Abstract Catalytic fast pyrolysis (CFP) of beech wood chips was undertaken in a laboratory-scale fixed bed reactor equipped with a biomass semi-continuous dispenser. During pyrolysis, chars are retained on a quartz frit and the pyrolytic vapors are entrained through a fixed-bed catalyst to be converted. Several acidic catalysts such as zeolites H-Beta, zeolite HMFI and 5% Ni supported on HMFI were screened in this equipment. The Ni/HMFI catalyst was also tested in the presence of 1 vol.% of hydrogen in the feed stream. Mass and carbon balances were carefully checked and the gas, liquids and solids fractions were analyzed in-depth to evaluate the impact of the catalyst compared to thermal conversion. In the presence of a catalyst, with a low catalyst-to-biomass ratio of 0.1, a lower amount of bio-oil was formed but it contained less oxygen. The bio-oils were characterized by bi-dimensional GC (GCxGC) coupled with MS and FID detectors. The amount of gaseous products also increased in the presence of all catalysts. In addition of the deoxygenation, gel-permeation chromatography (GPC) showed a decrease of the highest molecular masses in the bio-oil after catalytic treatment, which confirms the conversion of some oligomers. The presence of Ni enhanced the deoxygenation reactions while the addition of H2 is also beneficial to the bio-oil composition.

中文翻译：

---

榉木热解蒸气的催化转化

摘要 山毛榉木片的催化快速热解 (CFP) 在配备有生物质半连续分配器的实验室规模固定床反应器中进行。在热解过程中，焦炭保留在石英玻璃料上，热解蒸汽通过固定床催化剂夹带进行转化。在该设备中筛选了几种酸性催化剂，例如沸石H-Beta、沸石HMFI和负载在HMFI上的5%Ni。Ni/HMFI催化剂也在进料流中存在1体积％的氢气的情况下进行测试。仔细检查质量和碳平衡，并深入分析气体、液体和固体部分，以评估与热转化相比催化剂的影响。在催化剂存在下，当催化剂与生物质的比率为 0.1 时，生成的生物油量较少，但含氧量较少。生物油的特征在于二维 GC (GCxGC) 与 MS 和 FID 检测器的结合。在所有催化剂的存在下，气态产物的量也增加。除了脱氧，凝胶渗透色谱 (GPC) 显示催化处理后生物油中的最高分子量降低，这证实了一些低聚物的转化。Ni 的存在增强了脱氧反应，而 H2 的加入也有利于生物油的组成。这证实了一些低聚物的转化。Ni 的存在增强了脱氧反应，而 H2 的加入也有利于生物油的组成。这证实了一些低聚物的转化。Ni 的存在增强了脱氧反应，而 H2 的加入也有利于生物油的组成。