title: Non-catalytic hydropyrolysis of microalgae to produce liquid biofuels.
abstract: Non-catalytic hydropyrolysis of Chlorella pyrenoidosa was studied by using a stainless-steel batch reactor at different temperature (150-450 °C), time (5-120 min) and initial hydrogen pressure (1 atm-8 MPa), aiming to find how these parameters affect the product (oil, gas and solid) yields and properties of the hydropyrolysis oil (HPO). Temperature was the most influential factor to the relative amount of each product and properties of the HPOs. The hydrogen favored the stabilization of the active intermediates but cannot guarantee to produce HPOs in higher hydrogen at its higher initial pressure. The HPO, which showed much difference in component strongly depending on the reaction conditions, mainly consisted of aromatics and straight-chain hydrocarbons, amides, amines, nitriles and carboxylic acids at moderate temperatures. The main gas products detected during the hydropyrolysis were unreacted H2, CO2, CO and CH4. About 85% of energy originally present in the microalgae was recovered as oil under the optimal conditions.
authors.affiliation: College of Physics and Chemistry, Department of Applied Chemistry, Henan Polytechnic University, Jiaozuo, Henan 454003, PR China. pgduan@hpu.edu.cn
authors.forename: Peigao
authors.initials: P
authors.lastname: Duan
authors.forename: Xiujun
authors.initials: X
authors.lastname: Bai
authors.forename: Yuping
authors.initials: Y
authors.lastname: Xu
authors.forename: Aiyun
authors.initials: A
authors.lastname: Zhang
authors.forename: Feng
authors.initials: F
authors.lastname: Wang
authors.forename: Lei
authors.initials: L
authors.lastname: Zhang
authors.forename: Juan
authors.initials: J
authors.lastname: Miao
mesh_terms: D056804:Biofuels / Q000382:microbiology*; D001709:Biotechnology / Q000379:methods*; D002152:Calorimetry, Differential Scanning; D002384:Catalysis / Q000187:drug effects; D002708:Chlorella / Q000166:cytology / Q000187:drug effects / Q000378:metabolism*; D006859:Hydrogen / Q000494:pharmacology*; D058086:Microalgae / Q000166:cytology / Q000187:drug effects / Q000378:metabolism*; D009821:Oils / Q000378:metabolism*; D011312:Pressure; D017550:Spectroscopy, Fourier Transform Infrared; D013696:Temperature; D013818:Thermogravimetry; D013997:Time Factors
chemical_list: D056804:Biofuels; D009821:Oils; D006859:Hydrogen