Instituto de Ingeniería Química - Facultad de Ingeniería (UNSJ) - Grupo Vinculado al PROBIEN (CONICET-UNCo), San Juan, Argentina.
Instituto de Investigación y Desarrollo en Ingeniería de Procesos, Biotecnología y Energías Alternativas, PROBIEN (CONICET-UNCo), Neuquén, Argentina.
J Environ Manage. 2019 Mar 1;233:626-635. doi: 10.1016/j.jenvman.2018.12.087. Epub 2018 Dec 31.
The kinetics of the steam-assisted gasification for three different agro-industrial solid wastes (sawdust, olive and plum pits) was studied by macro thermo-gravimetric analysis (macro-TGA) at different heating rates (5, 10 and 15 K/min). The progressive CO release was moreover monitored to fully identify each step of the global gasification process. A single-step kinetics modelling was applied by using the Coats-Redfern method, with both a first order model for pyrolysis and a Ginstling - Brounstein 3D-diffusion model for the gasification stages, respectively. A comparison between macro-TGA and previous TGA results for the same bio-wastes was performed. Results indicated that the reaction proceeds in three well-defined and subsequent stages, involving water evaporation [298-473 K], biomass de-volatilization [473-648 K] with the highest production of CO, and char gasification as final step. Reaction rate parameters of the Arrhenius equation were determined for both the pyrolysis and gasification steps.
采用宏观热重分析（macro-TGA）在不同升温速率（5、10 和 15 K/min）下研究了三种不同农业工业固体废物（木屑、橄榄和李核）的蒸汽辅助气化动力学。此外，还监测了渐进的 CO 释放，以完全识别全球气化过程的每个步骤。通过使用 Coats-Redfern 方法应用了单步动力学建模，分别为热解采用一级模型，为气化阶段采用 Ginstling - Brounstein 3D 扩散模型。对宏观热重分析和相同生物废物的先前热重分析结果进行了比较。结果表明，反应在三个定义明确且连续的阶段进行，涉及水蒸发[298-473 K]、生物质挥发[473-648 K]，产生最高量的 CO，以及作为最终步骤的炭气化。确定了热解和气化步骤的阿累尼乌斯方程的反应速率参数。
