title: Improving the adsorption of lignocelluloses of prehydrolysis liquor on precipitated calcium carbonate.
abstract: In this work, the adsorption of lignocelluloses of pre-hydrolysis liquor (PHL) on precipitated calcium carbonate (PCC) was studied in the presence of poly diallyldimethylammonium chloride (PDADMAC) or cationic polyacrylamide (CPAM). The results revealed that adding PCC to PHL and subsequently adding cationic polymers to PHL/PCC systems was more effective than adding cationic polymers to PHL and then adding PCC to the cationic polymer/PHL systems. At the same dosage applied, PDADMAC resulted in a higher adsorption of lignocelluloses on PCC than CPAM did due to its higher charge density. The adsorption of lignocelluloses on PCC reached its maximum in 3h, and a high temperature reduced the adsorption level as the adsorption was an exothermic process. The maximum adsorptions of 530 mg/g oligo-sugars, 203 mg/g lignin and 58 mg/g furfural on PCC were achieved via adding 0.8 mg/g PDADMAC2 (i.e. higher MW PDADMAC) to PCC/PHL system.
authors: Department of Chemical Engineering, Lakehead University, Thunder Bay, Ontario, Canada P7B 5E1. pfatehi@lakeheadu.ca
authors: Pedram
authors: P
authors: Fatehi
authors: Jing
authors: J
authors: Shen
authors: Fadia C
authors: FC
authors: Hamdan
authors: Yonghao
authors: Y
authors: Ni
mesh_terms: D000180:Acrylic Resins / Q000737:chemistry; D000327:Adsorption; D002119:Calcium Carbonate / Q000737:chemistry*; D011232:Chemical Precipitation; D006868:Hydrolysis; D007700:Kinetics; D008031:Lignin / Q000737:chemistry*; D011095:Polyethylenes / Q000737:chemistry; D000644:Quaternary Ammonium Compounds / Q000737:chemistry; D013499:Surface Properties; D013696:Temperature; D014934:Wood / Q000737:chemistry*; D000099166:Polyacrylamides
chemical_list: D000180:Acrylic Resins; D002119:Calcium Carbonate; D008031:Lignin; D011095:Polyethylenes; D000644:Quaternary Ammonium Compounds; D000099166:Polyacrylamides; C036909:lignocellulose; C041004:poly-N,N-dimethyl-N,N-diallylammonium chloride