RECOVERY OF DISSOLVED LIGNOCELLULOSIC MATERIALS FROM THE PHL OF KRAFT-BASED DISSOLVING PULP PROCESS USING ACTIVATED CARBON
The lignocellulosic materials dissolved in the prehydrolysis liquor (PHL) of kraft-based dissolving pulp production process have great potential to be used in the production of various value-added products. However, their low concentrations in PHL impair their further utilization. In this work, the adsorption of these materials on activated carbon (AC) was investigated under various conditions. In one set of experiments, the oxidation of AC was followed via using H2O2 or H2SO4 to improve the adsorption efficiency. The modifications increased the adsorption of dissolved materials, especially that of hemicelluloses on AC. In another set of experiments, poly diallyldimethyl ammonium chloride (PDADMAC) or chitosan was adsorbed on the surface of AC, and the modified ACs was applied to adsorb lignocellulosic materials of the PHL. The results showed that the amount of PDADMAC or chitosan adsorbed on AC played an important role in the adsorption of lignocellulosic materials. If the ratio of lignocellulosic materials to AC was low in solutions, the polymer-modified AC had a higher adsorption than the unmodified AC for lignocellulosic materials. However, if the ratio was high, the adsorption of lignocellulosic materials was independent of the polymer modification.
adsorption activated carbon biorefinery pre-hydrolysis liquor hemicelluloses lignin
Xin Liu Pedram Fatehi Yonghao Ni
Department of Chemical Engineering and Limerick Pulp and Paper Centre,University of New Brunswick, Department of Chemical Engineering and Limerick Pulp and Paper Centre, University of New Brunswic
国际会议
16th International Symposium on Wood,Fiber and Pulping Chemistry(第十六届木材、纤维及制浆化学国际会议)
天津
英文
849-854
2011-06-08（万方平台首次上网日期，不代表论文的发表时间）