School of Agricultural Engineering and Food Science, Shandong University of Technology, Zibo 255000, Shandong, China.
School of Agricultural Engineering and Food Science, Shandong University of Technology, Zibo 255000, Shandong, China.
Bioresour Technol. 2019 Feb;274:207-214. doi: 10.1016/j.biortech.2018.11.093. Epub 2018 Nov 27.
Catalytic upgrading of biomass pyrolysis vapors is an effective utilization technology of biomass energy. Based on the disadvantages of commonly used reactors, the V-shaped downer reactors were designed to increase gas-solid two-phase turbulent intensity, contact frequency and then increase the catalytic efficiency in short residence time. The catalytic upgrading of pyrolysis vapors in V-shaped downer reactors in terms of hydrodynamics, chemical reaction and residence time distribution were analyzed by CFD simulation and experiment. The results indicate that the solid concentration gradient decreases while flowing down. The overall mass fraction of the bio-oil vapors is around 50%. The mean residence time of catalysts in the V-shaped reactor is 2.0 s-3.0 s. The effects on product yield and residence time distribution were investigated for optimizing product selectivity and the performance of catalysts. In this paper the optimal flow rates of gas and catalysts are v = 1.2 m s, v = 0.4 m s.
生物质热解气的催化升级是生物质能源的一种有效利用技术。基于常用反应器的缺点，设计了 V 形下行式反应器，以增加气固两相的湍流强度、接触频率，从而在短停留时间内提高催化效率。通过 CFD 模拟和实验对 V 形下行式反应器中热解气的催化升级进行了流体动力学、化学反应和停留时间分布分析。结果表明，固体浓度沿下降方向呈梯度下降。生物油蒸气的总质量分数约为 50%。V 型反应器中催化剂的平均停留时间为 2.0-3.0s。考察了操作条件对产物收率和停留时间分布的影响，以优化产物选择性和催化剂性能。本文优化了气速和催化剂速度，v=1.2m/s，v=0.4m/s。
