2.6. Experimental setup for catalytic performance test
Fig. 6 illustrates the experimental setup for the activity testing of the Ni-based nanocatalysts in dry reforming of methane. This setup is made of three main sections: gas feeding section consists of gas cylinders and mass flow controllers; reaction section consists of a fixed bed reactor and temperature-controlled furnace; and an analytical section consists of a gas chromatography system. Evaluation of the Ni-based nanocatalysts in dry reforming of methane were carried out at atmospheric pressure, temperature range of 550–850 °C with feed ratio of CH4/CO2 = 1, in a U-shape quartz reactor (ID = 6 mm and length = 30 cm) with 0.1 g catalyst loading. Before each reaction test, the nanocatalysts were reduced using a gas mixture of H2/N2 = 1/9, with a flow rate of 30 cm3/min at 700 °C for 1 h. The GHSV was set at 24 l/g h during activity test. The stability test was performed over 1200 min. A gas chromatography (GC Chrom, TeifGostarFaraz, Iran) has used for analysis of outlet and inlet streams that equipped with FID and TCD detectors and a Carboxen-1000 column (Agilent). The temperature of the column was set at 220 °C. The carrier gas of GC was Ar. For calculation of reactants conversion (Xi) and products yield (Yi) the following formulas are used:
2.6. Experimental setup for catalytic performance testFig. 6 illustrates the experimental setup for the activity testing of the Ni-based nanocatalysts in dry reforming of methane. This setup is made of three main sections: gas feeding section consists of gas cylinders and mass flow controllers; reaction section consists of a fixed bed reactor and temperature-controlled furnace; and an analytical section consists of a gas chromatography system. Evaluation of the Ni-based nanocatalysts in dry reforming of methane were carried out at atmospheric pressure, temperature range of 550–850 °C with feed ratio of CH4/CO2 = 1, in a U-shape quartz reactor (ID = 6 mm and length = 30 cm) with 0.1 g catalyst loading. Before each reaction test, the nanocatalysts were reduced using a gas mixture of H2/N2 = 1/9, with a flow rate of 30 cm3/min at 700 °C for 1 h. The GHSV was set at 24 l/g h during activity test. The stability test was performed over 1200 min. A gas chromatography (GC Chrom, TeifGostarFaraz, Iran) has used for analysis of outlet and inlet streams that equipped with FID and TCD detectors and a Carboxen-1000 column (Agilent). The temperature of the column was set at 220 °C. The carrier gas of GC was Ar. For calculation of reactants conversion (Xi) and products yield (Yi) the following formulas are used:
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