Bulk binary ZrO2-based oxides as highly active alternative-type catalysts for non-oxidative isobutane dehydrogenation

Area of Science:

• Materials Science
• Catalysis
• Chemical Engineering

Background:

• Non-oxidative dehydrogenation of isobutane to isobutylene is a key industrial process.
• Developing efficient and stable catalysts is crucial for improving this process.
• ZrO2-based oxides are promising catalytic materials.

Purpose of the Study:

• To investigate the catalytic activity of bulk binary ZrO2-based oxides for isobutane dehydrogenation.
• To evaluate the effect of the second metal oxide on catalyst performance.
• To design and test a superior CrZrOx catalyst.

Main Methods:

• Synthesis of bulk binary ZrO2-based oxides.
• Testing catalytic activity in non-oxidative dehydrogenation of isobutane.
• Evaluating catalyst stability under reaction and regeneration cycles.
• Comparison with supported Pt and CrOx catalysts.

Main Results:

• CrZrOx exhibited superior catalytic activity compared to industrially relevant catalysts.
• Catalyst performance was highly dependent on the second metal oxide used.
• The CrZrOx catalyst demonstrated excellent stability over 110 hours under alternating reaction and regeneration cycles.
• Optimal reaction temperatures were found to be between 550 and 600 °C.

Conclusions:

• Bulk binary ZrO2-based oxides are effective catalysts for isobutane dehydrogenation.
• CrZrOx represents a highly active and stable catalyst for this transformation.
• The findings offer a promising alternative to current industrial catalysts.