Adsorption of sulfur dioxide by active carbon treated by nitric acid: I. Effect of the treatment on adsorption of SO2 and extractability of the acid formed

A. Lisovskii; R. Semiat; C. Aharoni

doi:10.1016/S0008-6223(97)00129-2

Adsorption of sulfur dioxide by active carbon treated by nitric acid: I. Effect of the treatment on adsorption of SO₂ and extractability of the acid formed

A. Lisovskii, R. Semiat^*, C. Aharoni

^*Corresponding author for this work

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

124 Scopus citations

Abstract

The process of adsorptive-catalytic cleaning of gas from sulfur dioxide using active carbon, treated by concentrated nitric acid, was studied. After oxidative treatment the acidity of the carbon increases and the basicity decreases. This results in an increase of the SO₂ adsorption and its oxidation to SO₃, and in weaker retention of the sulfuric acid formed. This facilitates the removal of H₂SO₄ by washing of the carbon and allows to obtain a more concentrated acid. The efficiency of the treated carbon is also higher in the process of SO₂ removal from a gas similar in composition to stack gases.

Original language	English
Pages (from-to)	1639-1643
Number of pages	5
Journal	Carbon
Volume	35
Issue number	10-11
DOIs	https://doi.org/10.1016/S0008-6223(97)00129-2
State	Published - 1997
Externally published	Yes

Keywords

A. Activated carbon
C. Adsorption
D. Surface properties

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abstract = "The process of adsorptive-catalytic cleaning of gas from sulfur dioxide using active carbon, treated by concentrated nitric acid, was studied. After oxidative treatment the acidity of the carbon increases and the basicity decreases. This results in an increase of the SO2 adsorption and its oxidation to SO3, and in weaker retention of the sulfuric acid formed. This facilitates the removal of H2SO4 by washing of the carbon and allows to obtain a more concentrated acid. The efficiency of the treated carbon is also higher in the process of SO2 removal from a gas similar in composition to stack gases.",

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T2 - I. Effect of the treatment on adsorption of SO2 and extractability of the acid formed

AU - Lisovskii, A.

AU - Semiat, R.

AU - Aharoni, C.

PY - 1997

Y1 - 1997

N2 - The process of adsorptive-catalytic cleaning of gas from sulfur dioxide using active carbon, treated by concentrated nitric acid, was studied. After oxidative treatment the acidity of the carbon increases and the basicity decreases. This results in an increase of the SO2 adsorption and its oxidation to SO3, and in weaker retention of the sulfuric acid formed. This facilitates the removal of H2SO4 by washing of the carbon and allows to obtain a more concentrated acid. The efficiency of the treated carbon is also higher in the process of SO2 removal from a gas similar in composition to stack gases.

AB - The process of adsorptive-catalytic cleaning of gas from sulfur dioxide using active carbon, treated by concentrated nitric acid, was studied. After oxidative treatment the acidity of the carbon increases and the basicity decreases. This results in an increase of the SO2 adsorption and its oxidation to SO3, and in weaker retention of the sulfuric acid formed. This facilitates the removal of H2SO4 by washing of the carbon and allows to obtain a more concentrated acid. The efficiency of the treated carbon is also higher in the process of SO2 removal from a gas similar in composition to stack gases.

KW - A. Activated carbon

KW - C. Adsorption

KW - D. Surface properties

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