Quantifying Liquid-Solid Mass Transfer in a Trickle Bed Using $${T}_{2}-{T}_{2}$$ Relaxation Exchange NMR

Abstract Measurement of the liquid-solid mass transfer coefficient within a trickle bed (i.e. gas-liquid flow packed bed) porous silica pellets is achieved through use $${T}_{2}-{T}_{2}$$ T 2 - relaxation exchange nuclear magnetic resonance (NMR). Compared to many conventional measurement techniques, NMR method enables transport using real commercial interest. Mass coefficients measured technique over range liquid Reynolds number, 0.2 $$\le R{e}_{\mathrm{L}}\le $$ ≤ R e L 1.4, are compared number literature correlations, with values falling predicted by correlations. The results demonstrate importance considering both conditions and type used develop correlations in beds. This novel application may be utilized future screen catalyst beds for optimal properties.