Sulfur dioxide removal by sol-gel sorbent derived CuO/Alumina sorbents in fixed bed adsorber

Zhong-Min Wang; Zhong-Min Wang

doi:10.3934/environsci.2017.1.134

AIMS Environmental Science

2017, Volume 4, Issue 1: 134-144. doi: 10.3934/environsci.2017.1.134

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Sulfur dioxide removal by sol-gel sorbent derived CuO/Alumina sorbents in fixed bed adsorber

Zhong-Min Wang ^,

Department of Environmental Science and Engineering, University of Cincinnati, USA

Received: 05 December 2016 Accepted: 18 January 2017 Published: 10 February 2017

Nanostructured alumina supported copper oxide granular sorbents were prepared by the sol-gel method. The properties of the sol-gel derived sorbents were compared with a similar commercial sorbent which has been used in the pilot scale moving-bed copper oxide process for flue gas treatment. The crushing strength of the sol-gel derived sorbents is about 6–7 times that of the commercial samples, while the attrition rate of the former is at least 3 times smaller. At temperatures below 400 °C, SO₂sorption capacity of the sol-gel derived sorbent is about 3 times that of the commercial sorbent with a similar amount of CuO loading (7–9 wt%). The better mechanical properties and higher sulfation capacity of the sol-gel derived alumina supported copper oxide sorbents are due to their unique microstructure and the coating method for CuO.
- sulfur dioxide,
- sol-gel,
- fixed bed,
- nanostructured materials,
- air pollution control
Citation: Zhong-Min Wang. Sulfur dioxide removal by sol-gel sorbent derived CuO/Alumina sorbents in fixed bed adsorber[J]. AIMS Environmental Science, 2017, 4(1): 134-144. doi: 10.3934/environsci.2017.1.134

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Abstract

Nanostructured alumina supported copper oxide granular sorbents were prepared by the sol-gel method. The properties of the sol-gel derived sorbents were compared with a similar commercial sorbent which has been used in the pilot scale moving-bed copper oxide process for flue gas treatment. The crushing strength of the sol-gel derived sorbents is about 6–7 times that of the commercial samples, while the attrition rate of the former is at least 3 times smaller. At temperatures below 400 °C, SO₂sorption capacity of the sol-gel derived sorbent is about 3 times that of the commercial sorbent with a similar amount of CuO loading (7–9 wt%). The better mechanical properties and higher sulfation capacity of the sol-gel derived alumina supported copper oxide sorbents are due to their unique microstructure and the coating method for CuO.

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