Nanoclay-based Solid-amine Adsorbents for Carbon Dioxide Capture PDF Download
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Author: Elliot A. Roth
Publisher:
ISBN:
Category : Carbon dioxide
Languages : en
Pages :
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Author: Elliot A. Roth
Publisher:
ISBN:
Category : Carbon dioxide
Languages : en
Pages :
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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.
Author: Hui Jiang
Publisher:
ISBN:
Category : Amines
Languages : en
Pages : 52
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Book Description
Amine-functionalized solid adsorbents have gained attention within the last decade for their application in carbon dioxide capture, due to their many advantages such as low energy cost for regeneration, tunable structure, elimination of corrosion problems, and additional advantages. However, one of the challenges facing this technology is to accomplish both high CO2 capture capacity along with high CO2 diffusion rates concurrently. Current amine-based solid sorbents such as porous materials similar to SBA-15 have large pores diffusion entering molecules; however, the pores become clogged upon amine inclusion. To meet this challenge, our group's solution involves the creation of a new type of material which we are calling-amino-pillared nanosheet (APN) adsorbents which are generated from layered nanosheet precursors. These materials are being proposed because of their unique lamellar structure which exhibits ability to be modified by organic or inorganic pillars through consecutive swelling and pillaring steps to form large mesoporous interlayer spaces. After the expansion of the layer space through swelling and pillaring, the large pore space can be functionalized with amine groups. This selective functionalization is possible by the choice of amine group introduced. Our choice, large amine molecules, do not access the micropore within each layer; however, either physically or chemically immobilized onto the surface of the mesoporous interlayer space between each layer. The final goal of the research is to investigate the ability to prepare APN adsorbents from a model nanoporous layered materials including nanosheets precursor material MCM-22(P) and nanoporous layered silicate material AMH-3. MCM-22(P) contains 2-dimensional porous channels, 6 membered rings (MB) openings perpendicular to the layers and 10 MB channels in the plane of the layers.1 However, the transport limiting openings (6 MB) to the layers is smaller than CO2 gas molecules.2,3 In contrast, AMH-3 has 3D microporous layers with 8 MB openings in the plane of the layers, as well as perpendicular to the layers, which are larger than CO2 molecules. Based on the structure differences between nanosheets precursor material MCM-22(P) and nanoporous layered silicate material AMH-3, the latter might be more suitable for CO2 capturer application as an APN candidate material. However, none of the assumptions above have been approved experimentally. In this study, the influence of the amine loading on adsorption capacity and kinetics of adsorption for the mixed porosity material pillared MCM-22 (P) (also called MCM-36) is studied systematically, in order to determine a potential route to achieve a final material with both high amine loading and high adsorption capacity. We first synthesized MCM-22(P), followed by swelling and pillaring to create MCM-36. Polymeric amines such as polyethylenimine (PEI) are used as an organic component of the supported amine adsorbents, with varying polymer loadings within the adsorbents used. The kinetics and diffusion properties of carbon dioxide capture on a MCM-36 pillared material impregnated with amine containing Polyethylenimine polymers has been investigated. It was determined that the introduction of amine polymer cannot be used to improve the capture capacity of the support over that of the bare material, due to the fact that with the addition of a high loading of amine polymer the large pore diffusion channels become impossible for carbon dioxide molecules to diffuse through. This sets an upper limit to the capture capacity of polymer impregnated MCM-36 for carbon dioxide which does not surpass that for the initial bare material, and greatly reduces the utility of using this sort of amine-solid adsorbent for carbon capture plans in the future.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 362
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Author: Will Travis
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Author: M. L. Gray
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author:
Publisher: Elsevier
ISBN: 0323939414
Category : Science
Languages : en
Pages : 4061
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Book Description
Encyclopedia of Renewable Energy, Sustainability and the Environment, Four Volume Set comprehensively covers all renewable energy resources, including wind, solar, hydro, biomass, geothermal energy, and nuclear power, to name a few. In addition to covering the breadth of renewable energy resources at a fundamental level, this encyclopedia delves into the utilization and ideal applications of each resource and assesses them from environmental, economic, and policy standpoints. This book will serve as an ideal introduction to any renewable energy source for students, while also allowing them to learn about a topic in more depth and explore related topics, all in a single resource.Instructors, researchers, and industry professionals will also benefit from this comprehensive reference. - Covers all renewable energy technologies in one comprehensive resource - Details renewable energies' processes, from production to utilization in a single encyclopedia - Organizes topics into concise, consistently formatted chapters, perfect for readers who are new to the field - Assesses economic challenges faced to implement each type of renewable energy - Addresses the challenges of replacing fossil fuels with renewables and covers the environmental impacts of each renewable energy
Author: Robert S. Franchi
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Book Description
Carbon dioxide is a ubiquitous species that has received much attention particularly because of its greenhouse gas effect. Whether because of environmental constraints or technical reasons, various industries are faced with the task of removing CO2 from gas mixtures containing a wide range of species in different concentrations. The most commonly employed technologies for this separation are gas-liquid absorption with aqueous solutions of alkanolamines and gas-solid adsorption with zeolites. To benefit from the advantages of each of these separation technologies, a porous solid support was impregnated with an alkanolamine to develop a high capacity, water tolerant adsorbent for CO2. During the course of the developmental study, several amines were considered for impregnation, and it was decided to use diethanolamine (DEA) for further studies. Supports that were examined were activated carbon, silica gel, MCM-41 and pore-expanded MCM-41 (PE-MCM-41) silicas. (Abstract shortened by UMI.).
Author: Sihan Wang
Publisher:
ISBN:
Category : Carbon sequestration
Languages : en
Pages :
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Book Description
Over loading of CO2 emission has been a severe environment problem and the fact of greenhouse issue has become a huge impact to our daily life. The largest and inevitable emission of CO2 gas is the coal-fired power plant, and the most commonly used CO2 capture sorbent is liquid amine. However, there are lots of inconvenience of using liquid amine including equipment corrosion, high regeneration energy and slow diffusion of the CO2 gas, which would cost the capture procedure a huge amount of expense. Nevertheless, the solid sorbent is in face of the issue that the capture capacities and SO2 resistance is really low. So in this research, the modified amine-functionalized solid sorbents for CO2 adsorption and SO2 resistance have been created. The problem of lower CO2 capture capacity was modified by double impregnation, and the issue of lower heat transfer rate was improved by adding heat transfer agent during pelletization. The characterization of the sorbent and pellets capture behavior was done by CO2 capture weight method and in-situ DRIFT spectra, and the SO2 resistance behavior has also been discussed with EDS mapping and quantification.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
A new method for making low-cost CO.sub. 2 sorbents that can be used in large-scale gas-solid processes. The new method entails treating a solid substrate with acid or base and simultaneous or subsequent treatment with a substituted amine salt. The method eliminates the need for organic solvents and polymeric materials for the preparation of CO.sub. 2 capture systems.
