Photocatalytic Conversion of Carbon Dioxide and Methane Over Titania Nanoparticles Coated Mesh: Optimization Study

Abstract:

Immobilized titania (TiO₂) nanoparticles semiconductor on stainless steel mesh was used for photocatalytic conversion of CO₂ and CH₄. This study utilized experimental design and process optimization tools to maximize the desired response using response surface methodology (RSM) with central composite rotatable design (CCRD). The experimental parameters were stainless steel mesh size, titania nanoparticles loading, calcination temperature, UV light power and initial ratios of CO₂:CH₄:N₂ in feed. The optimal conditions were determined as follows: stainless steel mesh size of 140, 4 g of coated titania nanoparticles on mesh, calcination temperature of 600 °C, UV light power of 250 W and 10% of CO₂ in feed to achieve a maximum CO₂ conversion of 37.87%. Correspondingly, the selectivity of products were 4.66%, 4.28%, 3.97% and 87.09%, for ethane, acetic acid, formic acid and methyl acetate, respectively.

1. Saeed Delavari and Nor Aishah Saidina Amin (2015). Photocatalytic Conversion of Carbon Dioxide and Methane Over Titania Nanoparticles Coated Mesh_ Optimization Study: Optimization study, Energy Procedia, 61 (2014), 2485 – 2488. DOI: https://doi.org/10.1016/j.egypro.2014.12.028