Use of ionic liquids as absorbents to separate so2 in so 2/O2 in thermochemical processes to produce hydrogen

Ki Yong Lee; Gyeong Taek Gong; Kwang Ho Song; Honggon Kim; Kwang Deog Jimg; Chang Soo Kim

doi:10.1016/j.ijhydene.2008.08.002

Use of ionic liquids as absorbents to separate so₂ in so ₂/O₂ in thermochemical processes to produce hydrogen

Ki Yong Lee, Gyeong Taek Gong, Kwang Ho Song, Honggon Kim, Kwang Deog Jimg, Chang Soo Kim

Department of Chemical and Biological Engineering

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

36 Citations (Scopus)

Abstract

In the thermochemical cycles such as the SI (sulfur-iodine) cycle, the Westinghouse process, and Ispra Mark 13 process, SO₂ needs to be separated and purified to enhance system efficiency. As novel absorbents with non-volatility, thermal stability and high SO₂ absorption capability, the characteristics of ionic liquids (ILs) as SO₂ absorbents were investigated to separate SO₂ in SO₂/O₂ gaseous mixtures from the sulfuric acid decomposer. SO₂ absorption and desorption experiments showed that SO₂ solubility and absorption rate in ILs were influenced mainly by anions of ILs. [BMIm][Cl] and [BMIm][OAc] (1.40-1.69 SO₂ gmol/ILs gmol) showed the highest SO₂ solubility among the tested ILs at 50°C and 0.67 atm P_so2. Interestingly, [BMIm][OAc] showed irreversibility in the cycle of absorption and desorption. [BMIm][MeSO₄] showed moderate SO₂ solubility and good reversible cycles of absorption and desorption. The dependency of temperature and pressure on SO₂ solubility of [BMIm][MeSO ₄] was scrutinized.

Original language	English
Pages (from-to)	6031-6036
Number of pages	6
Journal	International Journal of Hydrogen Energy
Volume	33
Issue number	21
DOIs	https://doi.org/10.1016/j.ijhydene.2008.08.002
Publication status	Published - 2008 Nov

Keywords

Cycle
Ionic liquid
Sulfur dioxide absorbent
Sulfur dioxide separation
Thermochemical water splitting

ASJC Scopus subject areas

Renewable Energy, Sustainability and the Environment
Fuel Technology
Condensed Matter Physics
Energy Engineering and Power Technology

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1016/j.ijhydene.2008.08.002

Cite this

@article{f3cfcfbb374a497dbe5ff33acd38733e,

title = "Use of ionic liquids as absorbents to separate so2 in so 2/O2 in thermochemical processes to produce hydrogen",

abstract = "In the thermochemical cycles such as the SI (sulfur-iodine) cycle, the Westinghouse process, and Ispra Mark 13 process, SO2 needs to be separated and purified to enhance system efficiency. As novel absorbents with non-volatility, thermal stability and high SO2 absorption capability, the characteristics of ionic liquids (ILs) as SO2 absorbents were investigated to separate SO2 in SO2/O2 gaseous mixtures from the sulfuric acid decomposer. SO2 absorption and desorption experiments showed that SO2 solubility and absorption rate in ILs were influenced mainly by anions of ILs. [BMIm][Cl] and [BMIm][OAc] (1.40-1.69 SO2 gmol/ILs gmol) showed the highest SO2 solubility among the tested ILs at 50°C and 0.67 atm Pso2. Interestingly, [BMIm][OAc] showed irreversibility in the cycle of absorption and desorption. [BMIm][MeSO4] showed moderate SO2 solubility and good reversible cycles of absorption and desorption. The dependency of temperature and pressure on SO2 solubility of [BMIm][MeSO 4] was scrutinized.",

keywords = "Cycle, Ionic liquid, Sulfur dioxide absorbent, Sulfur dioxide separation, Thermochemical water splitting",

author = "Lee, {Ki Yong} and Gong, {Gyeong Taek} and Song, {Kwang Ho} and Honggon Kim and Jimg, {Kwang Deog} and Kim, {Chang Soo}",

note = "Funding Information: The authors wish to thank the financial support from MOST of Korea and KAERI. This work has been carried out under the Nuclear Hydrogen Development and Demonstration Project (NHDD).",

year = "2008",

month = nov,

doi = "10.1016/j.ijhydene.2008.08.002",

language = "English",

volume = "33",

pages = "6031--6036",

journal = "International Journal of Hydrogen Energy",

issn = "0360-3199",

publisher = "Elsevier Limited",

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}

TY - JOUR

T1 - Use of ionic liquids as absorbents to separate so2 in so 2/O2 in thermochemical processes to produce hydrogen

AU - Lee, Ki Yong

AU - Gong, Gyeong Taek

AU - Song, Kwang Ho

AU - Kim, Honggon

AU - Jimg, Kwang Deog

AU - Kim, Chang Soo

N1 - Funding Information: The authors wish to thank the financial support from MOST of Korea and KAERI. This work has been carried out under the Nuclear Hydrogen Development and Demonstration Project (NHDD).

PY - 2008/11

Y1 - 2008/11

N2 - In the thermochemical cycles such as the SI (sulfur-iodine) cycle, the Westinghouse process, and Ispra Mark 13 process, SO2 needs to be separated and purified to enhance system efficiency. As novel absorbents with non-volatility, thermal stability and high SO2 absorption capability, the characteristics of ionic liquids (ILs) as SO2 absorbents were investigated to separate SO2 in SO2/O2 gaseous mixtures from the sulfuric acid decomposer. SO2 absorption and desorption experiments showed that SO2 solubility and absorption rate in ILs were influenced mainly by anions of ILs. [BMIm][Cl] and [BMIm][OAc] (1.40-1.69 SO2 gmol/ILs gmol) showed the highest SO2 solubility among the tested ILs at 50°C and 0.67 atm Pso2. Interestingly, [BMIm][OAc] showed irreversibility in the cycle of absorption and desorption. [BMIm][MeSO4] showed moderate SO2 solubility and good reversible cycles of absorption and desorption. The dependency of temperature and pressure on SO2 solubility of [BMIm][MeSO 4] was scrutinized.

AB - In the thermochemical cycles such as the SI (sulfur-iodine) cycle, the Westinghouse process, and Ispra Mark 13 process, SO2 needs to be separated and purified to enhance system efficiency. As novel absorbents with non-volatility, thermal stability and high SO2 absorption capability, the characteristics of ionic liquids (ILs) as SO2 absorbents were investigated to separate SO2 in SO2/O2 gaseous mixtures from the sulfuric acid decomposer. SO2 absorption and desorption experiments showed that SO2 solubility and absorption rate in ILs were influenced mainly by anions of ILs. [BMIm][Cl] and [BMIm][OAc] (1.40-1.69 SO2 gmol/ILs gmol) showed the highest SO2 solubility among the tested ILs at 50°C and 0.67 atm Pso2. Interestingly, [BMIm][OAc] showed irreversibility in the cycle of absorption and desorption. [BMIm][MeSO4] showed moderate SO2 solubility and good reversible cycles of absorption and desorption. The dependency of temperature and pressure on SO2 solubility of [BMIm][MeSO 4] was scrutinized.

KW - Cycle

KW - Ionic liquid

KW - Sulfur dioxide absorbent

KW - Sulfur dioxide separation

KW - Thermochemical water splitting

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