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Factors affecting the removal of amm...

Petit, Camille.

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Factors affecting the removal of ammonia from air on carbonaceous materials: Investigation of reactive adsorption mechanism.

紀錄類型:	書目-語言資料,印刷品 : Monograph/item
正題名/作者:	Factors affecting the removal of ammonia from air on carbonaceous materials: Investigation of reactive adsorption mechanism./
作者:	Petit, Camille.
面頁冊數:	165 p.
附註:	Source: Dissertation Abstracts International, Volume: 72-05, Section: B, page: .
Contained By:	Dissertation Abstracts International72-05B.
標題:	Chemistry, Analytical. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3443922
ISBN:	9781124505725

Factors affecting the removal of ammonia from air on carbonaceous materials: Investigation of reactive adsorption mechanism.
Petit, Camille.

Factors affecting the removal of ammonia from air on carbonaceous materials: Investigation of reactive adsorption mechanism. - 165 p.

Source: Dissertation Abstracts International, Volume: 72-05, Section: B, page: .

Thesis (Ph.D.)--City University of New York, 2011.

Air pollution related to the release of industrial toxic gases, represents one of the main concerns of our modern world owing to its detrimental effect on the environment. To tackle this growing issue, efficient ways to reduce/control the release of pollutants are required. Adsorption of gases on porous materials appears as a potential solution. However, the physisorption of small molecules of gases such as ammonia is limited at ambient conditions. For their removal, adsorbents providing strong adsorption forces must be used/developed.

ISBN: 9781124505725Subjects--Topical Terms:

586156
Chemistry, Analytical.

Factors affecting the removal of ammonia from air on carbonaceous materials: Investigation of reactive adsorption mechanism.
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245 1 0 $a Factors affecting the removal of ammonia from air on carbonaceous materials: Investigation of reactive adsorption mechanism.
300 $a 165 p.
500 $a Source: Dissertation Abstracts International, Volume: 72-05, Section: B, page: .
500 $a Adviser: Teresa J. Bandosz.
502 $a Thesis (Ph.D.)--City University of New York, 2011.
520 $a Air pollution related to the release of industrial toxic gases, represents one of the main concerns of our modern world owing to its detrimental effect on the environment. To tackle this growing issue, efficient ways to reduce/control the release of pollutants are required. Adsorption of gases on porous materials appears as a potential solution. However, the physisorption of small molecules of gases such as ammonia is limited at ambient conditions. For their removal, adsorbents providing strong adsorption forces must be used/developed.
520 $a In this study, new carbon-based materials are prepared and tested for ammonia adsorption at ambient conditions. Characterization of the adsorbents' texture and surface chemistry is performed before and after exposure to ammonia to identify the features responsible for high adsorption capacity and for controlling the mechanisms of retention. The characterization techniques include: nitrogen adsorption, thermal analysis, potentiometric titration, FT-IR spectroscopy, X-ray diffraction, Energy Dispersive X-ray spectroscopy, X-ray photoelectron spectroscopy and Electron Microscopy.
520 $a The results obtained indicate that ammonia removal is governed by the adsorbent's surface chemistry. On the contrary, porosity (and thus physisorption) plays a secondary role in this process, unless strong dispersive forces are provided by the adsorbent. The surface chemistry features responsible for the enhanced ammonia adsorption include the presence of oxygen-(carboxyl, hydroxyl, epoxy) and sulfur- (sulfonic) containing groups. Metallic species improve the breakthrough capacity as well as they lead to the formation of Lewis acid-base interactions, hydrogen-bonding or complexation. In addition to the latter three mechanisms, ammonia is retained on the adsorbent surface via Bronsted acid-base interactions or via specific reactions with the adsorbent's functionalities leading to the incorporation of ammonia into the adsorbent's matrix. Another mechanism involves dissolution of ammonia in water when moisture is present in the system. Even though this process increases the breakthrough capacity of a material, it provides rather weak retention forces since ammonia dissolved in water is easily desorbed from the adsorbent's surface.
590 $a School code: 0046.
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710 2 $a City University of New York. $b Chemistry. $3 1058373
773 0 $t Dissertation Abstracts International $g 72-05B.
790 1 0 $a Bandosz, Teresa J., $e advisor
790 1 0 $a Bandosz, Teresa J. $e committee member
790 1 0 $a Alexandratos, Spiro $e committee member
790 1 0 $a Couzis, Alexander $e committee member
790 $a 0046
791 $a Ph.D.
792 $a 2011
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