Satiada Godfrey Bryan D A, Carpio Rowena B, Guerrero Gino Apollo M, Detras Monet Concepcion M, Bambase Manolito E
Department of Chemical Engineering, University of the Philippines Los Baños, College, Laguna, 4031, Philippines.
Heliyon. 2024 Sep 6;10(17):e37520. doi: 10.1016/j.heliyon.2024.e37520. eCollection 2024 Sep 15.
This study investigated the effects of different alkali catalysts (KCO, KOH, NaOH, and NaCO) on the yield and composition of biocrude oil and aqueous products obtained from hydrothermal liquefaction (HTL) of corn stover. HTL was performed in a laboratory-scale tubular reactor at 320 °C for 90 min and catalyst loading of 5.0 and 7.5 % (by weight of biomass). The composition of the biocrude oil and aqueous products was determined using GC-MS. Results revealed that hydroxide catalysts are more effective than carbonate catalysts in increasing biocrude oil yield. Notably, NaOH achieved a high conversion rate of 92-94 % daf (dry and ash-free basis), significantly surpassing the uncatalyzed HTL (69.4 % daf). The highest biocrude oil yield of 22.12-22.57 % daf was obtained using KOH. Si-containing compounds (e.g., silanes and siloxanes) were identified as the most abundant components in the biocrude oil, suggesting potential for further exploration in producing platform chemicals from these compounds.
本研究考察了不同碱催化剂（碳酸钾、氢氧化钾、氢氧化钠和碳酸钠）对玉米秸秆水热液化（HTL）所得生物原油及水性产物的产率和组成的影响。水热液化在实验室规模的管式反应器中于320℃下进行90分钟，催化剂负载量为5.0%和7.5%（基于生物质重量）。使用气相色谱 - 质谱联用仪（GC - MS）测定生物原油和水性产物的组成。结果表明，在提高生物原油产率方面，氢氧化物催化剂比碳酸盐催化剂更有效。值得注意的是，氢氧化钠实现了92 - 94% daf（干基无灰）的高转化率，显著超过未催化的水热液化（69.4% daf）。使用氢氧化钾获得了最高的生物原油产率，为22.12 - 22.57% daf。含硅化合物（如硅烷和硅氧烷）被鉴定为生物原油中最丰富的成分，表明从这些化合物生产平台化学品具有进一步探索的潜力。
