Next Article in Journal
Chemically Modified Polyvinyl Chloride for Removal of Thionine Dye (Lauth’s Violet)
Next Article in Special Issue
Contact Behavior of Composite CrTiSiN Coated Dies in Compressing of Mg Alloy Sheets under High Pressure
Previous Article in Journal
Reduced Graphene Oxide on Nickel Foam for Supercapacitor Electrodes
Previous Article in Special Issue
Effect of Wafer Level Underfill on the Microbump Reliability of Ultrathin-Chip Stacking Type 3D-IC Assembly during Thermal Cycling Tests
Article Menu
Issue 11 (November) cover image

Export Article

Open AccessArticle
Materials 2017, 10(11), 1296; doi:10.3390/ma10111296

Effect of Relative Humidity on Adsorption Breakthrough of CO2 on Activated Carbon Fibers

1
Department of Mechanical Engineering, Yuan Ze University, Taoyuan 32003, Taiwan
2
Fuel Cell Center, Yuan Ze University, Taoyuan 32003, Taiwan
*
Author to whom correspondence should be addressed.
Received: 1 September 2017 / Revised: 5 November 2017 / Accepted: 9 November 2017 / Published: 11 November 2017
(This article belongs to the Special Issue Selected Papers from IMETI2016)
View Full-Text   |   Download PDF [4001 KB, uploaded 11 November 2017]   |  

Abstract

Microporous activated carbon fibers (ACFs) were developed for CO2 capture based on potassium hydroxide (KOH) activation and tetraethylenepentamine (TEPA) amination. The material properties of the modified ACFs were characterized using several techniques. The adsorption breakthrough curves of CO2 were measured and the effect of relative humidity in the carrier gas was determined. The KOH activation at high temperature generated additional pore networks and the intercalation of metallic K into the carbon matrix, leading to the production of mesopore and micropore volumes and providing access to the active sites in the micropores. However, this treatment also resulted in the loss of nitrogen functionalities. The TEPA amination has successfully introduced nitrogen functionalities onto the fiber surface, but its long-chain structure blocked parts of the micropores and, thus, made the available surface area and pore volume limited. Introduction of the power of time into the Wheeler equation was required to fit the data well. The relative humidity within the studied range had almost no effects on the breakthrough curves. It was expected that the concentration of CO2 was high enough so that the impact on CO2 adsorption capacity lessened due to increased relative humidity. View Full-Text
Keywords: relative humidity; carbon dioxide; activated carbon fibers; surface modification; adsorption breakthrough relative humidity; carbon dioxide; activated carbon fibers; surface modification; adsorption breakthrough
Figures

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Share & Cite This Article

MDPI and ACS Style

Chiang, Y.-C.; Chen, Y.-J.; Wu, C.-Y. Effect of Relative Humidity on Adsorption Breakthrough of CO2 on Activated Carbon Fibers. Materials 2017, 10, 1296.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Materials EISSN 1996-1944 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top