The aim of this study was to determine the effect of various biomass ashes, comprising catalytically active components, on tire char reactivity during the CO₂ gasification process. Ashes from the combustion of corn cobs, beet pulp, sunflower husks and beech chips were selected for the research. Moreover, industrial fly ash from a coal-fired power plant was used as a reference. The tire char-ash blends with different ash contents (0–15 wt%) were gasified in the CO₂ atmosphere under non-isothermal conditions using dynTHERM Rubotherm thermobalance. Based on the n-order Coats and Redfern method, gasification reactivity indicators and kinetics parameters were calculated. The results showed that the addition of biomass ashes enhanced reactivity of tire char, and the magnitude of these changes depended on both the quantity and type of the additive. With the increase in the amount of added biomass ashes, the catalytic effect increased, and their efficiency can be ranked as follows: sunflower husk ash > corn cobs ash ≅ beet pulp ash > beech chips ash. In turn, reference fly ash from a power plant slightly affected the CO₂ gasification of tire char, regardless of its amount. Moreover, a statistically significant correlation between the reactivity indicator and the amount of K₂O, MgO and P₂O₅ in ashes analysed has been proved (reactivity indicator improved with an increase in these components amount). The performed analysis provides valuable information regarding the composition of catalysts characterised by high catalytic activity in the tire char gasification process.

本研究的目的是确定包含催化活性成分的各种生物质灰分对 CO ₂气化过程中轮胎炭反应性的影响。研究选择了玉米芯、甜菜浆、向日葵壳和山毛榉木片燃烧产生的灰烬。此外，以燃煤电厂的工业粉煤灰作为参考。具有不同灰分含量（0-15 wt%）的轮胎炭灰混合物在 CO ₂使用 dynTHERM Rubotherm 热天平在非等温条件下测量大气。基于n阶Coats和Redfern方法，计算了气化反应性指标和动力学参数。结果表明，生物质灰的添加增强了轮胎炭的反应性，这些变化的幅度取决于添加剂的数量和类型。随着生物质灰分添加量的增加，催化效果增强，其效率排序为：葵花壳灰＞玉米芯灰≅甜菜浆灰＞山毛榉木屑灰。反过来，来自发电厂的参考飞灰对轮胎炭的 CO ₂气化产生轻微影响，无论其数量如何。此外，反应性指标与 K 量之间的统计显着相关性₂ O、MgO 和 P ₂ O ₅在分析的灰烬中得到证实（反应性指标随着这些组分量的增加而提高）。所进行的分析提供了有关在轮胎炭气化过程中具有高催化活性的催化剂组成的有价值的信息。