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Microwaves for Intensified Chemical Manufacturing: Applications to Biomass Processing.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Microwaves for Intensified Chemical Manufacturing: Applications to Biomass Processing./
作者:	Baker-Fales, Montgomery.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2023,
面頁冊數:	261 p.
附註:	Source: Dissertations Abstracts International, Volume: 85-03, Section: B.
Contained By:	Dissertations Abstracts International85-03B.
標題:	Chemical engineering. -
電子資源:	https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=30575533
ISBN:	9798380373272

Microwaves for Intensified Chemical Manufacturing: Applications to Biomass Processing.
Baker-Fales, Montgomery.

Microwaves for Intensified Chemical Manufacturing: Applications to Biomass Processing. - Ann Arbor : ProQuest Dissertations & Theses, 2023 - 261 p.

Source: Dissertations Abstracts International, Volume: 85-03, Section: B.

Thesis (D.Eng.)--University of Delaware, 2023.

This item must not be sold to any third party vendors.

Greenhouse gas emissions (GHGs) and sustainability are incredibly important topics affecting the chemical industry today. While significant efforts are underway to reduce GHGs by addressing feedstocks, manufacturing, and products, maintaining viable process economics requires careful tailoring of solutions. For example, process intensification (PI) may be implemented because it improves efficiency and profitability in many cases. On the other hand, process electrification addresses GHGs from manufacturing more directly, but is not as readily adopted due to the expenses of industrial electricity exceeding the cost of fossil fuels. A new class of electrification technologies such as microwaves (MWs) can be used to enable PI in ways conventional heating cannot. These MW "co-benefits" include direct, volumetric, and selective heating, and may be used to enhance process performance. Currently, understanding of reported MW-enhancements of various processes is lacking and design and implementation principles for MW reactors need to be developed. This thesis aims to build understanding of MWs as a co-beneficial electrification technology for chemical manufacturing, targeting the production of HMF from bio-derived sugars for enhancement via PI.The first focus of this dissertation is the expansion of sensing methodologies for and in MW-heated environments. We detail the design and implementation of a simple benchtop approach for quantifying complex dielectric permittivity - a critical property for predicting MW heating behavior - for liquids at variable temperatures. We report temperature-dependent datasets for water, alcohols, organic solvents, and{A0}hydrochloric acid solutions. To effectively measure temperature, a new methodology was implemented for submergible optical fibers to directly measure temperature in pressurized, MW-heated flows for the first time. New thermometry approaches paint a vivid portrait: in MW-heated systems, temperature varies tremendously in both time and space.{A0}The second focus of this dissertation is building understanding of MW effects on chemical processes and implementing effective MW processes. A modular MW flow reactor is demonstrated. A joint computational fluid dynamic (CFD) and machine learning (ML) framework is implemented for quick optimization of the reactor geometry for optimal heating efficiency. A modular MW-assisted continuous flow system for high flowrate HMF production from fructose is then showcased, representing a 36-times scale up. With the implementation of heat recirculation, more than 200 mL/min is heated to produce HMF at 0.1 kg/hr - an 8-times increase upon conventionally heated approaches.We demonstrate temperature gradients in MW-heated liquid-liquid systems for the first time. Because MWs selectively heat the aqueous phase, a {CE}{94}T develops which is affected by process variables such as input power, dielectric properties, and surface area between solvents. A simple analytical model is shown to be predictive of {CE}{94}T, enabling the design of systems with large temperature gradients. The effect of {CE}{94}T on the extraction of HMF and reactive extractions is explored. By introducing a cooler organic phase via MW-induced temperature gradients, the partitioning of HMF (KHMF) shifts toward the organic phase. The temperature of the liquid-liquid interface is found to set the partitioning performance. COSMO-RS is used to estimate the effect of MWs on >500 solvents, and several candidates are predicted to exhibit superior performance{A0}(>50% KHMF boosts). CFD and experiments are both used to show that MWs increase the extraction efficiency and the volumetric mass transfer coefficient \uD835\uDC58\uD835\uDC3F\uD835\uDC4E because of a Rayleigh instability caused by the density difference due to the temperature difference. The combined partitioning and mass transfer enhancement are predicted to grant significant advantages to HMF yield in reactive extractions.{A0}

ISBN: 9798380373272Subjects--Topical Terms:

