High Selective Fiber Glass Woven Catalysts Doped by Noble Metals in the Reactions of Aromatic Nitro-compounds Reduction

摘要

The features of liquid-phase hydrogenation of trinitrotoluene and trinitrobenzene over woven silica fiberglass (SFG) catalysts doped by Pt (Pt content 0,1 wt.%) were investigated. Specific surface area (SSA) of the catalysts was ranged from 1 to 15 m~2/g. The traditional Pd/C powdered catalyst (Pd content 5 wt.%, SSA of 500 m~2/g) was used as reference sample. The SFG catalysts showed a higher specific activity than conventional Pd/C one. An unexpected finding for SFG catalysts was that hydrogenation rates of second and third nitro-groups in trinitrotoluene and trinitrobenzene were, respe ctively, by one and two orders of magnitude less than that of the first one. The selectivity effect was found to decrease with increasing of SSA for SFG catalysts and wasn't revealed at all for Pd/C sample.