Insights into molecular accessibility in catalyst and sorbent materials using NMR porosity measurements

NMR measurements of porosity are demonstrated for a range of catalyst and sorbent materials. The NMR method allows porosity measurements to be carried out directly with the molecules of interest for a given reaction or separation process, thereby providing valuable information regarding accessibility of that molecular species to the pore network during process operation. NMR measurements of porosity allow the actual porosity experienced by molecules of interest to be directly measured.