560457
Chemical engineering.
Subjects--Index Terms:

Biomass processing

Microwaves for Intensified Chemical Manufacturing: Applications to Biomass Processing.
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100 1 $a Baker-Fales, Montgomery. $3 3766808
245 1 0 $a Microwaves for Intensified Chemical Manufacturing: Applications to Biomass Processing.
260 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2023
300 $a 261 p.
500 $a Source: Dissertations Abstracts International, Volume: 85-03, Section: B.
500 $a Advisor: Vlachos, Dionisios G.
502 $a Thesis (D.Eng.)--University of Delaware, 2023.
506 $a This item must not be sold to any third party vendors.
520 $a Greenhouse gas emissions (GHGs) and sustainability are incredibly important topics affecting the chemical industry today. While significant efforts are underway to reduce GHGs by addressing feedstocks, manufacturing, and products, maintaining viable process economics requires careful tailoring of solutions. For example, process intensification (PI) may be implemented because it improves efficiency and profitability in many cases. On the other hand, process electrification addresses GHGs from manufacturing more directly, but is not as readily adopted due to the expenses of industrial electricity exceeding the cost of fossil fuels. A new class of electrification technologies such as microwaves (MWs) can be used to enable PI in ways conventional heating cannot. These MW "co-benefits" include direct, volumetric, and selective heating, and may be used to enhance process performance. Currently, understanding of reported MW-enhancements of various processes is lacking and design and implementation principles for MW reactors need to be developed. This thesis aims to build understanding of MWs as a co-beneficial electrification technology for chemical manufacturing, targeting the production of HMF from bio-derived sugars for enhancement via PI.The first focus of this dissertation is the expansion of sensing methodologies for and in MW-heated environments. We detail the design and implementation of a simple benchtop approach for quantifying complex dielectric permittivity - a critical property for predicting MW heating behavior - for liquids at variable temperatures. We report temperature-dependent datasets for water, alcohols, organic solvents, and{A0}hydrochloric acid solutions. To effectively measure temperature, a new methodology was implemented for submergible optical fibers to directly measure temperature in pressurized, MW-heated flows for the first time. New thermometry approaches paint a vivid portrait: in MW-heated systems, temperature varies tremendously in both time and space.{A0}The second focus of this dissertation is building understanding of MW effects on chemical processes and implementing effective MW processes. A modular MW flow reactor is demonstrated. A joint computational fluid dynamic (CFD) and machine learning (ML) framework is implemented for quick optimization of the reactor geometry for optimal heating efficiency. A modular MW-assisted continuous flow system for high flowrate HMF production from fructose is then showcased, representing a 36-times scale up. With the implementation of heat recirculation, more than 200 mL/min is heated to produce HMF at 0.1 kg/hr - an 8-times increase upon conventionally heated approaches.We demonstrate temperature gradients in MW-heated liquid-liquid systems for the first time. Because MWs selectively heat the aqueous phase, a {CE}{94}T develops which is affected by process variables such as input power, dielectric properties, and surface area between solvents. A simple analytical model is shown to be predictive of {CE}{94}T, enabling the design of systems with large temperature gradients. The effect of {CE}{94}T on the extraction of HMF and reactive extractions is explored. By introducing a cooler organic phase via MW-induced temperature gradients, the partitioning of HMF (KHMF) shifts toward the organic phase. The temperature of the liquid-liquid interface is found to set the partitioning performance. COSMO-RS is used to estimate the effect of MWs on >500 solvents, and several candidates are predicted to exhibit superior performance{A0}(>50% KHMF boosts). CFD and experiments are both used to show that MWs increase the extraction efficiency and the volumetric mass transfer coefficient \uD835\uDC58\uD835\uDC3F\uD835\uDC4E because of a Rayleigh instability caused by the density difference due to the temperature difference. The combined partitioning and mass transfer enhancement are predicted to grant significant advantages to HMF yield in reactive extractions.{A0}
590 $a School code: 0060.
650 4 $a Chemical engineering. $3 560457
650 4 $a Environmental science. $3 677245
650 4 $a Computational chemistry. $3 3350019
653 $a Biomass processing
653 $a Electrification technologies
653 $a Microwaves
653 $a Process intensification
653 $a Reaction engineering
690 $a 0542
690 $a 0768
690 $a 0219
710 2 $a University of Delaware. $b Chemical Engineering. $3 3178390
773 0 $t Dissertations Abstracts International $g 85-03B.
790 $a 0060
791 $a D.Eng.
792 $a 2023
793 $a English
856 4 0 $u https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=30575533