Catalyst for catalytic conversion of biological cellulose and preparation method and applications of catalyst

Abstract

The invention relates to a catalyst for catalytic conversion of biological cellulose. The catalyst is composed of active components, assistants and carries, the active components include copper oxide and / or nickel oxide, the assistants include alkaline earth oxides and / or transition metal oxides, and the carries are porous oxides. The invention further relates to a preparation method of the catalyst and a method for catalytic conversion of alcohol reforming coupling biological cellulose. The method for catalytic conversion of the alcohol reforming coupling biological cellulose has the advantages that reaction conditions are mild, external hydrogen is not needed to be fed, the conversion efficiency is high, and the like. The utilized catalyst has the advantages of being simple in synthesis, low in cost, high in catalytic conversion activity on alcohol reforming and biological cellulose and good in catalytic recycling stability.

Description

technical field

[0001] The invention belongs to the field of catalytic conversion of biomass cellulose, in particular, the invention relates to a method for coupling alcohol reforming with catalytic conversion of biomass cellulose and a catalyst preparation method for the catalytic conversion process. Background technique

[0002] Due to the extensive use of fossil fuels, human beings are facing a series of problems such as environment and energy. Biomass is a renewable energy source that can fix atmospheric CO through photosynthesis 2 , effectively reducing greenhouse gas emissions. In addition, due to the low content of sulfur and nitrogen in biomass, the environmental pollution caused during use is less than that of fossil fuels. Therefore, biomass conversion has very broad application prospects. Biomass cellulose is the most abundant biomass resource in nature. The world can biosynthesize more than 100 billion tons of renewable cellulose every year. Its large-scale use...

Examples

Embodiment 1

[0062] Catalyst preparation: according to mass ratio CuO / ZnO / Al 2 o 3 =10%:40%:50%, take corresponding amount of copper nitrate, aluminum nitrate, zinc nitrate, be dissolved in deionized water, form the solution that total metal ion concentration is 0.25mol / L. Weigh a certain amount of sodium carbonate powder and dissolve it in deionized water to form a sodium carbonate solution with a concentration of 0.25mol / L. Drop metal salt solution and sodium carbonate solution into deionized water at 60°C at the same time, stir vigorously while adding dropwise, keep the pH between 6 and 7, and age the resulting suspension at 60°C for 2 hours, filter, wash, and dry , and then calcined at 600° C. for 5 h to obtain a metal oxide catalyst.

[0063] Catalyst performance evaluation: in methanol medium, for CuO / ZnO / Al 2 o 3 The metal oxide catalysts were evaluated for activity. Add 0.25g catalyst, 0.5g microcrystalline cellulose, and 30mL methanol into a 100mL airtight autoclave, and use ...

Embodiment 2

[0065] Catalyst preparation: according to mass ratio CuO / MgO / ZrO 2 =30%:30%:40%, take corresponding amount of copper chloride, magnesium chloride, zirconium chloride, be dissolved in deionized water, form the solution that total metal ion concentration is 1mol / L. A certain amount of urea powder was weighed and dissolved in deionized water to form a urea solution with a concentration of 2 mol / L. Drop metal salt solution and urea solution into deionized water at 100°C at the same time, stir vigorously while adding dropwise, keep the pH between 7 and 8, and age the resulting suspension at 100°C for 1 hour, filter, wash, and dry. Then calcined at 400° C. for 10 h to obtain a metal oxide catalyst.

[0066] Catalyst performance evaluation: in methanol medium, for CuO / MgO / ZrO 2 The metal oxide catalysts were evaluated for activity. Add 0.25g catalyst, 2g lignin extract, and 30mL methanol into a 100mL airtight autoclave, and use N 2The air in the autoclave was replaced. The autoc...

Embodiment 3

[0068] Catalyst preparation: according to mass ratio CuO / MnO 2 / TiO 2 =60%:15%:25%, take corresponding amount of copper acetate, manganese acetate, titanium acetate, be dissolved in deionized water, form the solution that total metal ion concentration is 5mol / L. A certain amount of potassium carbonate powder was weighed and dissolved in deionized water to form a potassium carbonate solution with a concentration of 5 mol / L. Drop metal salt solution and potassium carbonate solution into deionized water at 60°C at the same time, stir vigorously while adding dropwise, keep the pH between 5 and 7, and age the resulting suspension at 60°C for 5 hours, filter, wash, and dry , and then calcined at 500° C. for 6 h to obtain a metal oxide catalyst.

