Development of small-pore zeolites with enhanced durability utilizing phosphonium compounds as both a structure-directing agent and a phosphorous modification agent

2017 Fiscal Year Final Research Report

• Project/Area Number: 16K14481
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Catalyst/Resource chemical process
• Research Institution: Hiroshima University
• Principal Investigator: Sano Tsuneji 広島大学, 工学研究科, 教授 (80251974)
• Co-Investigator(Kenkyū-buntansha): 津野地 直 広島大学, 工学研究科, 助教 (40758166)
• Project Period (FY): 2016-04-01 – 2018-03-31
• Keywords: ゼオライト / 水熱転換 / リン修飾 / NH3-SCR

Outline of Final Research Achievements

Microporous aluminosilicate zeolites, which have attractive structural features in terms of their selective separation, storage, and conversion of suitable chemicals, are important industrial materials vital both environmentally and commercially. We have now attempted to synthesize P-modified small-pore zeolites using a mixture of N-containing OSDA(ammonium cation) and P-containing OSDA(phosphonium cation). The phosphorus-modified zeolites had high thermal stability. In addition, in the selective catalytic reduction of NOx with NH3(NH3-SCR), the Cu-loaded phosphorus-modified zeolite catalysts exhibited NO conversion above 80%, even after hydrothermal treatment at 1173 K for 8 h, indicating extremely high hydrothermal stability. Therefore, the use of P-containing OSDAs as phosphorous modification agents is the most promising method for preparing phosphorus-modified small-pore zeolites with enhanced thermal/hydrothermal stability.

Free Research Field

ゼオライト化学