Polymerized microcrystalline catalyst encapsulating cu and fe oxides and its preparation method and application
A catalyst and oxide technology, which is applied in the preparation of organic compounds, physical/chemical process catalysts, molecular sieve catalysts, etc., can solve the problems of difficult diffusion of benzene ring structure, low yield and selectivity of lignin conversion products, and achieve Comprehensive development and utilization and solutions, improved yield and selectivity, and environmentally friendly effects
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Embodiment 1
[0052] Embodiment 1: Catalyst Cu 50 -Fe 50 Preparation of @hier-S-1
[0053] (1) Mix TEOS (15.4mL) and TPAOH (16.5mL) at room temperature for 3h, then add deionized water (44mL), copper citrate (0.25g, 0.7mmol) and iron citrate (0.34g, 1.4 mmol), and then stirred overnight at 35 °C. The molar composition of the formed gel is 1TEOS:0.27TPAOH:0.02CuO:0.01Fe 2 o 3 :37H 2 O, the gel was heated at 80°C for 4h to remove the ethanol generated. The mixture was then transferred to a lined polytetrafluoroethylene hydrothermal kettle, heated in an oven at 170°C for 72 hours, and after cooling to room temperature, the mixture was centrifuged, and the solid part was dried overnight at 100°C, and then dried in an air atmosphere at 540°C. After firing for 6 hours, the obtained hierarchically porous nanosphere sample was named hier-Cu 50 -Fe 50 -S-1, wherein hier means hierarchical pores, and the molar ratios of Si / Cu and Si / Fe in the catalyst are both 50.
[0054] (2) Hier-Cu obtain...
Embodiment 2
[0061] Example 2: Cu 50 -Fe 50 Preparation of @hier-S-1-ImC
[0062] (1) TEOS (15.4 mL) and TPAOH (16.5 mL) were mixed and stirred at room temperature for 3 h, then deionized water (44 mL) and copper citrate (0.25 g, 0.7 mmol) were added, and stirred overnight at 35 °C. The molar composition of the formed gel is 1TEOS:0.27TPAOH:0.02CuO:37H 2 O, the gel was heated at 80°C for 4h to remove the ethanol generated. The mixture was then transferred to a lined polytetrafluoroethylene hydrothermal kettle, heated in an oven at 170°C for 72 hours, and after cooling to room temperature, the mixture was centrifuged, and the solid part was dried overnight at 100°C. Roasted for 6h, the obtained sample was named hier-Cu 50 -S-1, the molar ratio of Si / Cu in the catalyst is 50;
[0063] (2) Obtained hier-Cu 50 -S-1 catalyst sample impregnated in Fe(NO 3 ) 3 9H 2 O (0.56g, 1.4mmol) aqueous solution, aging for 24h, then the mixture was dried overnight at 100°C, and calcined at 540°C for...
Embodiment 3
[0067] Embodiment 3: Catalyst Cu 50 -Fe 50 Preparation of @hier-S-1-ImC
[0068] (1) TEOS (15.4 mL) and TPAOH (16.5 mL) were mixed and stirred at room temperature for 3 h, then deionized water (44 mL) and ferric citrate (0.3 g, 1.4 mmol) were added, and stirred overnight at 35 °C. The molar composition of the formed gel is 1TEOS:0.27TPAOH:0.01Fe 2 o 3 :37H 2 O, the gel was heated at 80°C for 4h to remove the ethanol generated. The mixture was then transferred to a lined polytetrafluoroethylene hydrothermal kettle, heated in an oven at 170°C for 72 hours, and after cooling to room temperature, the mixture was centrifuged, and the solid part was dried overnight at 100°C. Roasted for 6h, the obtained sample was named hier-Fe 50 -S-1, the molar ratio of Si / Fe in the catalyst is 50.
[0069] (2) obtained hier-Fe 50 -S-1 catalyst sample impregnated in Cu(NO 3 ) 3 ·3H 2 O (0.33g, 1.4mmol) aqueous solution, aging for 24h, then the mixture was dried overnight at 100°C, and c...
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