title: Thermogravimetric characteristics and pyrolysis kinetics of alga Sagarssum sp. biomass.
abstract: Alga Sagarssum sp. can be converted to bio-oil, gas, and char through pyrolysis. In this study, the pyrolysis characteristics and kinetics of Sagarssum sp. were investigated using a thermogravimetric analyzer and tubing reactor, respectively. Sagarssum sp. decomposed below 550°C, but the majority of materials decomposed between 200 and 350°C at heating rates of 5-20°C/min. The apparent activation energy increased from 183.53 to 505.57 kJ mol(-1) with increasing pyrolysis conversion. The kinetic parameters of Sagarssum sp. pyrolysis were determined using nonlinear least-squares regression of the experimental data, assuming second-order kinetics. The proposed lumped kinetic model represented the experimental results well and the kinetic rate constants suggested a predominant pyrolysis reaction pathway from Sagarssum sp. to bio-oil, rather than from Sagarssum sp. to gas. The kinetic rate constants indicated that the predominant reaction pathway was A (Sagarssum sp.) to B (bio-oil), rather than A (Sagarssum sp.) to C (gas; C1-C4).
authors.affiliation: Department of Chemical Engineering, Kangwon National University, 1 Joongang-ro, Samcheok, Gangwon-do 363-883, Republic of Korea. sskim2008@kangwon.ac.kr
authors.forename: Seung-Soo
authors.initials: SS
authors.lastname: Kim
authors.forename: Hoang Vu
authors.initials: HV
authors.lastname: Ly
authors.forename: Jinsoo
authors.initials: J
authors.lastname: Kim
authors.forename: Jae Hyung
authors.initials: JH
authors.lastname: Choi
authors.forename: Hee Chul
authors.initials: HC
authors.lastname: Woo
mesh_terms: D018533:Biomass; D004602:Elements; D008401:Gas Chromatography-Mass Spectrometry; D006358:Hot Temperature; D007700:Kinetics; D010938:Plant Oils; D012624:Seaweed / Q000378:metabolism*; D013818:Thermogravimetry / Q000379:methods*
chemical_list: D004602:Elements; D010938:Plant Oils