Recovering valuable chemicals (BTEX: Benzene, toluene, ethylbenzene, and xylene) via catalytic pyrolysis of waste tires is a promising and sustainable approach. Zinc loaded tire derived char (TDC) was used as cheap catalyst for recovering valuable BTEX products from waste tire through pyrolysis in this study. The catalytic capability of TDC on BTEX production were experimentally investigated with respect to Zn content, catalytic temperature, and catalyst-to-tire ratio. Due to the abundant acid sites on the surface, the TDC showed notable catalytic capability for improving BTEX yield which was 2.4 times higher than that from uncatalyzed case. The loading of additional Zn increased the acid sites on the TDC and the catalytic performance was further improved. The increase of catalytic temperature and catalyst-to-tire ratio favored the formation of BTEX, but it also brought undesirable consequences, such as the mass loss of tire pyrolysis oil (TPO) and the formation of polycyclic aromatic hydrocarbons. The optimal TPO products were obtained at 600 °C with catalyst-to-tire ratio of 20. At this condition, the relative content of BTEX reached 54.70% and the cumulative BTEX yield was 10.13 wt%, increasing by 5.95 times compared to that of non-catalytic condition. This work provided a novel strategy of replacing traditional expensive catalysts with low-cost and effective carbon-based materials in the field of catalytic pyrolysis of waste tires.

通过废轮胎的催化热解来回收有价值的化学品（BTEX：苯、甲苯、乙苯和二甲苯）是一种有前景且可持续的方法。在这项研究中，加载锌的轮胎衍生炭 (TDC) 被用作廉价催化剂，通过热解从废轮胎中回收有价值的 BTEX 产品。实验研究了 TDC 对 BTEX 生产的催化能力，包括 Zn 含量、催化温度和催化剂与轮胎的比率。由于表面有丰富的酸性位点，TDC 表现出显着的催化能力，提高了 BTEX 产率，比未催化的情况高 2.4 倍。额外的 Zn 负载增加了 TDC 上的酸性位点，进一步提高了催化性能。催化温度和催化剂轮胎比的增加有利于BTEX的形成，但也带来了不良后果，如轮胎热解油（TPO）的质量损失和多环芳烃的形成。在600℃下得到最佳TPO产物，催化剂轮胎比为20。在此条件下，BTEX的相对含量达到54.70%，累积BTEX产率为10.13 wt%，比原先增加了5.95倍。非催化条件。这项工作为废轮胎催化热解领域提供了一种用低成本、有效的碳基材料替代传统昂贵催化剂的新策略。在600°C下获得最佳TPO产物，催化剂轮胎比为20。在该条件下，BTEX的相对含量达到54.70%，累积BTEX产率为10.13 wt%，比原先增加了5.95倍。非催化条件。这项工作为废轮胎催化热解领域提供了一种用低成本、有效的碳基材料替代传统昂贵催化剂的新策略。在600℃下得到最佳TPO产物，催化剂轮胎比为20。在此条件下，BTEX的相对含量达到54.70%，累积BTEX产率为10.13 wt%，比原先增加了5.95倍。非催化条件。这项工作为废轮胎催化热解领域提供了一种用低成本、有效的碳基材料替代传统昂贵催化剂的新策略。