摘要
We carried out experimental studies concerning the plasma-chemicalsynthesis(PCS) of a catalyst for CH_4 steam conversion and designed and built the equipment for PCSand/ or regeneration of spent catalyst for CH_4 steam conversion. Under the conditions of anelectric-arc low-temperature plasma (LTP), we studied the Ni-O-Al system and performed acomprehensive physicochemical analysis of the ultradispersed product obtained. It's the first timeworldwide when the conditions of plasma-chemical synthesis and/ or regeneration of CH_4 steamconversion catalysts under the conditions of electric-arc LTP are investigated depending on theplasma-chemical process (PCP) parameters and the plasma-chemical reactor (PCP) type (with CW-'coldwalls' T_W = 500 K or WW-'warm walls' T_W = 1500 K), samples with a specific surface of 120 m^2/gare obtained. Plasma-chemically synthesized and/ or regenerated samples have a homogenous chemicalcomposition similar to that the Girdller (USA) conventional industrial catalyst. It is empiricallyestablished that the optimal temperature range in PCR for synthesis of samples with maximumdispersity is (2000～3000) K. Results from investigation on dynamics and kinetics ofplasma-chemically synthesized and / or regenerated catalysts for CH4 steam conversion show thatunder LTP conditions premises for the formation of catalyst compositions are established. They arereduced 3 to 4 times faster than their industrial analogues. High specific surface of the samples,homogenous composition, high rate of active chemical surface formed by reduction, faulty crystallattice of catalytically active phases and mostly high catalytic activity make them a potentialcompetitor with their industrial analogues for their probable production in catalyst shops.
We carried out experimental studies concerning the plasma-chemicalsynthesis(PCS) of a catalyst for CH_4 steam conversion and designed and built the equipment for PCSand/ or regeneration of spent catalyst for CH_4 steam conversion. Under the conditions of anelectric-arc low-temperature plasma (LTP), we studied the Ni-O-Al system and performed acomprehensive physicochemical analysis of the ultradispersed product obtained. It's the first timeworldwide when the conditions of plasma-chemical synthesis and/ or regeneration of CH_4 steamconversion catalysts under the conditions of electric-arc LTP are investigated depending on theplasma-chemical process (PCP) parameters and the plasma-chemical reactor (PCP) type (with CW-'coldwalls' T_W = 500 K or WW-'warm walls' T_W = 1500 K), samples with a specific surface of 120 m^2/gare obtained. Plasma-chemically synthesized and/ or regenerated samples have a homogenous chemicalcomposition similar to that the Girdller (USA) conventional industrial catalyst. It is empiricallyestablished that the optimal temperature range in PCR for synthesis of samples with maximumdispersity is (2000～3000) K. Results from investigation on dynamics and kinetics ofplasma-chemically synthesized and / or regenerated catalysts for CH4 steam conversion show thatunder LTP conditions premises for the formation of catalyst compositions are established. They arereduced 3 to 4 times faster than their industrial analogues. High specific surface of the samples,homogenous composition, high rate of active chemical surface formed by reduction, faulty crystallattice of catalytically active phases and mostly high catalytic activity make them a potentialcompetitor with their industrial analogues for their probable production in catalyst shops.
