Preparation and Characterization of Urea-Modified Lignin-Derived Porous Carbon Materials and their CO₂ Adsorption Properties

Abstract:

Present study, activated carbon was precarbonised and chemically activated to prepare activated charcoal from different lignins , and their adsorption properties had been investigated. The influences of carbon source selection with urea modification on the CO₂ adsorption performance of the materials were investigated. The selectivity, warmth of adsorption and cyclic steadiness of the materials had been in addition tested. The urea-modified porous carbon materials were prepared using dealkylated lignin (LCC), calcium lignosulfonate (CLS) and sodium lignosulfonate (SLS) as carbon precursors, KOH as activator and urea as nitrogen dopant. The CO₂ adsorption values of the LCC-0.5N samples had been 5.52 mmol/g and 3.90 mmol/g at 1 bar, 273 K and 298 K, respectively, and were obtained in 10 successive adsorption-desorption cycles. The CO₂ adsorption ability remained stable and greater than 110 mg/g after 10 consecutive adsorption-desorption cycles.

• Periodical: Materials Science Forum (Volume 1125)
• Pages: 95-106
• DOI: https://doi.org/10.4028/p-RErxr0
• Online since: September 2024
• Authors: Siriguleng Bao, Ling Zhen Gong, Bao Agula*
• Keywords: Lignin, Porous Carbon Materials, Urea

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