Department of Chemical Engineering, King Fahd University of Petroleum & Minerals, Dhahran, 31261, Saudi Arabia.
Department of Chemical and Petroleum Engineering, Schulich School of Engineering, University of Calgary, 2500 University Drive NW, Calgary, Alberta, T2 N 1 N4, Canada.
Chem Asian J. 2021 Mar 1;16(5):507-520. doi: 10.1002/asia.202001271. Epub 2021 Feb 2.
This communication reports the beneficial effects of co-gasification of biomass and residual oil to produce syngas. In this regard, various blends of glucose (a biomass surrogate) to vacuum gas oil (VGO) have been employed to investigate the synergic effects on the gasification process. The non-isothermal co-gasification experiments were conducted in a thermogravimetric analyzer at different heating rates and gasifying agents. The analysis showed that the co-gasification rate increased with the increase of glucose content in the feedstock. The presence of the oxygen in the biomass molecules helped the overall gasification process. The maximum gasification rate of 42.70 wt/min (DTG ) was observed with 25 wt% glucose containing sample. The use of gasifying agents appeared to have some influence, especially during high temperature gasification of the glucose-VGO blends. At a same gasification temperature, the co-gasification rate of glucose-VGO blends were found to be 125.7 wt/min and 98.59 wt%/min for N and CO , respectively. The kinetics of the co-gasification of glucose-VGO blends was conducted based on modified random pore model using TGA experimental data and implemented in MATLAB. The estimated activation energy and rate constants were found to be consistent to the observed co-gasification rates. The apparent activation energies of co-gasification of VGO/biomass blends with different weight percentages shows values ranging 60.56-48.25 kJ/mol. The kinetics analysis suggested that the addition of biomass helped to increase the reaction rate by lowering the activation energy required for accomplishing the reactions compared with petroleum carbonaceous feedstocks. The reaction rate constants isotherms are plotted to show that the k-values are exhibiting similar trends at moderate heating rates between 20 and 60 °C/min. This remark arises due to the nature of the reactions involved which are considered to be inherently similar in this range of heating rate.
本论文报道了生物质与渣油共气化制取合成气的有益效果。为此，采用葡萄糖（生物质替代物）与减压瓦斯油（VGO）的不同混合物来考察气化过程的协同效应。在不同升温速率和气化剂条件下，采用热重分析仪进行了非等温热气化实验。分析表明，随着进料中葡萄糖含量的增加，共气化速率增加。生物质分子中的氧存在有助于整个气化过程。在含有 25wt%葡萄糖的样品中观察到最大气化速率为 42.70wt/min（DTG）。气化剂的使用似乎有一定的影响，特别是在葡萄糖-VGO 混合物的高温气化过程中。在相同的气化温度下，发现葡萄糖-VGO 混合物的共气化速率分别为 N 和 CO 的 125.7wt/min 和 98.59wt%/min。基于 TGA 实验数据，采用改进的随机孔模型对葡萄糖-VGO 混合物的共气化动力学进行了研究，并在 MATLAB 中进行了实现。估计的活化能和速率常数与观察到的共气化速率一致。不同重量百分比的 VGO/生物质混合物的共气化表观活化能值在 60.56-48.25kJ/mol 范围内。动力学分析表明，与石油碳质原料相比，生物质的加入通过降低完成反应所需的活化能，有助于提高反应速率。绘制反应速率常数等温线表明，在 20 至 60°C/min 之间的中等升温速率下，k 值表现出相似的趋势。这一发现是由于所涉及的反应的性质所致，在该升温速率范围内，这些反应被认为是固有相似的。
