ADSORPTION OF LIGNOCELLULOSIC MATERIALS DISSOLVED IN PRE-HYDROLYSIS LIQUOR OF KRAFT-BASED DISSOLVING PULP PRODUCTION PROCESS ON POLYMER-MODIFIED ACTIVATED CARBONS

作者：Liu Xin^*; Fatehi Pedram; Ni Yonghao

来源：J-FOR-Journal of Science & Technology for Forest Products and Processes, 2011, 1(1): 46-54.

The extraction of hemicelluloses from wood chips is crucial for producing value-added biomaterials in a forest biorefinery utilization. The low concentration of dissolved lignocellulosic materials dissolved in pre-hydrolysis liquor (PHL) presents a big challenge to the overall utilization processes. In this work, activated carbon (AC) was first modified with polydiallyldimethylammonium (P-DADMAC) chloride or chitosan, and then the modified AC was applied for adsorbing lignocellulosic materials from the PHL. The results showed that the amount of P-DADMAC or chitosan adsorbed on the AC played an important role in the adsorption of lignocellulosic materials. If the mass ratio of PHL to AC was low (20/1 or 40/1) in solutions, the polymer-modified AC had a higher adsorption than the unmodified AC for lignocellulosic materials. However, if the weight ratio was high (140/1), the adsorption of lignocellulosic materials was independent of the modification. Additionally, the P-DADMAC or chitosan modification had a negative effect on the adsorption rate of lignocellulosic materials on AC.

• 出版日期2011