Experimental and kinetic studies of the advantages of coke accumulation over Beta and Mordenite catalysts according to the pore mouth catalysis hypothesis

• DOI: 10.1016/j.catcom.2023.106718
• Publication Date: 2023-06-16T16:14:18Z
• Authors: Ali Al-Shathr; Bashir Y. Al-Zaidi; Amal K. Shehab; Zaidoon M. Shakoor; Safa Aal-Kaeb; Laura Quintana Gomez; Hasan Sh. Majdi; Emad N. Al-Shafei; Adnan A. AbdulRazak; James McGregor
• Keywords: Mordenite

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