Characterization of the bio-oil and bio-char produced by fixed bed pyrolysis of the brown alga Saccharina japonica

• Published in: The Korean journal of chemical engineering Vol. 33; no. 9; pp. 2691 - 2698
• Main Authors: Choi, Jae Hyung, Kim, Seung-Soo, Suh, Dong Jin, Jang, Eun-Jung, Min, Kyung-Il, Woo, Hee Chul
• Format: Journal Article
• Language: English
• Published: New York Springer US 01.09.2016; Springer Nature B.V; 한국화학공학회
• Subjects: Biotechnology; Catalysis; Chemistry; Chemistry and Materials Science; Gas flow; Industrial Chemistry/Chemical Engineering; Materials Science; Moisture content; Separation Technology; Surface area; Thermodynamics; 화학공학; Fixed Bed Pyrolysis; Bio-char; Bio-oil; Fuel Property
• ISSN: 0256-1115; 1975-7220
• DOI: 10.1007/s11814-016-0131-5

Brown alga Saccharina japonica was pyrolyzed in a fixed bed reactor under conditions intended to maximize the yield of bio-oil and bio-char. The results revealed that the product distribution of bio-oil, bio-char, and gas was considerably influenced by the pyrolysis temperature (430-530 °C) and holding time (4-10min). The maximum yields of bio-oil and bio-char were approximately 48.4 and 32.3wt%, respectively, when prepared at 450 °C for 8min with a carrier gas flow rate of 2.2 cm/s. The fuel properties of dewatered S. japonica bio-oil (DSB) included higher heating value (HHV), kinematic viscosity, density, moisture and ash content, pH, and flash and pour point. The possibility of blending 5-20 vol% DSB with No. 6 fuel oil (Bunker C oil) was also examined. The physicochemical properties of the bio-char exhibited decreased carbon and HHV, and increased inorganic elements and surface area, with increasing pyrolysis temperature.