Method for dehydrogenating hydrazine hydrate by means of catalysis by aid of NiPdPt/porous CexCoyOz nanometer catalysts
A technology of catalyst catalytic hydration and nano-catalyst, applied in the field of chemical industry, can solve problems such as waste of hydrazine hydrate, and achieve the effect of simple operation and high activity
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Embodiment 1
[0021] Catalyst preparation process
[0022] Dissolve 0.8mmol cerium nitrate, 5.5mmol cobalt nitrate and 11mmol 2-methylimidazole in 200mL methanol to form a homogeneous solution, stir at 21°C for 19h, centrifuge to obtain Ce-Co-MOF, transfer Ce-Co-MOF to Tube furnace, calcination time 4.5h at 500℃, calcination atmosphere is 18%O 2 / N 2 , roasted to produce porous CexCoyOz, the prepared porous CexCoyOz was placed in a solution containing 1mmol nickel nitrate, 0.06mmol potassium chloropalladate and 0.03mmol chloroplatinic acid solution, and reduced with 0.03mol / L ammonia borane solution at 2°C for 8h , namely the prepared catalyst, denoted as NiPd 0.06 Pt 0.03 / Porous Ce 0.8 co 5.5 Oz nano-catalyst, airtight storage.
[0023] Dehydrogenation process
[0024] Put 50 mg of the above catalyst into a tubular reactor, then place the tubular reactor in a water bath to control the reaction temperature at 20°C, add dropwise 1 g of a mixture of hydrazine hydrate and sodium hydro...
Embodiment 2
[0026] Catalyst preparation process
[0027] Dissolve 2.4mmol cerium nitrate, 8.7mmol cobalt nitrate and 18mmol 2-methylimidazole in 200mL methanol to form a homogeneous solution, stir at 28°C for 14h, centrifuge to obtain Ce-Co-MOF, transfer Ce-Co-MOF to Tube furnace, calcination time 2.5h at 550℃, calcination atmosphere is 14%O 2 / N 2 , roasted to obtain porous CexCoyOz, the prepared porous CexCoyOz was placed in a solution containing 1mmol nickel nitrate, 0.2mmol potassium chloropalladate and 0.09mmol chloroplatinic acid, and reduced at -3°C using 0.08mol / L ammonia borane solution 4.5h, that is, the catalyst is prepared, which is recorded as NiPd 0.2 Pt 0.09 / Porous Ce 2.4 co 8.7 Oz nano-catalyst, airtight storage.
[0028] Dehydrogenation process
[0029] Put 50 mg of the above catalyst into a tubular reactor, then place the tubular reactor in a water bath to control the reaction temperature to 70°C, and add dropwise 3.5 g of a mixed solution of hydrazine hydrate a...
Embodiment 3
[0031] Catalyst preparation process
[0032] Dissolve 2 mmol cerium nitrate, 7 mmol cobalt nitrate and 16 mmol 2-methylimidazole in 200 mL methanol to form a homogeneous solution, stir at 24 °C for 18 h, centrifuge to obtain Ce-Co-MOF, transfer Ce-Co-MOF to a tube Furnace, firing time 3.4h at 520°C, firing atmosphere 15%O 2 / N 2 , roasted to produce porous CexCoyOz, the prepared porous CexCoyOz was placed in a solution containing 1mmol nickel nitrate, 0.1mmol potassium chloropalladate and 0.05mmol chloroplatinic acid solution, and reduced with 0.08mol / L ammonia borane solution at 1°C for 5h , namely the prepared catalyst, denoted as NiPd 0.1 Pt 0.05 / Porous Ce 2 co 7 Oz nano-catalyst, airtight storage.
[0033] Dehydrogenation process
[0034] Put 50 mg of the above catalyst into a tubular reactor, then place the tubular reactor in a water bath to control the reaction temperature to 35° C., dropwise add 3 g of a mixed solution of hydrazine hydrate and sodium hydroxide ...
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