Sharma Ajay, Nath Ratnadeep
Department of Chemical Engineering, Indian Institute of Technology Roorkee, Roorkee 247667, Uttarakhand, India.
Department of Mechanical Engineering, National Institute of Technology Mizoram, Aizawl 796012, India.
ACS Omega. 2023 Mar 31;8(14):13396-13409. doi: 10.1021/acsomega.3c00908. eCollection 2023 Apr 11.
The aim of this research paper is to develop a chemical kinetic model, based on the mechanism of surface reactions, for air-steam gasification of eucalyptus wood sawdust (CHO) and analyze the hydrogen-rich syngas production. Experiments are performed on a bubbling fluidized-bed gasifier using air-steam as a gasifying agent. For validation of the developed kinetic model, the outcome of the model is compared with that of experimental data, which shows a root-mean-square error of less than 4. Different parameters such as equivalence ratios (0 ≤ ER ≤ 0.4), particle size (100 ≤ Dp ≤ 1000 μm), gasification temperature (900 ≤ ≤ 1200 K), pressure (1 ≤ ≤ 20 atm), and steam-to-biomass ratio (0 ≤ SBR ≤ 2) are considered for the analysis. The one-parameter-at-a-time concept is employed to maximize the production of H-rich syngas. Results indicate that the maximum concentration of hydrogen is 55.04 vol % (experimental) and 51.81 vol % (predicted) at optimum conditions: ER = 0, Dp = 100 μm, = 1100 K, = 1 atm, and SBR = 0.75. Gasification performance parameters such as hydrogen gas yield, heating values, cold gas efficiency, etc., are evaluated.
本研究论文的目的是基于表面反应机理开发一种用于桉木锯末（CHO）空气-蒸汽气化的化学动力学模型，并分析富氢合成气的生产。使用空气-蒸汽作为气化剂在鼓泡流化床气化炉上进行实验。为了验证所开发的动力学模型，将模型结果与实验数据进行比较，结果显示均方根误差小于4。分析时考虑了不同参数，如当量比（0≤ER≤0.4）、粒径（100≤Dp≤1000μm）、气化温度（900≤≤1200K）、压力（1≤≤20atm）和蒸汽与生物质比（0≤SBR≤2）。采用一次改变一个参数的概念来最大化富氢合成气的产量。结果表明，在最佳条件下：ER = 0、Dp = 100μm、= 1100K、= 1atm和SBR = 0.75时，氢气的最大浓度为55.04体积%（实验值）和51.81体积%（预测值）。对氢气产率、热值、冷煤气效率等气化性能参数进行了评估。
