Department of Mechanical Engineering, University of Idaho, Idaho Falls, ID 83402, USA.
Department of Mechanical Engineering, University of Idaho, Idaho Falls, ID 83402, USA.
Ultrason Sonochem. 2021 May;73:105502. doi: 10.1016/j.ultsonch.2021.105502. Epub 2021 Feb 23.
Recent interest in biomass-based fuel blendstocks and chemical compounds has stimulated research efforts on conversion and upgrading pathways, which are considered as critical commercialization drivers. Existing pre-/post-conversion pathways are energy intense (e.g., pyrolysis and hydrogenation) and economically unsustainable, thus, more efficient process solutions can result in supporting the renewable fuels and green chemicals industry. This study proposes a process, including biomass conversion and bio-oil upgrading, using mixed fast and slow pyrolysis conversion pathway, as well as sono-catalytic transfer hydrogenation (SCTH) treatment process. The proposed SCTH treatment employs ammonium formate as a hydrogen transfer additive and palladium supported on carbon as the catalyst. Utilizing SCTH, bio-oil molecular bonds were broken and restructured via the phenomena of cavitation, rarefaction, and hydrogenation, with the resulting product composition, investigated using ultimate analysis and spectroscopy. Additionally, an in-line characterization approach is proposed, using near-infrared spectroscopy, calibrated by multivariate analysis and modeling. The results indicate the potentiality of ultrasonic cavitation, catalytic transfer hydrogenation, and SCTH for incorporating hydrogen into the organic phase of bio-oil. It is concluded that the integration of pyrolysis with SCTH can improve bio-oil for enabling the production of fuel blendstocks and chemical compounds from lignocellulosic biomass.
最近，人们对基于生物质的燃料调合原料和化合物的兴趣激发了对转化和升级途径的研究工作，这些途径被认为是关键的商业化驱动因素。现有的预处理/后处理途径能源密集（例如热解和加氢）且在经济上不可持续，因此，更有效的工艺解决方案可以支持可再生燃料和绿色化学品产业。本研究提出了一种包括生物质转化和生物油升级的工艺，使用混合快速和慢速热解转化途径，以及声催化转移加氢（SCTH）处理工艺。所提出的 SCTH 处理采用甲酸铵作为氢转移添加剂和负载在碳上的钯作为催化剂。利用 SCTH，通过空化、稀疏和加氢等现象，打破和重构生物油分子键，使用最终分析和光谱法研究所得产物的组成。此外，还提出了一种在线特征化方法，使用近红外光谱，并通过多元分析和建模进行校准。结果表明，超声空化、催化转移加氢和 SCTH 具有将氢引入生物油有机相的潜力。结论是，将热解与 SCTH 结合可以改善生物油，从而能够从木质纤维素生物质生产燃料调合原料和化合物。
