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A Cr-loaded zeolite cannot be considerably deactivated by coke deposition and can be reused for LDPE cracking without regeneration. The Cr species interact with hydroxyl groups derived from structural defects...

Nowadays, the increase in plastic waste is causing serious environmental problems. Catalytic cracking has been considered a promising candidate to solve these problems. Catalytic cracking has emerged as an attractive process that can produce valuable products from plastic wastes. Solid acid catalysts such as zeolites decompose the plastic waste at a lower temperature. The lower decomposition temperature may be desirable for practical use. Herein, we synthesized both Zr- and Al-incorporated Beta zeolite using amorphous ZrO 2 –SiO 2 . The optimized Zr content in the dry gel allowed the enhancement of Lewis acidity without a significant loss of Brønsted acidity. The enhancement of Lewis acidity was mainly due to Zr species incorporated into the zeolite framework. Thanks to the enhanced Lewis acidity without any significant loss of Brønsted acidity, higher polymer decomposition efficiency was achieved than a conventional Beta zeolite.

Ethane dehydroaromatization (EDA) is a promising method for synthesizing benzene, toluene, and xylene (BTX) to meet the increasing demand for these compounds. Zn2+-ion exchanged MFI-type zeolite (ZnZSM-5) is an active...

This study investigated catalytic activity on low-density polyethylene (LDPE) cracking over metal-doped Beta zeolites. We prepared various metal cations loaded Beta zeolites as screening by an impregnation method. Tl- and...