title: Process optimization for microwave-assisted direct liquefaction of Sargassum polycystum C.Agardh using response surface methodology.
abstract: Response surface methodology (RSM) was used to optimize the microwave-assisted direct liquefaction of Sargassum polycystum C.Agardh in ethylene glycol (EG) with H(2)SO(4) as a catalyst. Based on the results of single factor experiments, EG-to-feedstock ratio, temperature and catalyst content were chosen as independent variables for a central composite rotatable design (CCRD). The optimal liquefaction conditions were estimated as: the EG-to-feedstock ratio of 18.50:1 (w/w), the temperature of 170°C, the reaction time of 15 min, catalyst content of 9.6% (catalyst/EG, w/w%) and microwave power of 400 W with the liquefaction yield of 87.70%. The bio-oils were mainly composed of fatty acid methyl ester and alkane with a long chain from C(17) to C(20).
authors: Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology, School of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng 252059, China.
authors: Jingxue
authors: J
authors: Guo
authors: Yingbin
authors: Y
authors: Zhuang
authors: Limei
authors: L
authors: Chen
authors: Junhai
authors: J
authors: Liu
authors: Demao
authors: D
authors: Li
authors: Naihao
authors: N
authors: Ye
mesh_terms: D001709:Biotechnology / Q000379:methods*; D002384:Catalysis / Q000187:drug effects; D004560:Electricity; D019855:Ethylene Glycol / Q000494:pharmacology; D008401:Gas Chromatography-Mass Spectrometry; D008872:Microwaves; D008954:Models, Biological; D044647:Sargassum / Q000187:drug effects / Q000378:metabolism*; D017550:Spectroscopy, Fourier Transform Infrared; D013696:Temperature; D013997:Time Factors
chemical_list: D019855:Ethylene Glycol