Investigation of guanidinium acetylacetonate and polyethylene glycol mixture as a new reversible and efficient SO₂ absorbent

Chunyao ZhengBiodiesel Laboratory of China Petroleum and Chemical Industry Federation, Zhejiang Province Key Laboratory of Biofuel, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, P. R. ChinaView further author information

Ke LiBiodiesel Laboratory of China Petroleum and Chemical Industry Federation, Zhejiang Province Key Laboratory of Biofuel, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, P. R. ChinaView further author information

Chao ZhangBiodiesel Laboratory of China Petroleum and Chemical Industry Federation, Zhejiang Province Key Laboratory of Biofuel, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, P. R. ChinaView further author information

Dongshun DengBiodiesel Laboratory of China Petroleum and Chemical Industry Federation, Zhejiang Province Key Laboratory of Biofuel, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, P. R. ChinaCorrespondence[email protected]

https://orcid.org/0000-0001-7125-1833 View further author information

ABSTRACT

Weak basic guanidinium acetylacetonate ([TMG][acac]) was synthesized and blended with PEG200 to construct hybrid absorbent for SO₂. The composition was optimized on the basis of viscosity and SO₂ absorption performance. For the preferred 20% [TMG][acac]-PEG200 mixture, the effect of various parameters were systematically investigated. Results showed that the maximum mass ratio of SO₂ to [TMG][acac] was 0.838 and 0.331 at 30°C for pure and 10% SO₂, respectively. The mixture was easily recycled five times. The present SO₂ capture process using [TMG][acac]-PEG200 mixtures was a promising method for SO₂ removal with both good reversibility and high absorption capacity.

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Funding

The research was supported by the Natural Science Foundation [21978263] and Zhejiang Provincial Natural Science Foundation of China under Grant No. [LY17B060010].

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Investigation of guanidinium acetylacetonate and polyethylene glycol mixture as a new reversible and efficient SO₂ absorbent