Sustainability Impact Assessment Area (SIA), Material Resource Efficiency Division (MRED), CSIR-Indian Institute of Petroleum (IIP), Dehradun 248005, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India.
Sustainability Impact Assessment Area (SIA), Material Resource Efficiency Division (MRED), CSIR-Indian Institute of Petroleum (IIP), Dehradun 248005, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India.
Bioresour Technol. 2021 Oct;337:125439. doi: 10.1016/j.biortech.2021.125439. Epub 2021 Jun 24.
Carbon-based support catalysts are beneficial on account of low material cost, prominent surface area, and stability at high temperature. In this study, biochar derived activated carbon (AC) supported metal catalysts were tested for hydrothermal liquefaction (HTL) of alkali lignin. Catalytic HTL of alkali lignin was carried out at various temperatures (260 to 300 °C) with varying catalysts quantity (5 to 20 wt%), and solvents (water, ethanol, methanol) for 15 min reaction time. As the reaction temperature increased from 260 to 300 °C, conversion increased from 76.2 to 85.5 wt%. Bimetallic catalyst Ni-Co/AC with ethanol solvent system at 280 °C gave highest bio-oil yield (72.0 wt%). Lignin catalytic depolymerization produces monomer phenolic compounds due to efficient breaking of the lignin macromolecule. Thus, the presence of catalyst and solvent increased the cleavage of β-O-4 bonds resulting in increased selectivity towards vanillin (32.3-36.2%).
基于碳的载体催化剂具有成本低、比表面积大、高温稳定性好等优点。在这项研究中，我们测试了生物炭衍生的活性炭（AC）负载金属催化剂在碱木质素水热液化（HTL）中的应用。在不同的温度（260 至 300°C）下，用不同量的催化剂（5 至 20wt%）和溶剂（水、乙醇、甲醇）进行了 15 分钟的反应时间的催化 HTL。随着反应温度从 260°C 升高到 300°C，转化率从 76.2%增加到 85.5%。在 280°C 下，以乙醇为溶剂的双金属催化剂 Ni-Co/AC 得到了最高的生物油产率（72.0wt%）。木质素的催化解聚由于木质素大分子的有效断裂而产生单体酚类化合物。因此，催化剂和溶剂的存在增加了β-O-4 键的断裂，从而提高了香草醛（32.3-36.2%）的选择性。
