title: Gas-liquid countercurrent integration process for continuous biodiesel production using a microporous solid base KF/CaO as catalyst.
abstract: A continuous-flow integration process was developed for biodiesel production using rapeseed oil as feedstock, based on the countercurrent contact reaction between gas and liquid, separation of glycerol on-line and cyclic utilization of methanol. Orthogonal experimental design and response surface methodology were adopted to optimize technological parameters. A second-order polynomial model for the biodiesel yield was established and validated experimentally. The high determination coefficient (R(2)=98.98%) and the low probability value (Pr<0.0001) proved that the model matched the experimental data, and had a high predictive ability. The optimal technological parameters were: 81.5°C reaction temperature, 51.7cm fill height of catalyst KF/CaO and 105.98kPa system pressure. Under these conditions, the average yield of triplicate experiments was 93.7%, indicating the continuous-flow process has good potential in the manufacture of biodiesel.
authors.affiliation: State Key Laboratory of Agricultural Microbiology, College of Science, Huazhong Agricultural University, Wuhan 430070, China.
authors.forename: Shengyang
authors.initials: S
authors.lastname: Hu
authors.forename: Libai
authors.initials: L
authors.lastname: Wen
authors.forename: Yun
authors.initials: Y
authors.lastname: Wang
authors.forename: Xinsheng
authors.initials: X
authors.lastname: Zheng
authors.forename: Heyou
authors.initials: H
authors.lastname: Han
mesh_terms: D000327:Adsorption; D056804:Biofuels / Q000032:analysis* / Q000191:economics; D017610:Calcium Compounds / Q000737:chemistry*; D002384:Catalysis; D003377:Countercurrent Distribution; D005240:Feasibility Studies; D005459:Fluorides / Q000737:chemistry*; D005740:Gases / Q000737:chemistry*; D007700:Kinetics; D009584:Nitrogen / Q000737:chemistry; D010087:Oxides / Q000737:chemistry*; D016062:Porosity; D017680:Potassium Compounds / Q000737:chemistry*; D012015:Reference Standards; D012044:Regression Analysis; D012212:Rheology; D013696:Temperature
chemical_list: D056804:Biofuels; D017610:Calcium Compounds; D005740:Gases; D010087:Oxides; D017680:Potassium Compounds; C033320:potassium fluoride; C016538:lime; D009584:Nitrogen; D005459:Fluorides