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.

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