[0069] Catalyst performance evaluation: in methanol medium, for CuO / MnO 2 / TiO 2 Catalysts were evaluated for activity. Add 0.5g of catalyst, 2.5g of hemicellulose extract, and 30mL of methanol into a 100mL closed autoclave, and use N ...

technical field

[0001] The invention belongs to the field of catalytic conversion of biomass cellulose, in particular, the invention relates to a method for coupling alcohol reforming with catalytic conversion of biomass cellulose and a catalyst preparation method for the catalytic conversion process. Background technique

[0002] Due to the extensive use of fossil fuels, human beings are facing a series of problems such as environment and energy. Biomass is a renewable energy source that can fix atmospheric CO through photosynthesis 2 , effectively reducing greenhouse gas emissions. In addition, due to the low content of sulfur and nitrogen in biomass, the environmental pollution caused during use is less than that of fossil fuels. Therefore, biomass conversion has very broad application prospects. Biomass cellulose is the most abundant biomass resource in nature. The world can biosynthesize more than 100 billion tons of renewable cellulose every year. Its large-scale use...

Examples

Embodiment 1

[0062] Catalyst preparation: according to mass ratio CuO / ZnO / Al 2 o 3 =10%:40%:50%, take corresponding amount of copper nitrate, aluminum nitrate, zinc nitrate, be dissolved in deionized water, form the solution that total metal ion concentration is 0.25mol / L. Weigh a certain amount of sodium carbonate powder and dissolve it in deionized water to form a sodium carbonate solution with a concentration of 0.25mol / L. Drop metal salt solution and sodium carbonate solution into deionized water at 60°C at the same time, stir vigorously while adding dropwise, keep the pH between 6 and 7, and age the resulting suspension at 60°C for 2 hours, filter, wash, and dry , and then calcined at 600° C. for 5 h to obtain a metal oxide catalyst.

[0063] Catalyst performance evaluation: in methanol medium, for CuO / ZnO / Al 2 o 3 The metal oxide catalysts were evaluated for activity. Add 0.25g catalyst, 0.5g microcrystalline cellulose, and 30mL methanol into a 100mL airtight autoclave, and use ...

Embodiment 2

[0065] Catalyst preparation: according to mass ratio CuO / MgO / ZrO 2 =30%:30%:40%, take corresponding amount of copper chloride, magnesium chloride, zirconium chloride, be dissolved in deionized water, form the solution that total metal ion concentration is 1mol / L. A certain amount of urea powder was weighed and dissolved in deionized water to form a urea solution with a concentration of 2 mol / L. Drop metal salt solution and urea solution into deionized water at 100°C at the same time, stir vigorously while adding dropwise, keep the pH between 7 and 8, and age the resulting suspension at 100°C for 1 hour, filter, wash, and dry. Then calcined at 400° C. for 10 h to obtain a metal oxide catalyst.

[0066] Catalyst performance evaluation: in methanol medium, for CuO / MgO / ZrO 2 The metal oxide catalysts were evaluated for activity. Add 0.25g catalyst, 2g lignin extract, and 30mL methanol into a 100mL airtight autoclave, and use N 2The air in the autoclave was replaced. The autoc...

Embodiment 3

[0068] Catalyst preparation: according to mass ratio CuO / MnO 2 / TiO 2 =60%:15%:25%, take corresponding amount of copper acetate, manganese acetate, titanium acetate, be dissolved in deionized water, form the solution that total metal ion concentration is 5mol / L. A certain amount of potassium carbonate powder was weighed and dissolved in deionized water to form a potassium carbonate solution with a concentration of 5 mol / L. Drop metal salt solution and potassium carbonate solution into deionized water at 60°C at the same time, stir vigorously while adding dropwise, keep the pH between 5 and 7, and age the resulting suspension at 60°C for 5 hours, filter, wash, and dry , and then calcined at 500° C. for 6 h to obtain a metal oxide catalyst.

[0069] Catalyst performance evaluation: in methanol medium, for CuO / MnO 2 / TiO 2 Catalysts were evaluated for activity. Add 0.5g of catalyst, 2.5g of hemicellulose extract, and 30mL of methanol into a 100mL closed autoclave, and use N ...

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