摘要：基体孔结构与分布特性对硫酸催化剂反应过程的传质和传热过程有直接的影响，直接关乎其催化活性提升和使用寿命延长，主要作用是为参与反应的SO2、O2及生成的SO3进出基体提供通道。我们在压汞（MIP）测试基础上，引入3d-CT技术对Cat.01和Cat.02两种硫酸催化剂样品基体孔结构与分布进行了表征，并与MIP测定的数据进行了对比分析，结果表明：3d-CT在基体大孔结构与分布分析方面具有更加直观和准确的效果，弥补了MIP法在基体超级孔结构分析方面的不足。由此可见准确客观测定和评价催化剂基体孔结构与分布情况最为有效的方式是采用MIP和3d-CT组合，这对催化剂设计开发和产品性能提升具有重要指导作用。关键词：硫酸催化剂；基体孔结构与分布；3d-CT；压汞测试
Abstract The pore structure and distribution characteristics
of the matrix have a direct impact on the mass and heat transfer processes
during the reaction of sulfuric acid catalysts, directly affecting their
catalytic activity enhancement and service life extension. The main function is
to provide channels for the entry and exit of SO2, O2 and
the generated SO3 into and out of the matrix during the reaction.
Based on the mercury intrusion porosimetry (MIP) test, we introduced the 3d-CT
technology to characterize the pore structure and distribution of two sulfuric
acid catalyst samples, Cat.01 and Cat.02, and compared the results with the
data obtained from the MIP test. The results show that 3d-CT has a more
intuitive and accurate effect in analyzing the large-pore structure and
distribution of the matrix, and makes up for the deficiency of the MIP method
in analyzing the super-pore structure of the matrix. Therefore, it can be seen
that the most effective way to accurately and objectively determine and
evaluate the pore structure and distribution of the catalyst matrix is to use
the combination of MIP and 3d-CT, which has important guiding significance for
catalyst design and development and product performance improvement.
Key-words： Solid catalyst; Matrix pore structure and
distribution; 3D-CT; Mercury pressure test
关键词：硫酸催化剂；基体孔结构与分布；3d-CT；压汞测试
Abstract The pore structure and distribution characteristics
of the matrix have a direct impact on the mass and heat transfer processes
during the reaction of sulfuric acid catalysts, directly affecting their
catalytic activity enhancement and service life extension. The main function is
to provide channels for the entry and exit of SO2, O2 and
the generated SO3 into and out of the matrix during the reaction.
Based on the mercury intrusion porosimetry (MIP) test, we introduced the 3d-CT
technology to characterize the pore structure and distribution of two sulfuric
acid catalyst samples, Cat.01 and Cat.02, and compared the results with the
data obtained from the MIP test. The results show that 3d-CT has a more
intuitive and accurate effect in analyzing the large-pore structure and
distribution of the matrix, and makes up for the deficiency of the MIP method
in analyzing the super-pore structure of the matrix. Therefore, it can be seen
that the most effective way to accurately and objectively determine and
evaluate the pore structure and distribution of the catalyst matrix is to use
the combination of MIP and 3d-CT, which has important guiding significance for
catalyst design and development and product performance improvement.
Key-words： Solid catalyst; Matrix pore structure and
distribution; 3D-CT; Mercury pressure test
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