Proceedings of the Combustion Institute ( IF 3.4 ) Pub Date : 2020-07-31 , DOI: 10.1016/j.proci.2020.06.079 Hesameddin Fatehi , Mário Costa , Xue-Song Bai
In this paper, the interaction between different organic and inorganic K/S/Cl compounds in the solid structure of biomass is studied and a model is presented to predict the temporal release of Kg, HCl, CH3Cl, KCl, KOH, K2SO4 and SO2 from biomass devolatilization. Four types of pulverized biomass are chosen from literature, two of which have no chlorine content and two with chlorine content in lower stoichiometry to potassium. The results of the model are compared with the experimental measurements. In the presence of chlorine, KCl, HCl and Kg were found to be the dominant chlorine and potassium species. In the absence of chlorine, Kg dominates the release of potassium. KOH and K2SO4 release into the gas phase towards the end of devolatilization due to the overlapping with char combustion. SO2 is the main sulfur species released into the gas phase. The model is coupled with a CFD solver where the gas phase chemistry of the K/S/Cl system can be studied using available chemical mechanisms for these species.
中文翻译:
高温下粉状生物质脱挥发分过程中K / S / Cl释放的数值研究
在本文中,不同的有机和无机k之间的相互作用/ S /氯化合物中的生物质的固体结构进行研究,并提出了一个模型来预测K的临时解除克,盐酸,CH 3氯,氯化钾,KOH,K 2生物质脱挥发分产生的SO 4和SO 2。从文献中选择了四种类型的粉状生物质,其中两种不含氯,而两种氯的化学计量比钾低。将模型的结果与实验测量值进行比较。在氯的存在下,氯化钾,盐酸和K克被认为是主要的氯和钾的物种。在无氯的情况下,K g钾的释放占主导地位。由于与焦炭燃烧的重叠,KOH和K 2 SO 4在脱挥发分的末期释放到气相中。SO 2是释放到气相中的主要硫物种。该模型与CFD求解器结合使用,在其中可以使用这些物种的可用化学机理来研究K / S / Cl系统的气相化学。