研究目的
To establish a direct visual link between pore architecture and molecular transport in porous catalyst bodies under realistic catalytic conditions, using fluorescent nanoprobes and confocal fluorescence microscopy.
研究成果
The study successfully establishes a direct visual relationship between pore architecture and molecular transport in porous catalyst bodies, demonstrating the potential of fluorescence microscopy in designing more efficient heterogeneous catalysts. The approach can be extended to other porous materials, offering broad applicability in materials science and catalysis.
研究不足
The study focuses on specific types of catalyst bodies (Z:Kaolin and Z:Bento) and may not be directly applicable to all porous materials without further validation. The technique requires specific fluorescent probes and microscopy equipment, which may limit its accessibility.
1：Experimental Design and Method Selection:
An integrated, facile bio-imaging-inspired approach using fluorescent nanoprobes and confocal fluorescence microscopy (CFM) was employed to visualize pore accessibility and interconnectivity in industrial-grade catalyst bodies.
2：Sample Selection and Data Sources:
Two different clay-bound ZSM-5-based catalyst bodies (Z:Kaolin and Z:Bento) were impregnated with four specifically sized fluorescent nanoprobes (~2, 20, 45, and 100 nm in diameter).
3：List of Experimental Equipment and Materials:
Confocal fluorescence Nikon Eclipse 90i microscope, FluoSpheres carboxylate-modified microspheres, N,N′-bis(2,6-dimethylphenyl)-perylene-3,4,9,10-tetracarboxylic diimide (PDI).
4：Experimental Procedures and Operational Workflow:
Catalyst bodies were impregnated with fluorescent nanoprobes, incubated for various time periods, bisected, and imaged using CFM. A separate methanol-to-hydrocarbon (MTH) reaction was performed to correlate pore architecture with molecular transport.
5：Data Analysis Methods:
Probe penetration depths were measured manually using microscope software, and the data were analyzed to establish a relationship between pore architecture and molecular transport.
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