title: A study on growth and pyrolysis characteristics of microalgae using Thermogravimetric Analysis-Infrared Spectroscopy and synchrotron Fourier Transform Infrared Spectroscopy.
abstract: This two-part study firstly investigated Tetraselmis suecica grown in different CO2(0.04-15%v/v) concentration through indoor and outdoor cultivation systems. A high CO2concentration led to a high lipid content, and low nitrogen and oxygen content, which are desirable for transport fuel production. Pyrolysis characteristics were investigated by TG-IR and synchrotron IR microscopy. The results show Tetraselmis suecica grown in 10%CO2had the highest decomposition rate corresponding to more volatile products produced during the main thermal cracking stage and derived from protein-and lipid-corresponding functional groups. Moreover, a high reaction temperature and CO2concentration resulted in a low retention of surface functional groups. The nitrogen functional groups initially decomposed at a temperature range of 250-300°C and still remained at 550°C, while the lipid-corresponding functional groups completely disappeared at a temperature range of 400-500°C. Besides, the decomposition of chemical components followed the order of carbohydrate, protein and lipid.
authors.affiliation: Department of Chemical Engineering, Monash University, Wellington Rd, VIC 3800, Australia.
authors.forename: Fanghua
authors.initials: F
authors.lastname: Li
authors.affiliation: Department of Chemical Engineering, Monash University, Wellington Rd, VIC 3800, Australia.
authors.forename: Srikanth Chakravartula
authors.initials: SC
authors.lastname: Srivatsa
authors.affiliation: Department of Chemical Engineering, Monash University, Wellington Rd, VIC 3800, Australia.
authors.forename: Warren
authors.initials: W
authors.lastname: Batchelor
authors.affiliation: Department of Chemical Engineering, Monash University, Wellington Rd, VIC 3800, Australia. Electronic address: sankar.bhattacharya@monash.edu.
authors.forename: Sankar
authors.initials: S
authors.lastname: Bhattacharya
mesh_terms: D001709:Biotechnology / Q000379:methods*; D002245:Carbon Dioxide / Q000494:pharmacology; D006863:Hydrogen-Ion Concentration; D008027:Light; D058086:Microalgae / Q000187:drug effects / Q000254:growth & development* / Q000528:radiation effects; D017550:Spectroscopy, Fourier Transform Infrared; D017356:Synchrotrons; D013696:Temperature; D013818:Thermogravimetry / Q000379:methods*; D014835:Volatilization
chemical_list: D002245:Carbon Dioxide
keywords: Carbon dioxide; FTIR; Microalgae; Pyrolysis; Synchrotron; TG-IR