Enhancement of surface properties of oil fly ash by chemical treatment

Reyad Shawabkeh; Muhammad J. Khan; Abdulhadi A. Al-Juhani; Hamad I. Al-Abdul Wahhab; Ibnelwaleed A. Hussein

doi:10.1016/j.apsusc.2011.07.136

Enhancement of surface properties of oil fly ash by chemical treatment

Reyad Shawabkeh
, Muhammad J. Khan
, Abdulhadi A. Al-Juhani
, Hamad I. Al-Abdul Wahhab
, Ibnelwaleed A. Hussein^*

^*Corresponding author for this work

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

32 Scopus citations

Abstract

In this study, surface modification of oil fly ash (OFA), a by-product generated by oil power plants, was achieved by chemical treatment. A mixture of sulfuric and nitric acids was used to modify the surface in order to attach a carboxylic functional group to the surface of OFA. The goal of surface modification of OFA is to make its surface more compatible with nonpolar polymers in order to produce OFA/polymer composite materials with improved dispersion of OFA, and to increase OFA surface area in order to support its use as adsorbent materials in adsorptive separation and purification applications. Different acid compositions were used for treatment by gradually increasing the nitric acid concentration from 0 to 20%. Also, the effect of oxidation on surface modification was examined by introducing air to enhance the oxidation of OFA. FTIR analysis was performed to identify the different functional groups attached to OFA surface before and after the chemical treatment. Evaluation of different structural changes during the surface modification was investigated by XRD analysis. Surface morphology and spot analysis was studied by SEM technique to identify the composition of different elements present in the OFA such as carbon, oxygen and sulfur. BET analysis showed major increase in surface area after modification as well as pore size and micropore volume of OFA particles. The maximum increase in surface area was obtained with 15 vol.% HNO ₃ . Also, carboxylic functionalization of OFA was enhanced when air was injected.

Original language	English
Pages (from-to)	1643-1650
Number of pages	8
Journal	Applied Surface Science
Volume	258
Issue number	5
DOIs	https://doi.org/10.1016/j.apsusc.2011.07.136
State	Published - 15 Dec 2011

Bibliographical note

Funding Information:
The authors would like to thank King Abdul Aziz City for Science and Technology (KACST) for supporting this research through project # AT-29-101. Also, the support of King Fahd University of Petroleum & Minerals (KFUPM) is acknowledged.

Keywords

Acid treatment
Ash
Oxidation
Surface modification

ASJC Scopus subject areas

General Chemistry
Condensed Matter Physics
General Physics and Astronomy
Surfaces and Interfaces
Surfaces, Coatings and Films

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10.1016/j.apsusc.2011.07.136

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title = "Enhancement of surface properties of oil fly ash by chemical treatment",

abstract = " In this study, surface modification of oil fly ash (OFA), a by-product generated by oil power plants, was achieved by chemical treatment. A mixture of sulfuric and nitric acids was used to modify the surface in order to attach a carboxylic functional group to the surface of OFA. The goal of surface modification of OFA is to make its surface more compatible with nonpolar polymers in order to produce OFA/polymer composite materials with improved dispersion of OFA, and to increase OFA surface area in order to support its use as adsorbent materials in adsorptive separation and purification applications. Different acid compositions were used for treatment by gradually increasing the nitric acid concentration from 0 to 20\%. Also, the effect of oxidation on surface modification was examined by introducing air to enhance the oxidation of OFA. FTIR analysis was performed to identify the different functional groups attached to OFA surface before and after the chemical treatment. Evaluation of different structural changes during the surface modification was investigated by XRD analysis. Surface morphology and spot analysis was studied by SEM technique to identify the composition of different elements present in the OFA such as carbon, oxygen and sulfur. BET analysis showed major increase in surface area after modification as well as pore size and micropore volume of OFA particles. The maximum increase in surface area was obtained with 15 vol.\% HNO 3 . Also, carboxylic functionalization of OFA was enhanced when air was injected.",

keywords = "Acid treatment, Ash, Oxidation, Surface modification",

author = "Reyad Shawabkeh and Khan, \{Muhammad J.\} and Al-Juhani, \{Abdulhadi A.\} and \{Al-Abdul Wahhab\}, \{Hamad I.\} and Hussein, \{Ibnelwaleed A.\}",

note = "Funding Information: The authors would like to thank King Abdul Aziz City for Science and Technology (KACST) for supporting this research through project \# AT-29-101. Also, the support of King Fahd University of Petroleum \& Minerals (KFUPM) is acknowledged.",

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doi = "10.1016/j.apsusc.2011.07.136",

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AU - Shawabkeh, Reyad

AU - Khan, Muhammad J.

AU - Al-Juhani, Abdulhadi A.

AU - Al-Abdul Wahhab, Hamad I.

AU - Hussein, Ibnelwaleed A.

N1 - Funding Information: The authors would like to thank King Abdul Aziz City for Science and Technology (KACST) for supporting this research through project # AT-29-101. Also, the support of King Fahd University of Petroleum & Minerals (KFUPM) is acknowledged.

PY - 2011/12/15

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N2 - In this study, surface modification of oil fly ash (OFA), a by-product generated by oil power plants, was achieved by chemical treatment. A mixture of sulfuric and nitric acids was used to modify the surface in order to attach a carboxylic functional group to the surface of OFA. The goal of surface modification of OFA is to make its surface more compatible with nonpolar polymers in order to produce OFA/polymer composite materials with improved dispersion of OFA, and to increase OFA surface area in order to support its use as adsorbent materials in adsorptive separation and purification applications. Different acid compositions were used for treatment by gradually increasing the nitric acid concentration from 0 to 20%. Also, the effect of oxidation on surface modification was examined by introducing air to enhance the oxidation of OFA. FTIR analysis was performed to identify the different functional groups attached to OFA surface before and after the chemical treatment. Evaluation of different structural changes during the surface modification was investigated by XRD analysis. Surface morphology and spot analysis was studied by SEM technique to identify the composition of different elements present in the OFA such as carbon, oxygen and sulfur. BET analysis showed major increase in surface area after modification as well as pore size and micropore volume of OFA particles. The maximum increase in surface area was obtained with 15 vol.% HNO 3 . Also, carboxylic functionalization of OFA was enhanced when air was injected.

AB - In this study, surface modification of oil fly ash (OFA), a by-product generated by oil power plants, was achieved by chemical treatment. A mixture of sulfuric and nitric acids was used to modify the surface in order to attach a carboxylic functional group to the surface of OFA. The goal of surface modification of OFA is to make its surface more compatible with nonpolar polymers in order to produce OFA/polymer composite materials with improved dispersion of OFA, and to increase OFA surface area in order to support its use as adsorbent materials in adsorptive separation and purification applications. Different acid compositions were used for treatment by gradually increasing the nitric acid concentration from 0 to 20%. Also, the effect of oxidation on surface modification was examined by introducing air to enhance the oxidation of OFA. FTIR analysis was performed to identify the different functional groups attached to OFA surface before and after the chemical treatment. Evaluation of different structural changes during the surface modification was investigated by XRD analysis. Surface morphology and spot analysis was studied by SEM technique to identify the composition of different elements present in the OFA such as carbon, oxygen and sulfur. BET analysis showed major increase in surface area after modification as well as pore size and micropore volume of OFA particles. The maximum increase in surface area was obtained with 15 vol.% HNO 3 . Also, carboxylic functionalization of OFA was enhanced when air was injected.

KW - Acid treatment

KW - Ash

KW - Oxidation

KW - Surface modification

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JO - Applied Surface Science

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IS - 5

ER -

Enhancement of surface properties of oil fly ash by chemical treatment

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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