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On the possibility of a significant temperature gradient in supported metal catalysts subjected to microwave heating

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Abstract

A simple model is presented which estimates the temperature gradients in microwave-irradiated 1 and 100 nm metallic particles which are typically found in a supported metal catalyst structure. The two particle sizes allow limiting case calculations of the temperature rise over the range of typical particle sizes. The model, based on a simple steady-state energy balance, uses the assumption that the particles only lose heat to the gas-phase, and not the support matrix. This represents a best-case scenario for a temperature gradient relative to the surroundings. The model indicates that the temperature gradient is insignificant and this conclusion is supported by an experiment in which the microwave-driven carbon monoxide reaction acts as an in situ temperature probe.

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Authors
  1. W.L. Perry
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  2. D.W. Cooke
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  3. J.D. Katz
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  4. A.K. Datye
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Perry, W., Cooke, D., Katz, J. et al. On the possibility of a significant temperature gradient in supported metal catalysts subjected to microwave heating. Catalysis Letters 47, 1–4 (1997). https://doi.org/10.1023/A:1019020013544

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