Sorbent with a great quantity of highly dispersed active components is
of importance to achieve excellent desulfurization performance. Thus,
Zn@MnOx/porous carbon nanofibers (PCNFs) sorbents have been constructed
via electrospinning, carbonization, activation and hydrothermal
techniques in this study. The as-prepared sorbent realizes a sulfur
capacity of 9.63 g S 100 g-1 sorbent and a utilization rate 117% of
ZnO, which could be attributed to the synergetic effects of the enlarged
surface area of PCNFs and uniformly distributed active components. The
specific surface area of modified PCNFs is nearly five times higher than
that of the pristine CNFs, providing larger loading area and more
attachment sites for metal oxides. Activation with KMnO4 not only
generates active MnOx components but also presets ‘seed’ for ZnO
crystals growth, which is beneficial for the high dispersion of
nano-sized active components. The presented method is beneficial to
producing sorbents with better structure and promoted desulfurization
performance.
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