In Situ Luminescence Thermometry To Locally Measure Temperature Gradients during Catalytic Reactions

Robin G Geitenbeek; Anne-Eva Nieuwelink; Thimo S Jacobs; Bastiaan B V Salzmann; Joris Goetze; Andries Meijerink; Bert M Weckhuysen

doi:10.1021/acscatal.7b04154

In Situ Luminescence Thermometry To Locally Measure Temperature Gradients during Catalytic Reactions

ACS Catal. 2018 Mar 2;8(3):2397-2401. doi: 10.1021/acscatal.7b04154. Epub 2018 Feb 14.

Authors

Robin G Geitenbeek¹, Anne-Eva Nieuwelink¹, Thimo S Jacobs¹, Bastiaan B V Salzmann¹, Joris Goetze¹, Andries Meijerink¹, Bert M Weckhuysen¹

Affiliation

¹ Condensed Matter and Interfaces, Inorganic Chemistry and Catalysis, Debye Institute for Nanomaterials Science, Utrecht University, Universiteitsweg 99, 3584 CG Utrecht, The Netherlands.

Abstract

Bandshape luminescence thermometry during in situ temperature measurements has been reported by preparing three catalytically relevant systems, which show temperature-dependent luminescence. One of these systems was further investigated as a showcase for application. Microcrystalline NaYF₄ doped with Er³⁺ and Yb³⁺ was mixed with a commercial zeolite H-ZSM-5 to investigate the Methanol-to-Hydrocarbons (MTH) reaction, while monitoring the reaction products with online gas chromatography. Due to the exothermic nature of the MTH reaction, a front of increased temperature migrating down the fixed reactor bed was visualized, showing the potential for various applications of luminescence thermometry for in situ measurements in catalytic systems.