A feasible process for furfural production from the pre-hydrolysis liquor of corncob via biochar catalysts in a new biphasic system.
A feasible approach was developed to produce furfural from the pre-hydrolysis liquor of corncob via biochar catalysts as the solid acid catalyst in a new biphasic system with dichloromethane (DCM) as the organic phase and the concentrated pre-hydrolysis liquor (CPHL) containing NaCl as the aqueous phase. The biochar catalyst possessing many acidity groups (SO3H, COOH and phenolic OH groups) was prepared by the carbonization and sulfonation process of the corncob hydrolyzed residue. The influence of the catalytic condition on furfural yield and selectivity was comparatively studied. It was found that 81.14% furfural yield and 83.0% furfural selectivity were obtained from CPHL containing 5wt% xylose using this biochar catalyst in the CPHL-NaCl/DCM biphasic system at 170°C for 60min. In addition, with the regeneration process, this catalyst displayed the high performance and excellent recyclability.
State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, China.
Aojie
A
Deng
State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, China.
Qixuan
Q
Lin
State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, China.
Yuhuan
Y
Yan
State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, China.
Huiling
H
Li
State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, China. Electronic address: renjunli@scut.edu.cn.
Junli
J
Ren
State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, China.
Chuanfu
C
Liu
State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, China; Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University, Beijing 100083, China.
Runcang
R
Sun
D000143:Acids / Q000737:chemistry; D001709:Biotechnology / Q000379:methods*; D002244:Carbon / Q000737:chemistry; D002384:Catalysis; D002606:Charcoal / Q000378:metabolism*; D005662:Furaldehyde / Q000378:metabolism*; D006868:Hydrolysis; D056951:Photoelectron Spectroscopy; D059027:Recycling; D013451:Sulfonic Acids / Q000737:chemistry; D013696:Temperature; D013818:Thermogravimetry; D013997:Time Factors; D014865:Waste Disposal, Fluid; D014867:Water / Q000737:chemistry
D000143:Acids; D013451:Sulfonic Acids; C540010:biochar; D014867:Water; D002606:Charcoal; D002244:Carbon; D005662:Furaldehyde
Biphasic system; Concentrated pre-hydrolysis liquor; Corncob residue; Furfural; Sulfonated carbon-based catalysts