Oxidative modifications of rice hull-based carbons for dibenzothiophene adsorptive removal

G. X. Yu; M. Jin; J. Sun; X. L. Zhou; L. F. Chen; J. A. Wang

doi:10.1016/j.cattod.2012.09.020

Oxidative modifications of rice hull-based carbons for dibenzothiophene adsorptive removal

G. X. Yu, M. Jin, J. Sun, X. L. Zhou, L. F. Chen, J. A. Wang

Research output: Contribution to journal › Article › peer-review

32 Scopus citations

Abstract

Four oxidative modifications using concentrated nitric acid, concentrated sulfuric acid, peracetic acid, and hot air, were employed to treat the rice hull (RH) activated by KOH at 750 C, which produced four RH-based carbon materials with different surface chemical properties. The textural structures, surface chemical properties and surface topography were respectively characterized by N₂ adsorption, Boehm titration, Fourier transmission infrared (FT-IR) and scanning electron microscopy (SEM) techniques. Oxidative modifications resulted in changes of both the textural structures and the surface chemistry properties. Experimental results showed that the DBT adsorption behavior of RH-based carbon adsorbents fitted well the Langmuir isotherm equation. The DBT adsorption capacity was strongly influenced by the oxygen containing acid groups on the samples, and an excellent correlation between DBT adsorption capacity and the amount of the strong acid groups was observed, indicating that the amount of the strong acidic groups on RH-based carbons play the most important role in DBT adsorption. It was postulated that the formation of donor-acceptor complexes between the adsorbent and the adsorbate was largely responsible for the significant improvement of the DBT adsorption after oxidative modifications.

Original language	English
Pages (from-to)	31-37
Number of pages	7
Journal	Catalysis Today
Volume	212
DOIs	https://doi.org/10.1016/j.cattod.2012.09.020
State	Published - 1 Sep 2013
Externally published	Yes

Keywords

Adsorptive desulfurization
Carbon surface chemistry
KOH-activation
Oxidative modification
Rice hull

Access to Document

10.1016/j.cattod.2012.09.020

Cite this

@article{9eb1b94cd9ea4236b77efaea23684901,

title = "Oxidative modifications of rice hull-based carbons for dibenzothiophene adsorptive removal",

abstract = "Four oxidative modifications using concentrated nitric acid, concentrated sulfuric acid, peracetic acid, and hot air, were employed to treat the rice hull (RH) activated by KOH at 750 C, which produced four RH-based carbon materials with different surface chemical properties. The textural structures, surface chemical properties and surface topography were respectively characterized by N2 adsorption, Boehm titration, Fourier transmission infrared (FT-IR) and scanning electron microscopy (SEM) techniques. Oxidative modifications resulted in changes of both the textural structures and the surface chemistry properties. Experimental results showed that the DBT adsorption behavior of RH-based carbon adsorbents fitted well the Langmuir isotherm equation. The DBT adsorption capacity was strongly influenced by the oxygen containing acid groups on the samples, and an excellent correlation between DBT adsorption capacity and the amount of the strong acid groups was observed, indicating that the amount of the strong acidic groups on RH-based carbons play the most important role in DBT adsorption. It was postulated that the formation of donor-acceptor complexes between the adsorbent and the adsorbate was largely responsible for the significant improvement of the DBT adsorption after oxidative modifications.",

keywords = "Adsorptive desulfurization, Carbon surface chemistry, KOH-activation, Oxidative modification, Rice hull",

author = "Yu, {G. X.} and M. Jin and J. Sun and Zhou, {X. L.} and Chen, {L. F.} and Wang, {J. A.}",

note = "Funding Information: The authors thank the financial support from project of Instituto Polit{\'e}cnico Nacional, Mexico (Grant No. SIP-20120229 ).",

year = "2013",

month = sep,

day = "1",

doi = "10.1016/j.cattod.2012.09.020",

language = "Ingl{\'e}s",

volume = "212",

pages = "31--37",

journal = "Catalysis Today",

issn = "0920-5861",

}

TY - JOUR

T1 - Oxidative modifications of rice hull-based carbons for dibenzothiophene adsorptive removal

AU - Yu, G. X.

AU - Jin, M.

AU - Sun, J.

AU - Zhou, X. L.

AU - Chen, L. F.

AU - Wang, J. A.

N1 - Funding Information: The authors thank the financial support from project of Instituto Politécnico Nacional, Mexico (Grant No. SIP-20120229 ).

PY - 2013/9/1

Y1 - 2013/9/1

N2 - Four oxidative modifications using concentrated nitric acid, concentrated sulfuric acid, peracetic acid, and hot air, were employed to treat the rice hull (RH) activated by KOH at 750 C, which produced four RH-based carbon materials with different surface chemical properties. The textural structures, surface chemical properties and surface topography were respectively characterized by N2 adsorption, Boehm titration, Fourier transmission infrared (FT-IR) and scanning electron microscopy (SEM) techniques. Oxidative modifications resulted in changes of both the textural structures and the surface chemistry properties. Experimental results showed that the DBT adsorption behavior of RH-based carbon adsorbents fitted well the Langmuir isotherm equation. The DBT adsorption capacity was strongly influenced by the oxygen containing acid groups on the samples, and an excellent correlation between DBT adsorption capacity and the amount of the strong acid groups was observed, indicating that the amount of the strong acidic groups on RH-based carbons play the most important role in DBT adsorption. It was postulated that the formation of donor-acceptor complexes between the adsorbent and the adsorbate was largely responsible for the significant improvement of the DBT adsorption after oxidative modifications.

AB - Four oxidative modifications using concentrated nitric acid, concentrated sulfuric acid, peracetic acid, and hot air, were employed to treat the rice hull (RH) activated by KOH at 750 C, which produced four RH-based carbon materials with different surface chemical properties. The textural structures, surface chemical properties and surface topography were respectively characterized by N2 adsorption, Boehm titration, Fourier transmission infrared (FT-IR) and scanning electron microscopy (SEM) techniques. Oxidative modifications resulted in changes of both the textural structures and the surface chemistry properties. Experimental results showed that the DBT adsorption behavior of RH-based carbon adsorbents fitted well the Langmuir isotherm equation. The DBT adsorption capacity was strongly influenced by the oxygen containing acid groups on the samples, and an excellent correlation between DBT adsorption capacity and the amount of the strong acid groups was observed, indicating that the amount of the strong acidic groups on RH-based carbons play the most important role in DBT adsorption. It was postulated that the formation of donor-acceptor complexes between the adsorbent and the adsorbate was largely responsible for the significant improvement of the DBT adsorption after oxidative modifications.

KW - Adsorptive desulfurization

KW - Carbon surface chemistry

KW - KOH-activation

KW - Oxidative modification

KW - Rice hull

UR - http://www.scopus.com/inward/record.url?scp=84879969690&partnerID=8YFLogxK

U2 - 10.1016/j.cattod.2012.09.020

DO - 10.1016/j.cattod.2012.09.020

M3 - Artículo

AN - SCOPUS:84879969690

SN - 0920-5861

VL - 212

SP - 31

EP - 37

JO - Catalysis Today

JF - Catalysis Today

ER -

Oxidative modifications of rice hull-based carbons for dibenzothiophene adsorptive removal

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this