Unlock instant, AI-driven research and patent intelligence for your innovation.

A catalyst and preparation method for high -temperature gasification of biomass low temperature and gasification

A low-temperature gasification, high-purity technology, used in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., can solve sintering deactivation, poor cycle performance, increase material Sorting and other issues to achieve the effect of preventing sintering, ensuring stability, and simplifying the preparation process

Active Publication Date: 2019-08-02
苏州允清环境能源科技有限公司
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the separate existence of nickel-based catalyst and calcium-based absorbent increases the difficulty of material separation, and both have the problems of sintering deactivation and poor cycle performance.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A catalyst and preparation method for high -temperature gasification of biomass low temperature and gasification
  • A catalyst and preparation method for high -temperature gasification of biomass low temperature and gasification
  • A catalyst and preparation method for high -temperature gasification of biomass low temperature and gasification

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) Preparation of precursor mixed solution

[0032] Weigh 4.362g of nickel nitrate hexahydrate crystals and 7.911g of calcium acetate powder, dissolve them in a certain amount of deionized water, and stir well and evenly.

[0033] (2) Freeze-drying of the mixed solution

[0034] Place the mixed solution obtained in step (1) in a refrigerator and freeze at -80°C for 6 hours, and then place the frozen sample in a vacuum freeze dryer at a temperature of -60°C and a pressure of 8.0Pa for 24 hours , forming a uniform solid powder.

[0035] (3) High temperature solid phase reaction

[0036] The dry powder obtained in step (2) was calcined in a muffle furnace for 1 hour. The calcination temperature is 800°C, and the heating rate is 10°C / min. The calcined product was ground into powder with an agate mortar.

[0037] (4) Atmosphere reduction and hydration reaction

[0038] The solid sample obtained in step (3) is placed in a tube furnace, and a reduction reaction is first...

Embodiment 2

[0042] (1) Preparation of precursor mixed solution

[0043]Weigh 4.362g of nickel nitrate hexahydrate crystals and 3.955g of calcium acetate powder, dissolve them in a certain amount of deionized water, and stir well and evenly.

[0044] (2) Freeze-drying of the mixed solution

[0045] Place the mixed solution obtained in step (1) in a refrigerator and freeze at -80°C for 6 hours, and then place the frozen sample in a vacuum freeze dryer at a temperature of -60°C and a pressure of 8.0Pa for 24 hours , forming a uniform solid powder.

[0046] (3) High temperature solid phase reaction

[0047] The dry powder obtained in step (2) was calcined in a muffle furnace for 1 hour. The calcination temperature is 800°C, and the heating rate is 10°C / min. The calcined product was ground into powder with an agate mortar.

[0048] (4) Atmosphere reduction and hydration reaction

[0049] The solid sample obtained in step (3) is placed in a tube furnace, and a reduction reaction is first ...

Embodiment 3

[0052] (1) Preparation of precursor mixed solution

[0053] Weigh 0.8724g of nickel nitrate hexahydrate crystals and 3.955g of calcium acetate powder, dissolve them in a certain amount of deionized water, and stir well and evenly.

[0054] (2) Freeze-drying of the mixed solution

[0055] The mixed solution obtained in step (1) was placed in a refrigerator and frozen at -80°C for 6 hours, and then the frozen sample was placed in a vacuum freeze dryer at a temperature of -60°C and a pressure of 8.0Pa, and dried for 24 hours. hours, a uniform solid powder was formed.

[0056] (3) High temperature solid phase reaction

[0057] The dry powder obtained in step (2) was calcined in a muffle furnace for 1 hour. The calcination temperature is 800°C, and the heating rate is 10°C / min. The calcined product was ground into powder with an agate mortar.

[0058] (4) Atmosphere reduction and hydration reaction

[0059] The solid sample obtained in step (3) is placed in a tube furnace, an...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
diameteraaaaaaaaaa
Login to View More

Abstract

A method for preparing a catalyst for low-temperature gasification of biomass to produce high-purity hydrogen. Dissolve weighed soluble calcium salts and nickel salts in deionized water, stir thoroughly, and place the resulting mixed solution in a refrigerator to pre-freeze. Until the solution is completely frozen, after freezing, the sample is placed in a vacuum freeze dryer and dried at low temperature to form a uniform solid powder, which is then calcined in a muffle furnace. After calcination, the product is ground into powder, and then placed in a tube furnace. Reduction reaction: At a certain temperature, a certain volume fraction of hydrogen is introduced until nickel oxide is completely reduced to elemental nickel; then hydration reaction is carried out: water vapor is introduced to completely convert calcium oxide into calcium hydroxide. The catalyst of the invention is suitable for pyrolysis and gasification of biomass to produce hydrogen under low-temperature and normal-pressure conditions. After pyrolysis and gasification of biomass, it is mainly converted into small molecules of H. 2 , CO and a small amount of carbon deposits. Compared with traditional biomass gasification hydrogen production catalysts, it has lower operating temperature, higher catalytic activity, lower cost, and is easier to be used industrially.

Description

technical field [0001] The invention belongs to the technical field of new materials and their applications, and relates to a method for producing high-purity hydrogen from biomass at low temperature and normal pressure, in particular to a catalyst for producing high-purity hydrogen by low-temperature gasification of biomass and a preparation method thereof. Background technique [0002] Hydrogen production from biomass waste is a low-carbon, green and sustainable technology, which has great strategic significance for environmental protection and social development. The current common pyrolysis gasification process using biomass to produce hydrogen usually has a reaction temperature higher than 800 °C. And for biomass waste with high moisture content, it must be dried and pretreated before the pyrolysis gasification reaction can be effectively carried out. In addition, the hydrogen produced by this type of process will be mixed with a relatively high concentration of CO or C...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/78B01J35/10C01B3/02
CPCC01B3/02B01J23/78C01B2203/0277B01J35/60
Inventor 赵明崔晓敏王凡
Owner 苏州允清环境能源科技有限公司