State Key Laboratory of Food Science and Resources, Engineering Research Center for Biomass Conversion, Ministry of Education, Nanchang University, Nanchang 330047, China.
Key Laboratory of Poyang Lake Environment and Resource Utilization, Ministry of Education, and School of Resources & Environment, Nanchang University, Nanchang 330031, China.
Bioresour Technol. 2024 Aug;406:130984. doi: 10.1016/j.biortech.2024.130984. Epub 2024 Jun 14.
Lignocellulosic biomass, renewable with short growth cycle and diverse sources, can be substituted fossil fuel. However, low effective hydrogen-to-carbon ratio (H/C) limits its applications. Torrefaction and co-pyrolysis with high H/C feedstocks are promising technology. This paper investigated the effect of heating modes on oil-bath torrefaction of walnut shells, followed by fast co-pyrolysis. Six heating modes during oil-bath torrefaction were evaluated. Com1 (Microwave 67 %, Lightwave 33 %) yielded the lowest residual yield 84 wt%, while the highest gas production 495.47 mL/g which mainly composed of CO and CO. Torrefied feedstock under Com1 had the highest H/C. Decarboxylation and decarbonylation reactions dominated among oil-bath torrefaction. Com1 produced the most hydrocarbons and least oxygen-containing compounds. As microwave ratio decreased, the content of olefins, acids and phenols decreased, monocyclic aromatic hydrocarbons and alcohols was showed opposite tend. This study offers new ideas for microwave and lightwave torrefaction and promoting hydrocarbon production from lignocellulosic biomass.
木质纤维素生物质可再生，生长周期短，来源多样，可以替代化石燃料。然而，其氢碳比（H/C）有效率低限制了其应用。热解和与高 H/C 原料的共热解是很有前途的技术。本文研究了加热方式对核桃壳油浴热解的影响，随后进行了快速共热解。评估了油浴热解过程中的六种加热方式。Com1（微波 67%，激光 33%）的残炭率最低，为 84wt%，气体产率最高，为 495.47mL/g，主要由 CO 和 CO 组成。Com1 下的热解原料具有最高的 H/C。脱羧和脱羰反应在油浴热解中占主导地位。Com1 产生的烃类最多，含氧化合物最少。随着微波比例的降低，烯烃、酸和酚的含量减少，而单环芳烃和醇的含量则呈现相反的趋势。本研究为微波和激光热解提供了新的思路，促进了从木质纤维素生物质中生产烃类。
