Pyrolysis can be regarded as a roadmap towards a circular and sustainable economy for waste tires (WT). This work investigates the operational characteristics of a novel twin-auger reactor to transform WT by intermediate pyrolysis into tire pyrolysis oil (TPO), recovery carbon black (rCB), and tire pyrolysis gas (TPG). The influence of four operating parameters: reactor temperature (X₁), WT mass flow rate (X₂), solid residence time (X₃) and N₂ volumetric flow rate (X₄), was assessed in order to maximize the TPO yield (Y₁), while keeping the rCB one (Y₂) as low as possible. The experimental campaign was conducted based on central composite design (CCD). The analysis of variance (ANOVA) showed that X₁ and X₂ exhibit the highest statistical influence. An optimization of both responses resulted in TPO, rCB, and TPG yields of 45, 40 and 15 wt%, respectively, when the pyrolyzer is operated at 475 °C, 1.16 kg/h, 3.5 min and 300 mL/min. At these conditions, the resulting TPO showed contents of C, H, S, N and O around 88.2, 9.7, 1.3, 0.7 and <0.1 wt%, respectively, along with a heating value of 42.02 MJ/kg. The rCB is comprised of moisture, volatile matter, fixed carbon, and ash around 2.5, 3.7, 75.5, and 18.3 wt%, respectively; while the TPG was mainly composed of H₂ (23.7 vol%) and CH₄ (28.2 vol%). Overall, these results suggest that twin-auger pyrolyzers are well suited for valorizing WT by intermediate pyrolysis.

热解可以被视为迈向循环和可持续的废轮胎经济的路线图。这项工作研究了新型双螺杆反应器的运行特性，该反应器通过中间热解将WT转化为轮胎热解油（TPO），回收炭黑（rCB）和轮胎热解气（TPG）。为了最大化TPO产量，评估了四个操作参数的影响：反应器温度（X ₁），WT质量流量（X ₂），固体停留时间（X ₃）和N ₂体积流量（X ₄）。 （Y ₁），同时保持rCB为一（Y ₂）越低越好。实验活动是基于中央复合设计（CCD）进行的。方差分析（ANOVA）显示X ₁和X ₂表现出最高的统计影响。当热解器在475°C，1.16 kg / h，3.5 min和300 mL / min的温度下运行时，两种响应的优化分别导致TPO，rCB和TPG的产率分别为45、40和15 wt％。在这些条件下，所得的TPO显示出C，H，S，N和O的含量分别为约88.2、9.7、1.3、0.7和＜0.1重量％，并且发热量为42.02MJ / kg。rCB分别由水分，挥发性物质，固定碳和灰分约2.5、3.7、75.5和18.3 wt％组成；TPG主要由H ₂（23.7 vol％）和CH组成₄（28.2体积％）。总体而言，这些结果表明，双螺杆热解炉非常适合通过中间热解对WT进行增值。