Photocatalytic degradation of n-hexane in a circulating fluidized bed: An investigation based on the freeboard entrainment model

Author(s)

Diniz, Leonardo Almeida ; Matsumoto, Danielle ; Silva Costa Teixeira, Antonio Carlos

• Document type: Journal article
• Source: CATALYSIS TODAY; v. 361, p. 8-pg., 2021-02-01.

Abstract

The fluidization behaviour of a circulating fluidized bed (CFB) photoreactor was varied by applying different flow (Q) and solid feed rates (F-s), and the performance of the reactor for the degradation of the target pollutant n-hexane was compared for a wide range of fluidization regimes. The Freeboard Entrainment Model was applied to model and predict the values of solids hold-up (epsilon(s)) in the experimental range evaluated. The optimum n-hexane degradation rate for the CFB was found to be 4.0 x 10(-4) mol m(-3) s(-1) operating in turbulent fluidization regime with epsilon(s) = 0.10 with the finer solid size distribution, demonstrating that high-velocity fluidization regimes can be used to enhance photocatalytic reaction rates based on better UV-photocatalyst contact. (AU)

• FAPESP's process: 16/00953-6 - Photocatalytic reactor development for the treatment of contaminated gas with volatile organic compounds
• Grantee: Danielle Matsumoto
• Support Opportunities: Research Grants - Innovative Research in Small Business - PIPE