Ni-Al/SiO2 Hydrogenation Catalyst Precursor for Resin Stability
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Solution Overview
Problem
Current hydrogenation catalysts for petrochemical resins exhibit limited catalytic activity, particularly in thermal and oxidative stability, necessitating the development of a more effective catalyst system for improved performance.
Innovation Solution
A hydrogenation catalyst precursor comprising Ni, Al, and a SiO2 support material, where Ni is supported on the SiO2, exhibiting a specific peak maximum in temperature programmed reduction, achieving high Ni dispersion and enhanced catalytic activity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional hydrogenation catalysts are used, then the basic hydrogenation function is provided, but the catalytic activity is limited and thermal/oxidative stability is insufficient
Solution Approach 1:
The patent employs a composite catalyst system combining nickel particles supported on silica-alumina with specific pore structures. The composite nature of the catalyst (Ni/SiO2-Al2O3) provides both high catalytic activity from the nickel component and enhanced thermal/oxidative stability from the stable oxide support structure, resolving the contradiction between activity and stability
Solution Approach 2:
The patent utilizes porous silica-alumina support materials with specifically controlled pore volumes (≥0.4 ml/g) and pore size distributions. The porous structure provides high surface area for nickel dispersion (enhancing activity) while the stable oxide framework maintains structural integrity under thermal and oxidative conditions (enhancing stability)
2Productivity
If nickel loading is increased to improve catalytic activity, then hydrogenation performance improves, but Ni aggregation occurs reducing effectiveness
Solution Approach 1:
The patent creates localized high-surface-area regions on the porous silica-alumina support where nickel particles are dispersed. The specific pore structure creates favorable local environments that prevent nickel aggregation even at high loadings, maintaining both high activity and stable composition through optimized local nickel distribution
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The catalyst precursor demonstrates improved activity in hydrogenation reactions, with a lower peak maximum in temperature programmed reduction, leading to enhanced stability and performance in petrochemical resin hydrogenation.
Implementation Method 1
the precursor exhibits a specific peak maximum in the temperature programmed reduction
Implementation Method 2
a hydrogenation is normally performed. As such, the double bonds, the reason for the thermal and oxidative instability, are removed
Implementation Method 3
these usually comprise nickel as the catalytically active component
Implementation Method 4
the Ni is supported on the support material comprising SiO2
Data Source
AI summary
The present invention relates to a specific hydrogenation catalyst and to its precursor. Further, the present invention relates to methods for preparation of the hydrogenation catalyst and its precursor and use thereof. In particular, the specific hydrogenation catalyst and its precursor comprise Ni, Al, and a support material comprising SiO2, wherein the Ni is supported on the support material, and wherein the precursor exhibits a specific peak maximum in the temperature programmed reduction.