spray Polymerisation and Structure Generation in Spray Drying by Single Droplet Models |
| title_full | Simulation of Spray Polymerisation and Structure Generation in Spray Drying by Single Droplet Models |
| title_fullStr | Simulation of Spray Polymerisation and Structure Generation in Spray Drying by Single Droplet Models |
| title_full_unstemmed | Simulation of Spray Polymerisation and Structure Generation in Spray Drying by Single Droplet Models |
| title_short | Simulation of Spray Polymerisation and Structure Generation in Spray Drying by Single Droplet Models |
| title_sort | simulation of spray polymerisation and structure generation in spray drying by single droplet models |
| topic | Spray Polymerisation Spray Drying Single Droplet Model SPH Simulation thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TD Industrial chemistry and manufacturing technologies |
| topic_facet | Spray Polymerisation Spray Drying Single Droplet Model SPH Simulation thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TD Industrial chemistry and manufacturing technologies |
| url | ONIX_20230123_9783832555757_20 |
| work_keys_str_mv | AT sackelwinfried simulationofspraypolymerisationandstructuregenerationinspraydryingbysingledropletmodels |