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<p>High silica ZSM-5 is a promising catalyst for the methanol to propylene (MTP) process but requires improved stability and regenerability on an industrial scale. Here, we prepared a nano-sized ZSM-5 via the seeding technique and developed its physiochemical characteristics using combined desilication and phosphorus modification. This approach combines the advantages of the above-mentioned methods and can be easily scaled up to an industrial level. The resulting catalyst exhibited a prolonged catalytic lifetime (77 days; about three times that of conventional ZSM-5) with high regenerability (70% restored catalytic activity in the second reaction cycle) and also produced a high amount of propylene from converted methanol (<InlineEquation ID="IEq1"> <EquationSource Format="TEX">\(\:{\text{A}}_{{\text{C}}_{\text{3}}{\text{H}}_{\text{6}}}\)</EquationSource> </InlineEquation>) at lifetime per gram of zeolite catalysts (293.9 <InlineEquation ID="IEq2"> <EquationSource Format="TEX">\(\:{\text{g}}_{{\text{C}}_{\text{3}}{\text{H}}_{\text{6}}}\text{/}{\text{g}}_{\text{cat}}\)</EquationSource> </InlineEquation>&#xa0;in the first reaction cycle and 203.1 <InlineEquation ID="IEq3"> <EquationSource Format="TEX">\(\:{\text{g}}_{{\text{C}}_{\text{3}}{\text{H}}_{\text{6}}}\text{/}{\text{g}}_{\text{cat}}\)</EquationSource> </InlineEquation> in the second reaction cycle). It could be concluded that shortening the diffusion path, mesoporization, and moderating the acidity are responsible for such high stability and regenerability.</p>

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Improving stability and regenerability of nano-sized ZSM-5 zeolite in MTP reaction: toward a reliable industrial catalyst

  • 期刊论文

  • 发表日期：

    2025年10月13日

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  • Amirhossein Javdani,
  • Javad Ahmadpour,
  • Fereydoon Yaripour

摘要

High silica ZSM-5 is a promising catalyst for the methanol to propylene (MTP) process but requires improved stability and regenerability on an industrial scale. Here, we prepared a nano-sized ZSM-5 via the seeding technique and developed its physiochemical characteristics using combined desilication and phosphorus modification. This approach combines the advantages of the above-mentioned methods and can be easily scaled up to an industrial level. The resulting catalyst exhibited a prolonged catalytic lifetime (77 days; about three times that of conventional ZSM-5) with high regenerability (70% restored catalytic activity in the second reaction cycle) and also produced a high amount of propylene from converted methanol ( \(\:{\text{A}}_{{\text{C}}_{\text{3}}{\text{H}}_{\text{6}}}\) ) at lifetime per gram of zeolite catalysts (293.9 \(\:{\text{g}}_{{\text{C}}_{\text{3}}{\text{H}}_{\text{6}}}\text{/}{\text{g}}_{\text{cat}}\)  in the first reaction cycle and 203.1 \(\:{\text{g}}_{{\text{C}}_{\text{3}}{\text{H}}_{\text{6}}}\text{/}{\text{g}}_{\text{cat}}\) in the second reaction cycle). It could be concluded that shortening the diffusion path, mesoporization, and moderating the acidity are responsible for such high stability and regenerability.