Catalyst for directly preparing low carbon olefin through hydrogenation of carbon dioxide and preparation method thereof
A low-carbon olefin and catalyst technology, applied in the field of catalyst and its preparation, can solve the problems of poor catalyst stability, high by-product selectivity, and reduced olefin selectivity, and achieve long reaction life, environmental friendliness, and high olefin yield. Effect
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[0025] 1. Catalyst preparation
[0026] (1) Synthesis of mixed oxides by calcination method
[0027] with K 2 CO 3 (KNO 3 ), Fe(NO 3 ) 3 9H 2 O, TiO 2 Samples of different masses were weighed in a certain ratio as raw materials, mixed evenly in a mortar, fully ground, and roasted at 500 °C for 3 h. The roasted samples were ground evenly.
[0028] (2) Preparation of layered K–Fe–Ti catalysts by high-temperature solid-state method
[0029] Take (1) 2 g of the powder sample obtained after calcination, and keep the gas flow rate at 50 mL min in the air atmosphere –1 , after thorough grinding in a tube furnace (15 °C–500 °C, 5 °C / min; 500 °C–800 °C, 10 °C / min; 800 °C–1000 °C, 5 °C / min; 1000 °C–1100 °C, 2 °C / min) were calcined at 1100 °C for 10 h, and cooled naturally. The roasted samples were ground evenly.
[0030] 2. Catalyst Characterization
[0031] According to the XRD characterization test, the catalyst sample has layered characteristic diffraction peaks at 2θ =...
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