Yield Optimization in a Cycled Trickle-Bed Reactor: Ethanol Catalytic Oxidation as a Case Study
The effect of slow ON-OFF liquid flow modulation on the yield of consecutive reactions is investigated for oxidation of aqueous ethanol solutions using a 0.5% Pd/Al 2O 3 commercial catalyst in a laboratory trickle-bed reactor. Experiments with modulated liquid flow rate (MLFR) were performed under t...
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09307516_v35_n5_p899_Ayude http://hdl.handle.net/20.500.12110/paper_09307516_v35_n5_p899_Ayude |
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paper:paper_09307516_v35_n5_p899_Ayude2023-06-08T15:52:33Z Yield Optimization in a Cycled Trickle-Bed Reactor: Ethanol Catalytic Oxidation as a Case Study Ayude, María Alejandra Cassanello Fernández, Miryam Celeste Catalytic oxidation Liquid flow modulation Trickle-bed reactor Acetic acid productions Aqueous ethanol solutions Commercial catalyst Consecutive reaction Cycling conditions Cycling frequencies Ethanol oxidation Frequency-tuning Hydrodynamic conditions Intermediate frequencies Intermediate product Liquid flow modulation Liquid flow rates Liquid hold ups Product distributions Product yields Trickle bed reactor Wet and dry cycles Yield optimization Acetic acid Aldehydes Catalysts Catalytic oxidation Chemical reactors Ethanol Experiments Flow rate Modulation Liquids The effect of slow ON-OFF liquid flow modulation on the yield of consecutive reactions is investigated for oxidation of aqueous ethanol solutions using a 0.5% Pd/Al 2O 3 commercial catalyst in a laboratory trickle-bed reactor. Experiments with modulated liquid flow rate (MLFR) were performed under the same hydrodynamic conditions (degree of wetting, liquid holdup) as experiments with constant liquid flow rate (CLFR). Thus, the impact of the duration of wet and dry cycles as well as the period can be independently investigated. Depending on cycling conditions, acetaldehyde or acetic acid production is favored with MLFR compared to CLFR. Results suggest both the opportunity and challenge of finding a way to tune the cycling parameters for producing the most appropriate product. ON-OFF liquid flow modulation in a trickle-bed reactor and its impact on the yield of ethanol oxidation in presence of a Pd/Al 2O 3 catalyst is studied. High cycling frequencies benefit the yield toward the intermediate product, while intermediate frequencies significantly increase the final product yield. As demonstrated, product distribution can be considerably modified through frequency tuning. © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. Fil:Ayude, A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Cassanello, M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2012 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09307516_v35_n5_p899_Ayude http://hdl.handle.net/20.500.12110/paper_09307516_v35_n5_p899_Ayude |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Catalytic oxidation Liquid flow modulation Trickle-bed reactor Acetic acid productions Aqueous ethanol solutions Commercial catalyst Consecutive reaction Cycling conditions Cycling frequencies Ethanol oxidation Frequency-tuning Hydrodynamic conditions Intermediate frequencies Intermediate product Liquid flow modulation Liquid flow rates Liquid hold ups Product distributions Product yields Trickle bed reactor Wet and dry cycles Yield optimization Acetic acid Aldehydes Catalysts Catalytic oxidation Chemical reactors Ethanol Experiments Flow rate Modulation Liquids |
| spellingShingle |
Catalytic oxidation Liquid flow modulation Trickle-bed reactor Acetic acid productions Aqueous ethanol solutions Commercial catalyst Consecutive reaction Cycling conditions Cycling frequencies Ethanol oxidation Frequency-tuning Hydrodynamic conditions Intermediate frequencies Intermediate product Liquid flow modulation Liquid flow rates Liquid hold ups Product distributions Product yields Trickle bed reactor Wet and dry cycles Yield optimization Acetic acid Aldehydes Catalysts Catalytic oxidation Chemical reactors Ethanol Experiments Flow rate Modulation Liquids Ayude, María Alejandra Cassanello Fernández, Miryam Celeste Yield Optimization in a Cycled Trickle-Bed Reactor: Ethanol Catalytic Oxidation as a Case Study |
| topic_facet |
Catalytic oxidation Liquid flow modulation Trickle-bed reactor Acetic acid productions Aqueous ethanol solutions Commercial catalyst Consecutive reaction Cycling conditions Cycling frequencies Ethanol oxidation Frequency-tuning Hydrodynamic conditions Intermediate frequencies Intermediate product Liquid flow modulation Liquid flow rates Liquid hold ups Product distributions Product yields Trickle bed reactor Wet and dry cycles Yield optimization Acetic acid Aldehydes Catalysts Catalytic oxidation Chemical reactors Ethanol Experiments Flow rate Modulation Liquids |
| description |
The effect of slow ON-OFF liquid flow modulation on the yield of consecutive reactions is investigated for oxidation of aqueous ethanol solutions using a 0.5% Pd/Al 2O 3 commercial catalyst in a laboratory trickle-bed reactor. Experiments with modulated liquid flow rate (MLFR) were performed under the same hydrodynamic conditions (degree of wetting, liquid holdup) as experiments with constant liquid flow rate (CLFR). Thus, the impact of the duration of wet and dry cycles as well as the period can be independently investigated. Depending on cycling conditions, acetaldehyde or acetic acid production is favored with MLFR compared to CLFR. Results suggest both the opportunity and challenge of finding a way to tune the cycling parameters for producing the most appropriate product. ON-OFF liquid flow modulation in a trickle-bed reactor and its impact on the yield of ethanol oxidation in presence of a Pd/Al 2O 3 catalyst is studied. High cycling frequencies benefit the yield toward the intermediate product, while intermediate frequencies significantly increase the final product yield. As demonstrated, product distribution can be considerably modified through frequency tuning. © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. |
| author |
Ayude, María Alejandra Cassanello Fernández, Miryam Celeste |
| author_facet |
Ayude, María Alejandra Cassanello Fernández, Miryam Celeste |
| author_sort |
Ayude, María Alejandra |
| title |
Yield Optimization in a Cycled Trickle-Bed Reactor: Ethanol Catalytic Oxidation as a Case Study |
| title_short |
Yield Optimization in a Cycled Trickle-Bed Reactor: Ethanol Catalytic Oxidation as a Case Study |
| title_full |
Yield Optimization in a Cycled Trickle-Bed Reactor: Ethanol Catalytic Oxidation as a Case Study |
| title_fullStr |
Yield Optimization in a Cycled Trickle-Bed Reactor: Ethanol Catalytic Oxidation as a Case Study |
| title_full_unstemmed |
Yield Optimization in a Cycled Trickle-Bed Reactor: Ethanol Catalytic Oxidation as a Case Study |
| title_sort |
yield optimization in a cycled trickle-bed reactor: ethanol catalytic oxidation as a case study |
| publishDate |
2012 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09307516_v35_n5_p899_Ayude http://hdl.handle.net/20.500.12110/paper_09307516_v35_n5_p899_Ayude |
| work_keys_str_mv |
AT ayudemariaalejandra yieldoptimizationinacycledtricklebedreactorethanolcatalyticoxidationasacasestudy AT cassanellofernandezmiryamceleste yieldoptimizationinacycledtricklebedreactorethanolcatalyticoxidationasacasestudy |
| _version_ |
1768544046770290688 |