Hydrothermal liquefaction of macroalgae: Influence of zeolites based catalyst on products. Issue 2 (April 2020)

• Record Type: Journal Article
• Authors: Ma, Chuantao; Geng, Jiguo; Zhang, Dong; Ning, Xuefeng
• Is Part Of: Journal of the Energy Institute. Volume 93:Issue 2(2020)
• Page Start: 581
• Page End: 590
• Publication Date: 2020-04
• Subjects: Hydrothermal liquefaction -- Ulva prolifera macroalgae -- Zeolites catalysts -- Bio-oil; Power (Mechanics) -- Periodicals; Power resources -- Periodicals; Fuel -- Periodicals; 621.04205
• DOI: 10.1016/j.joei.2019.06.007
• Languages: English
• ISSNs: 1743-9671

Abstract

Abstract: Hydrothermal liquefaction (HTL) of Ulva prolifera macroalgae (UP) was carried out in the presence of three zeolites based catalysts (ZSM-5, Y-Zeolite and Mordenite) with the different weight percentage (10–20 wt%) at 260–300 °C for 15–45 min. A comparison between non-catalytic and catalytic behavior of ZSM-5, Y-Zeolite, and Mordenite in the conversion of Ulva prolifera showed that is affected by properties of zeolites. Maximum bio-oil yield for non-catalytic liquefaction was 16.6 wt% at 280 °C for 15 min. The bio-oil yield increased to 29.3 wt% with ZSM-5 catalyst (15.0 wt%) at 280 °C. The chemical components and functional groups present in the bio-oils are identified by GC-MS, FT-IR, 1 H-NMR, and elemental analysis techniques. Higher heating value (HHV) of bio-oil (32.2–34.8 MJ/kg) obtained when catalyst was used compared to the non-catalytic reaction (21.2 MJ/kg). The higher de-oxygenation occurred in the case of ZSM-5 catalytic liquefaction reaction compared to the other catalyst such as Y-zeolite and mordenite. The maximum percentage of the aromatic proton was observed in bio-oil of ZSM-5 (29.7%) catalyzed reaction and minimum (1.4%) was observed in the non-catalyst reaction bio-oil. The use of zeolites catalyst during the liquefaction, the oxygen content in the bio-oil reduced to 17.7%. Aqueous phase analysis exposed that presence of valuables nutrients. Highlights: Catalytic HTL was studied with different temperatures and zeolites catalysts. Maximum bio-oil was obtained (29.3 wt%) with ZSM-5 catalyst. Different zeolite showed influences in the product distributions. The liquefaction aqueous phase showed that it is consists of valuable nutrients.