title: Microwave-enhanced pyrolysis of natural algae from water blooms.
abstract: Microwave-enhanced pyrolysis (MEP) of natural algae under different reaction conditions was carried out. The optimal conditions for bio-oil production were the following: algae particle size of 20-5 mesh, microwave power of 600W, and 10% of activated carbon as microwave absorber and catalyst. The maximum liquid yield obtained under N2, 10% H2/Ar, and CO2 atmosphere was 49.1%, 51.7%, and 54.3% respectively. The energy yield of bio-products was 216.7%, 236.9% and 208.7% respectively. More long chain fatty acids were converted into hydrocarbons by hydrodeoxygenation under 10% H2/Ar atmosphere assisted by microwave over activated carbon containing small amounts of metals. Under CO2 atmosphere, carboxylic acids (66.6%) were the main products in bio-oil because the existence of CO2 vastly inhibited the decarboxylation. The MEP of algae was quick and efficient for bio-oil production, which provided a way to not only ameliorate the environment but also obtain fuel or chemicals at the same time.
authors.affiliation: Key Laboratory of Green Chemistry and Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu, Sichuan 610064, PR China.
authors.forename: Rui
authors.initials: R
authors.lastname: Zhang
authors.affiliation: Key Laboratory of Green Chemistry and Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu, Sichuan 610064, PR China.
authors.forename: Linling
authors.initials: L
authors.lastname: Li
authors.affiliation: Key Laboratory of Green Chemistry and Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu, Sichuan 610064, PR China.
authors.forename: Dongmei
authors.initials: D
authors.lastname: Tong
authors.affiliation: Key Laboratory of Green Chemistry and Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu, Sichuan 610064, PR China. Electronic address: changweihu@scu.edu.cn.
authors.forename: Changwei
authors.initials: C
authors.lastname: Hu
mesh_terms: D056804:Biofuels; D001709:Biotechnology / Q000379:methods*; D002245:Carbon Dioxide; D002264:Carboxylic Acids / Q000737:chemistry; D002384:Catalysis; D002606:Charcoal; D005068:Eutrophication; D005227:Fatty Acids / Q000737:chemistry; D006838:Hydrocarbons / Q000737:chemistry; D006859:Hydrogen / Q000737:chemistry; D008872:Microwaves; D009584:Nitrogen / Q000737:chemistry; D010316:Particle Size
chemical_list: D056804:Biofuels; D002264:Carboxylic Acids; D005227:Fatty Acids; D006838:Hydrocarbons; D002245:Carbon Dioxide; D002606:Charcoal; D006859:Hydrogen; D009584:Nitrogen
keywords: Activated carbon; Algae; Catalytic hydrodeoxygenation; Microwave-enhanced pyrolysis; Pyrolytic atmosphere