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This study focuses on the development of effective hydrophobic modified honeycomb-like tubular biochar (HT-B) with enhanced adsorption capacity under humid environment. HT-B was first synthesized from corn stalks (CS) and underwent surface modification through the impregnation of metal salt to produce CS/HT-B1M. It was further modified through hydrophobic coating using polydimethysiloxane (PDMS). Characterization studies and VOCs adsorption studies were conducted at relative humidities of 50, 70, and 90%. It was found that the coated CS/HT-B1M exhibits the highest adsorption capacity at coating ration of 1:25 with the modification temperature of 200 °C for an hour. As the relative humidity increases, the coated CS/HT-B1M shows reduction in the adsorption capacity of 28.7% compared to the uncoated form. The findings showed that PDMS coated CS/HT-B1M enhances the adsorption capabilities of biochar under humid conditions.

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Hydrophobic Honeycomb-Like Tubular Biochar Derived from Corn Stalks as a Potential Absorbent for VOCs Removal Under Humid Conditions

  • 会议论文

  • 发表日期：

    2025年

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  • Fanthagiro Rossi Stuart Majing,
  • Yen San Chan,
  • Yie Hua Tan,
  • Mohd Dinie Muhaimin Samsudin

摘要

This study focuses on the development of effective hydrophobic modified honeycomb-like tubular biochar (HT-B) with enhanced adsorption capacity under humid environment. HT-B was first synthesized from corn stalks (CS) and underwent surface modification through the impregnation of metal salt to produce CS/HT-B1M. It was further modified through hydrophobic coating using polydimethysiloxane (PDMS). Characterization studies and VOCs adsorption studies were conducted at relative humidities of 50, 70, and 90%. It was found that the coated CS/HT-B1M exhibits the highest adsorption capacity at coating ration of 1:25 with the modification temperature of 200 °C for an hour. As the relative humidity increases, the coated CS/HT-B1M shows reduction in the adsorption capacity of 28.7% compared to the uncoated form. The findings showed that PDMS coated CS/HT-B1M enhances the adsorption capabilities of biochar under humid conditions.