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Open AccessArticle

Preparation of Nano-Porous Carbon-Silica Composites and Its Adsorption Capacity to Volatile Organic Compounds

by Lipei Fu 1,2, Jiahui Zhu 1,2, Weiqiu Huang 1,2,*, Jie Fang 1,2, Xianhang Sun 1,2, Xinya Wang 1,2 and Kaili Liao 1,2,*
1
School of Petroleum Engineering, Changzhou University, Changzhou 213164, China
2
Jiangsu Key Laboratory of Oil & Gas Storage and Transportation Technology, Changzhou University, Changzhou 213164, China
*
Authors to whom correspondence should be addressed.
Processes 2020, 8(3), 372; https://doi.org/10.3390/pr8030372
Received: 21 February 2020 / Revised: 3 March 2020 / Accepted: 5 March 2020 / Published: 23 March 2020
(This article belongs to the Special Issue Advances in Nanomaterials for Selective Adsorption)
Carbon-silica composites with nanoporous structures were synthesized for the adsorption of volatile organic compounds (VOCs), taking tetraethyl orthosilicate (TEOS) as the silicon source and activated carbon powder as the carbon source. The preparation conditions were as follows: the pH of the reaction system was 5.5, the hydrophobic modification time was 50 h, and the dosage of activated carbon was 2 wt%. Infrared spectrum analysis showed that the activated carbon was dispersed in the pores of aerogel to form the carbon-silica composites material. The static adsorption experiments, dynamic adsorption-desorption experiments, and regeneration experiments show that the prepared carbon-silica composites have microporous and mesoporous structures, the adsorption capacity for n-hexane is better than that of conventional hydrophobic silica gel, and the desorption performance is better than that of activated carbon. It still has a high retention rate of adsorption capacity after multiple adsorption-desorption cycles. The prepared carbon-silica composites material has good industrial application prospects in oil vapor recovery, providing a new alternative for solving organic waste gas pollution. View Full-Text
Keywords: volatile organic compounds (VOCs); adsorption; carbon-silica composites; regenerating property; dynamic adsorption volatile organic compounds (VOCs); adsorption; carbon-silica composites; regenerating property; dynamic adsorption
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MDPI and ACS Style

Fu, L.; Zhu, J.; Huang, W.; Fang, J.; Sun, X.; Wang, X.; Liao, K. Preparation of Nano-Porous Carbon-Silica Composites and Its Adsorption Capacity to Volatile Organic Compounds. Processes 2020, 8, 372.

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