Boreskov Institute of Catalysis of the Siberian Branch of Russian ...

OP-V-7Ca 2 Fe 2 O 5 , MgFe 2 O 4 and FeO-MgO solid solution for iron/dolomite, NiO-MgO solid solutionfor Ni/dolomite. After reduction by TPR, only free metal (M 0 ) and metal oxide-magnesiumoxide solid solution has been detected, leaving free CaO available for CO 2 capture.The experiments for catalytic steam reforming of tar components and CO 2 capture werecarried out by using fixed bed microreactor and bench scale fluidised bed. The first choice isfocused on evaluating catalytic reaction rate data, whereas fluidised bed represent commonindustrial applications of biomass gasification plants. The aim of this work being to reproducebiomass gasification conditions in the gasifier, reactivity of M/dolomite catalysts has beeninvestigated in a mixture of tar model, steam and syngas, varying mainly steam/hydrocarbonsratio and reaction temperature. The schematic diagram of the experimental setup, for fluidisedbed reactor, is shown in Fig.1. Briefly, 1-methylnaphthalene (1-MN) liquid circulates througha heated column. A N 2 constant flow, entering in this column, produces a 1-MN saturatednitrogen stream, circulating into reactor entrance via heated line. To avoid condensation andstabilise the mixture of 1-MN-N 2 in the range 10.000-50.000 ppm of 1-MN, a pre-heatedprimary nitrogen line has been added to the reactor inlet flow system. The 1-MNconcentration has been monitored by a MultiFID 14 analyser before and after reactor.Moreover, H 2 , CO, CO 2 and CH 4 concentrations in the product gas has been detected by usinggas analyser URAS 14, leading to comprehensive understanding of the process.Catalytic activity of M/dolomite catalysts will be discussed in details in order to evaluatetar purification and CO 2 adsorption capacity and stability.Liquid 1-MNcirculationII ary N2 +1-MNvaporsexit pointMass flowcontrollerWaterethyleneglycolheatedcolumnT1SecondaryNitrogen flowAnalyzerF.I.D.P2T2AnalyzerF.I.D.REACTOR0 °CICEInsulating materialHeated tubes at 150 °COUT1-MNtankLiquid 1-MNcirculationFurnaceT=220°CP1FurnaceT R =630°CCatalyticbedFilterOUTPrimaryNitrogen flowDataacquisitionIntroducingsystemWaterinReactionsystemAnalysingandacquisitionsystemAnalyzerUras 14H 2CH 4COCO 2Figure 1: Schematic of the bench-scale fluidised bed reactor system180