(a) SEM images of Zn2
fillers and MMMs. (b) Experimental set-up of the membrane reactor for conversion of xylose. (c, d) Furfural yield achieved in the Zn2
-PMPS MR compared with that in a conventional reactor and a PMPS MR. Reproduced from Ref. [92
] with permission from Elsevier, copyright 2016.