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Densification of Biochars with Binders for Gas-Phase Adsorption Applications.

Record Type:	Language materials, manuscript : Monograph/item
Title/Author:	Densification of Biochars with Binders for Gas-Phase Adsorption Applications./
Author:	Koranten-Amoako, Jacob Owurahene.
Description:	1 online resource (66 pages)
Notes:	Source: Masters Abstracts International, Volume: 84-03.
Contained By:	Masters Abstracts International84-03.
Subject:	Chemical engineering. -
Online resource:	click for full text (PQDT)
ISBN:	9798845419576

Densification of Biochars with Binders for Gas-Phase Adsorption Applications.
Koranten-Amoako, Jacob Owurahene.

Densification of Biochars with Binders for Gas-Phase Adsorption Applications. - 1 online resource (66 pages)

Source: Masters Abstracts International, Volume: 84-03.

Thesis (M.S.Ch.E.)--New Mexico State University, 2022.

Includes bibliographical references

Biochar is a multifunctional material due to its surface chemistry, surface area and porosity. Substituting activated carbon with biochar can alleviate the cost of activation and regeneration. Agricultural and industrial woody wastes are viable feedstock options for the production of biochar. Feedstock plays a role in the utility of the biochar because of the surface chemistry found in the feedstocks. Activated carbon outperforms biochar in gas adsorption processes due to the improved porosity and modified surface chemistry after activation; improving biochar's physical properties through other processes than activation could remedy this. One potential method to improve the physical properties of biochar is pelletization. This project evaluated the effect of densification through pelletization of biochar. Biochars made from rice husks, pecan shells and pine wood were pelletized and analyzed to determine the changes in the physical properties. Gas sorption analysis with carbon dioxide (CO2) and nitrogen (N2) was used to determine the change in surface area and pore volume after biochar was pelletized. Changes in Braunauer-Emmet-Teller (BET) surface area were observed when the analysis gas was N2 but not when gas sorption analysis gas was CO2. Addition of lignin reduced the BET surface area in rice husk biochar pellets from 5.6 m2/g to 0.7 m2/g. This reduction of surface area reduces the applicability of the biochar pellets for physisorption. Evaluation of the pellets and the biochar showed there was no loss in the surface functional groups with pelletization. The addition of the alkali lignin as a binder adds the surface functional groups found in lignin (and lost during pyrolysis) to the biochar pellets. Specifically, the -OH group found in alkali lignin improves the surface functionality for chemisorption. Pine wood biochar had a lower adsorption capacity (458 mg/g) compared to rice husk biochar (> 4182 mg/g) and activated carbon (> 1676 mg/g) for hydrogen sulfide. Effects of densification on the biochar adsorption performance could not be evaluated due to the limited amount of available hydrogen sulfide column adsorption data.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2024

Mode of access: World Wide Web

ISBN: 9798845419576Subjects--Topical Terms:

555952
Chemical engineering.
Subjects--Index Terms:

BiocharIndex Terms--Genre/Form:

554714
Electronic books.

Densification of Biochars with Binders for Gas-Phase Adsorption Applications.
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