Coke formation inside heterogeneous reactors is an important industrial problem that leads to reduced catalyst efficiency. However, this study aims to prove the benefits of coke build-up in improving catalyst performance. The formation and decomposition of coke on six different zeolite structures was studied. The dissociation kinetic model of the spent catalysts during the toluene alkylation with 1-heptene inside a stainless-steel autoclave reactor at different temperatures was carried out. Various techniques (XRD, XRF, TPO, CHNS and TGA-DTG) were used. It was found that the conversion and selectivity of the desired product were higher on the parent H-mordenite and the dealuminated H-beta catalysts with conversions of 85.3% and 84.67%, respectively, at a 360 min reaction time. This was attributed to the reduction of the ratio of hard:soft coke. It is confirmed that the decomposition activation energies of hard coke, 140.1–202.6 kJ/mol, are much higher energies than those of soft coke, 89.9–118.7 kJ/mol. It is also noted that the hypothesis of pore mouth catalysis is dominated by non-polyaromatic coke on the surface of the H-beta catalysts, while the hypothesis is dominated by polyaromatic coke on the surface of the H-mordenite catalysts.

非均相反应器内的焦炭形成是一个重要的工业问题，会导致催化剂效率降低。然而，这项研究旨在证明焦炭堆积在提高催化剂性能方面的好处。研究了焦炭在六种不同沸石结构上的形成和分解。建立了不锈钢高压釜反应器内不同温度下甲苯与1-庚烯烷基化过程中废催化剂的离解动力学模型。使用了各种技术（XRD、XRF、TPO、CHNS 和 TGA-DTG）。结果发现，母体 H-丝光沸石和脱铝 H-β 催化剂上所需产物的转化率和选择性较高，在 360 分钟的反应时间内，转化率分别为 85.3% 和 84.67%。这是由于硬焦与软焦的比例降低所致。经证实，硬焦的分解活化能为140.1~202.6 kJ/mol，远高于软焦的分解活化能89.9~118.7 kJ/mol。还值得注意的是，孔口催化假说以H-β催化剂表面的非聚芳焦为主，而该假说以H-丝光沸石催化剂表面的聚芳焦为主。