Utilizing Immobilized Biocatalysts on Activated Carbon Black Adsorbents for Carbon Dioxide Capture from Simulated Ambient Air Under a PH Swing Adsorption Process PDF Download
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Author: Antonio Cuesta
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Adsorbent-based carbon capture is only feasible if adsorption-desorption cycles are both fully regenerating and economical. A potentially energy-saving and regenerating pH swing system is currently utilized by biocatalysts. The main objective is to develop, test and analyze a synthetic pH Swing Adsorption (pHSA) system as well as a pHSA compatible solid adsorbent to capture CO2 from a simulated ambient air gas stream. Furthermore, comparing its performance to other CO2 sorbent systems is necessary to determine the feasibility of pHSA implementation. The lead developed adsorbent is a carbon black co-activated with potassium carbonate and nitrogenous copolymer that is impregnated with immobilized bovine carbonic anhydrase and thereby deemed BCA/KN-CB. BCA/KN-CB has preliminarily demonstrated both a competitive CO2 adsorption capacity and a limited regenerative ability under experimental pHSA conditions. In addition, BCA-based adsorbents achieved higher adsorption capacities than non-BCA adsorbent counterparts. BCA-based adsorbents displayed better regenerative stability when the adsorbent was chemically activated with K2CO3. The point of zero charge of adsorbents BCA/KN-CB and KN-CB showed change between pHSA steps and came close to returning to the initial point of zero charge after one pHSA cycle. While the cost of the biocatalyst easily makes its use for CO2 capture impractical, the operational and remaining material costs are competitive to MSA and TSA solid adsorbent systems. The scientific contribution of the thesis is the concept of a pH swing adsorption/biocatalytic adsorbent system that can effectively operate under ambient conditions and has competitive CO2 adsorption capacities compared against other swing adsorption CO2 capture systems.
Author: Antonio Cuesta
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Adsorbent-based carbon capture is only feasible if adsorption-desorption cycles are both fully regenerating and economical. A potentially energy-saving and regenerating pH swing system is currently utilized by biocatalysts. The main objective is to develop, test and analyze a synthetic pH Swing Adsorption (pHSA) system as well as a pHSA compatible solid adsorbent to capture CO2 from a simulated ambient air gas stream. Furthermore, comparing its performance to other CO2 sorbent systems is necessary to determine the feasibility of pHSA implementation. The lead developed adsorbent is a carbon black co-activated with potassium carbonate and nitrogenous copolymer that is impregnated with immobilized bovine carbonic anhydrase and thereby deemed BCA/KN-CB. BCA/KN-CB has preliminarily demonstrated both a competitive CO2 adsorption capacity and a limited regenerative ability under experimental pHSA conditions. In addition, BCA-based adsorbents achieved higher adsorption capacities than non-BCA adsorbent counterparts. BCA-based adsorbents displayed better regenerative stability when the adsorbent was chemically activated with K2CO3. The point of zero charge of adsorbents BCA/KN-CB and KN-CB showed change between pHSA steps and came close to returning to the initial point of zero charge after one pHSA cycle. While the cost of the biocatalyst easily makes its use for CO2 capture impractical, the operational and remaining material costs are competitive to MSA and TSA solid adsorbent systems. The scientific contribution of the thesis is the concept of a pH swing adsorption/biocatalytic adsorbent system that can effectively operate under ambient conditions and has competitive CO2 adsorption capacities compared against other swing adsorption CO2 capture systems.
Author: Peter Grunwald
Publisher: MDPI
ISBN: 3038973181
Category : Science
Languages : en
Pages : 511
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Book Description
This book is a printed edition of the Special Issue "Immobilized Biocatalysts" that was published in Catalysts
Author: Winfried Hartmeier
Publisher: Springer Science & Business Media
ISBN: 3642733646
Category : Science
Languages : en
Pages : 217
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Book Description
Biotechnological processes often require the use of immobilized biocatalysts. This translation of the most successful German edition introduces the theoretical background of this rapidly growing field followed by a detailed description of the various techniques of immobilizing, characterizing, and using biocatalysts. The comprehensive discussion of possible applications in industrial processes and in basic research results in a practical guide for everyone involved in these techniques. Furthermore, some selected experiments are added in order to facilitate the understanding of the theoretical reports.
Author: Qiang Wang
Publisher: Royal Society of Chemistry
ISBN: 1788011090
Category : Science
Languages : en
Pages : 318
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Book Description
An introduction to the different inorganic adsorbents/sorbents used in post-combustion carbon dioxide capture.
