Preparation of mesoporous activated carbon from Kraft lignin by impregnation with H2SO4: A four parameters optimization study. Issue 4 (31st October 2012)

• Record Type: Journal Article
• Authors: Li, Xianfa; Luo, Xuegang
• Is Part Of: Environmental progress & sustainable energy. Volume 32:Issue 4(2013:Dec.)
• Page Start: 1158
• Page End: 1163
• Publication Date: 2012-10-31
• Subjects: Environmental engineering -- Periodicals; Sustainable engineering -- Periodicals; Environmental chemistry -- Periodicals; 333.7
• DOI: 10.1002/ep.11716
• Languages: English
• ISSNs: 1944-7442

Abstract

<abstract abstract-type="main"> <title> <x xml:space="preserve">Abstract</x> </title> <p>Activated carbons (ACs) were prepared from waste Kraft lignin (KL) obtained from pulp and paper industry by chemical activation with H₂SO₄. The KL was characterized by elemental analysis and thermal gravimetric analysis. The suitable process conditions were optimized by an orthogonal design test [L₉ (3⁴)], factors including the activation temperature, concentration of H₂SO₄, activation time, and N₂ flow rate. The morphology and pore structure of ACs were investigated by means of scanning electron microscopy, cryogenic N₂ adsorption isotherm. The orthogonal test results suggested that the optimal activation parameters were as follows: 600°C of activation temperature, 35% of H₂SO₄ concentration, 120 min of activation time, and 100 cm³/min of N₂ flow rate. Under the selected conditions, a mesoporous ACs with BET surface area of 873.9 m²/g and total pore volume of 0.485 cm³/g was obtained. The ACs obtained from KL by H₂SO₄ activation were also compared with ACs prepared by H₃PO₄ and KOH activation. © 2012 American Institute of Chemical Engineers Environ Prog, 32: 1158–1163, 2013</p> </abstract>