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A one-pot method for converting cellulose to bioethanol

A technology of bioethanol and cellulose, applied in chemical instruments and methods, preparation of organic compounds, chemical/physical processes, etc., can solve problems such as difficult operation, cumbersome, complicated purification and separation processes, and reduce raw material costs and process Simple, Wide-Source Effects

Active Publication Date: 2021-02-19
EAST CHINA NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the two-step process of cellulose involves a relatively complicated purification and separation process, which is cumbersome and difficult to operate.

Method used

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  • A one-pot method for converting cellulose to bioethanol
  • A one-pot method for converting cellulose to bioethanol
  • A one-pot method for converting cellulose to bioethanol

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) A Cu-based catalyst was synthesized by a two-step method, and the Cu-based catalyst was Pt-Co-Cu / SiO 2 ; The specific method is:

[0030] Step 1.1, weigh 1.2g copper nitrate hexahydrate (Cu(NO 3 ) 2 .3H 2 O), 0.2g cobalt nitrate hexahydrate (Co(NO 3 ) 2 .3H 2 O) being dissolved in 200ml concentration is in the urea solution of 1mol / L; Then add 1g nanometer SiO 2 , after hydrothermal reaction for 3 hours, calcined at 450°C for 2 hours to obtain the calcined product.

[0031] Step 1.2, put the calcined product in a small beaker, add 1ml of H with a concentration of 0.01g / ml 2 PtCl 6 solution. After stirring until dry, place in a 90°C oven for 12 hours.

[0032] Step 1.3, take out the product from the oven, put it into a tubular calciner, reduce it in a hydrogen atmosphere at a temperature of 450°C for 3 hours, cool it down to room temperature, and age it with nitrogen containing 5% air for 12 hours to obtain the catalyst Pt-Co-Cu / SiO 2 .

[0033] (2) Pre...

Embodiment 2

[0041] (1) Synthesis of W-based catalyst by impregnation method, W-based catalyst is WO 3 / C, the specific method is as follows:

[0042]Step 1.1, weigh 0.5g of ammonium tungstate into a small beaker, add 1g of activated carbon powder, stir until dry, then dry in an oven at 80°C.

[0043] Step 1.2, put the dried mixture of ammonium tungstate and activated carbon powder into a tubular calciner at 500°C, calcinate in a nitrogen atmosphere for 2 hours, and then reduce in a hydrogen atmosphere for 2 hours.

[0044] Step 1.3, after the calcined mixture drops to room temperature, it is aged for 12 hours with nitrogen containing 5% air, and the catalyst obtained is WO 3 / C.

[0045] (2) A Cu-based catalyst was synthesized by a two-step method, and the Cu-based catalyst was Ru-Co-Cu / SiO 2 , the specific method is:

[0046] Step 2.1, weigh 1.2g copper nitrate hexahydrate (Cu(NO 3 ) 2 .3H 2 O), 0.2g cobalt nitrate hexahydrate (Co(NO 3 ) 2 .3H 2 O) be dissolved in 200ml concent...

Embodiment 3

[0057] (1) Synthesis of W-based catalyst by impregnation method, W-based catalyst is W 2 C / mesoporous carbon, the specific method is:

[0058] Step 1.1, weigh 0.5g of ammonium tungstate and put it into a beaker, add 1g of mesoporous carbon, stir until dry, then dry in an oven at 80°C to obtain a mixture of ammonium tungstate and mesoporous carbon after drying.

[0059] Step 1.2, put the dried mixture of ammonium tungstate and mesoporous carbon into a 500°C tubular calciner, calcinate for 2 hours in a nitrogen atmosphere, and then reduce it for 1 hour at a temperature of 800°C in a hydrogen atmosphere to obtain a reduced product .

[0060] Step 1.3, after the reduced product has dropped to room temperature, it is aged with nitrogen containing 5% air for 12 hours to obtain the catalyst W 2 C / mesoporous carbon.

[0061] (2) A Cu-based catalyst was synthesized by a two-step method, and the Cu-based catalyst was Pd-Co-Cu / SiO 2 , the specific method is:

[0062] Step 2.1, weig...

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Abstract

The invention discloses a method for converting cellulose into bioethanol in a one-pot method. Raw material cellulose, W-based catalyst, Cu-based catalyst and solvent are added to a reaction kettle, and the mass ratio of the W-based catalyst to the Cu-based catalyst is: 5:1-1:100, the mass ratio of the raw material cellulose to the W-based catalyst is 1000:1-1:1; the mass ratio of the raw material cellulose to the solvent is 1:100-1:1. The present invention uses cellulose as a raw material, uses a mixed W-based catalyst that selectively breaks C-C bonds and a Cu-based catalyst that selectively breaks C-O bonds and hydrogenates as a catalyst system. In a reaction kettle, a pot The method obtains high-yield ethanol, the process is simple, and it is easy to scale up, and the bioethanol product obtained by the method of the present invention can be further purified by a simple distillation method.

Description

technical field [0001] The invention relates to the field of bioethanol preparation, in particular to a method for converting cellulose into bioethanol in one pot. Background technique [0002] Traditional ethanol production methods include chemical synthesis and biological fermentation. Among them, chemical synthesis is to hydrate ethylene obtained from petroleum cracking with water to produce ethanol; biological fermentation is to use biological enzymes to enzymatically decompose sugars into ethanol. . Among these two traditional methods, the operation of biological fermentation method is relatively mild, but the speed of enzymatic hydrolysis is slower and the efficiency is lower. [0003] Cellulose is the natural renewable resource with the largest storage capacity in plants, and it is expected to become a substitute for fossil energy such as oil, natural gas, and coal in the future. Cellulose is connected by the unit structure of glucose. From the structure of cellulos...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C31/08C07C29/00B01J23/89B01J27/22
CPCB01J23/8926B01J27/22C07C29/00C07C31/08
Inventor 赵晨褚大旺孙豪
Owner EAST CHINA NORMAL UNIV
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