Author: Peter Grunwald
Publisher:
ISBN: 9783038973195
Category :
Languages : en
Pages :
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Book Description
Biocatalysts (enzymes and whole cells) catalyze reactions with the advantage of superior chemo-, regio-, and stereo-specificity in mild conditions, thereby avoiding the production of larger amounts of waste. The currently great practical importance of immobilized biocatalysts is expressed by the high number of scientific publications together with an ever increasing number of different applications in this area of enzyme technology. This mainly relies on new research results with respect to immobilization techniques and the development of advanced carrier materials designed for this purpose. The employment of immobilized biocatalysts is one of the most effective and powerful tools used in the modern chemical industry as a prerequisite for an economical and environmentally friendly production process. The book presented here reflects the currently great practical importance of immobilized biocatalysts by means of a variety of actual examples. They comprise the immobilization of enzymes from different enzyme classes and a variety of whole cells with particular importance for the production of compounds for application in the chemical, pharmaceutical and food industry (in part from renewable resources), biohydrogen production, the fabrication of biosensors, and the treatment of waste water. Several articles introduce new research results with respect to immobilization techniques and the development of carrier materials designed for this purpose. In addition, review articles provide among others an overview of the industrial application of immobilized biocatalysts in various areas including the energy sector, or discuss the many advantages of metal-organic frameworks (MOFs) as platforms for enzyme immobilization. They deal with the pros and cons of many inorganic, organic, hybrid and composite materials, including nano-supports, used for the immobilization of biocatalysts, and with the development of engineered strains applied to the conversion of lignocellulosic biomass to platform chemicals by consolidated bioprocessing. In summary, the articles meet the state of the art of both scientific and technical standards and the book is indispensable for all those involved in the various aspects of this topic.
Author: Yong Kook Cho
Publisher:
ISBN:
Category :
Languages : en
Pages : 282
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Book Description
Author: Virginia Hernández Montoya
Publisher: BoD – Books on Demand
ISBN: 9535101978
Category : Science
Languages : en
Pages : 104
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Book Description
The present book discusses the principal lignocellulosic precursors used in the elaboration of activated carbons in different countries such as Asia, America, Europe and Africa; the different methods and experimental conditions employed in the synthesis of activated carbons, including one analysis of the principal stages of the preparation such as carbonization and activation (i.e., chemical or physical activation). Also, the recent and more specialized techniques used in the characterization of activated carbons are discussed in this book. For example, the techniques employed to determine textural parameters (mercury porosimetry and gas adsorption isotherms at 77 K) and different spectroscopies to determine chemical functionality (Raman, FT-IR, etc.) and other X-Ray techniques. Additionally, an overview of the application of activated carbons obtained from lignocellulosic precursors for wastewater treatment. Specifically, the analysis and discussion are focused on the advantages and capabilities of activated carbons for the removal of relevant toxic compounds and pollutants from water such as heavy metals, dyes, phenol, etc. Finally, the use of pyrolysis method for the valorization of two Mexican typical agricultural wastes (orange peel and pecan nut shell) for energy and carbon production is considered in this book.
Author: Peter Wildermuth
Publisher:
ISBN:
Category : Carbon dioxide mitigation
Languages : en
Pages : 54
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Book Description
A system was designed and built for testing activated charcoal as a regenerative carbon dioxide adsorbent in an atmosphere involving oxygen pressures of 240-275 mm Hg. The system gas flow rate was 160-340 liters/minute. The gas stream was composed of oxygen, humidified to 50%. Carbon dioxide was added to simulate the production rate of two men. Because of the sub- atmospheric operation, the system was a closed loop design and any carbon dioxide not adsorbed on the first pass through the charcoal continued to circulate through the system. The charcoal was subjected to an ambient room temperature of approximately 27C, and the gas stream controlled at 26.7 plus or minus 2.7C during the adsorption testing. Regeneration of the charcoal was by vacuum. The testing program demonstrated that charcoal will continue to adsorb carbon dioxide at a significant rate after repeated cycling with no apparent change or degradation. The presence of water vapor in the gas stream tends to reduce the capacity of the charcoal for adsorbing carbon dioxide. However, it is readily removed from the charcoal by vacuum and exhibits no cumulative effect on the carbon dioxide adsorptive capacity of the charcoal.
Author: Jerry. R. Perrich
Publisher: CRC Press
ISBN: 1351086367
Category : Technology & Engineering
Languages : en
Pages : 268
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Book Description
This volume is a guide to the state of the art of activated carbon adsorption technology as applied to wastewater treatment. This book surveys this body of knowledge and is a detailed description of current technology.
Author: Nikhil Mittal
Publisher:
ISBN:
Category : Amines
Languages : en
Pages : 146
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Book Description
This work is divided into two parts: (1) Synthesis of amine functionalized adsorbents using grafting technique for post-combustion CO[subscript 2] capture, (2) Performance evaluation of structured bed configuration with straight gas flow channels using amine impregnated adsorbent for post-combustion CO[subscript 2] capture. Brief description of each part is given below: (1)N-(3-trimethoxysilylpropyl)diethylenetriamine (DAEAPTS) grafted SBA-15 adsorbents were synthesized for CO[subscript 2] capture. The adsorption of CO[subscript 2] on the amine-grafted sorbents was measured by thermogravimetric method over a CO[subscript 2] partial pressure range of 8-101.3 kPa and a temperature range of 25-105 °C under atmospheric pressure. The optimal amine loaded SBA-15 adsorbent was examined for multi-cycle stability and adsorption/desorption kinetics. (2)The performance of structured bed and packed bed configurations for post-combustion CO[subscript 2] capture was evaluated using PEI impregnated SBA-15 adsorbent. The effect of adsorption temperature (25-90 °C), adsorption /desorption kinetics and multi-cycle stability was studied in both structured and packed bed configurations.
