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Hydrotalcite-like type iron-promoted nickel-based catalyst for hydrogen preparation through autothermal reforming of acetic acid and preparation method

A nickel-based catalyst, autothermal reforming technology, applied in catalyst activation/preparation, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., can solve problems such as catalyst deactivation and achieve stable performance , Inhibit oxidation and ensure stable dispersion effect

Active Publication Date: 2017-10-24
CHENGDU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a structurally stable, sintering-resistant , Anti-coking, anti-oxidation, new catalyst with stable activity

Method used

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  • Hydrotalcite-like type iron-promoted nickel-based catalyst for hydrogen preparation through autothermal reforming of acetic acid and preparation method
  • Hydrotalcite-like type iron-promoted nickel-based catalyst for hydrogen preparation through autothermal reforming of acetic acid and preparation method

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0024] Weigh 29.969g Ni(NO 3 ) 2 ·6H 2 O, 122.632g Zn(NO 3 ) 2 ·6H 2 O and 64.432gAl(NO 3 ) 3 9H 2 O, add 687.0ml of deionized water to prepare solution #1; weigh 87.941g NaOH and 14.564g NaOH 2 CO 3 , adding 2336.0ml of deionized water to prepare solution #2; under the conditions of 78°C and pH=10.0±0.5, carry out co-precipitation reaction between solutions #1 and #2, and continue to stir and age for 18 hours; after aging, The mixed solution was filtered and washed three times, and the obtained precipitate was transferred to a vacuum drying oven, dried at 105°C for 12 hours, and then calcined at 700°C for 4 hours to obtain the CUT-ZNA catalyst. The molar composition of the catalyst is (ZnO) 2.4 (NiO) 0.6 (AlO 1.5 ) 1 , The weight percent composition is: nickel oxide 15.4%, zinc oxide 67.1%, aluminum oxide 17.5%.

[0025] The reactivity evaluation of autothermal reforming was carried out in a continuous flow fixed bed reactor. Grind, tablet, crush, and sieve the...

example 2

[0028] Weigh 29.386gNi(NO 3 ) 2 ·6H 2 O, 120.247gZn(NO 3 ) 2 ·6H 2 O, 50.543g Al(NO 3 ) 3 9H 2 O and 13.608gFe(NO 3 ) 3 9H 2 O, add 674.0ml of deionized water to make solution #1; weigh 86.231gNaOH and 14.281gNaOH 2 CO 3 , adding 2290.0ml of deionized water to prepare solution #2; the follow-up steps were the same as in Reference Example 1, and CUT-ZNA was obtained 0.8 f 0.2 catalyst. The molar composition of the catalyst is (ZnO) 2.4 (NiO) 0.6 (AlO 1.5 ) 0.8 (FeO 1.5 ) 0.2 , The weight percent composition is: 15.1% of nickel oxide, 65.8% of zinc oxide, 13.7% of aluminum oxide, and 5.4% of iron oxide.

[0029] The CUT-ZNA 0.8 f 0.2 The activity of the catalyst was tested by autothermal reforming of acetic acid, the reduction temperature was 700°C, the reaction conditions were 650°C, CH 3 COOH / H 2 O / O 2 / N 2 =1 / 4 / 0.28 / 3.9, normal pressure, space velocity 11250ml g -1 h -1 , The reaction time is 10h. The acetic acid conversion rate of the catalyst dr...

Embodiment 1

[0031] Weigh 28.553g Ni(NO 3 ) 2 ·6H 2 O, 116.839gZn (NO 3 ) 2 ·6H 2 O, 30.694g Al(NO 3 ) 3 9H 2 O and 33.055gFe(NO 3 ) 3 9H 2 O, add 655.0ml of deionized water to prepare solution #1; weigh 83.786g NaOH and 13.876g NaOH 2 CO 3 , adding 2226.0ml of deionized water to prepare solution #2; the follow-up steps are the same as those in Reference Example 1, and a precursor with a hydrotalcite-like structure as the main body and a small amount of zinc hydroxide phase is obtained, as shown in the attached figure 1 As shown, the zinc oxide-containing spinel phase (NiAl 2 o 4 / NiFe 2 o 4 / Fe 3 o 4 / ZnAl 2 o 4 ) Zn-Ni-Al-Fe-O composite oxide, as attached figure 2 As shown, that is, get CUT-ZNA 0.5 f 0.5 catalyst. The molar composition of the catalyst is (ZnO) 2.4 (NiO) 0.6 (AlO 1.5 ) 0.5 (FeO 1.5 ) 0.5 , The weight percent composition is: 14.7% of nickel oxide, 63.9% of zinc oxide, 8.3% of aluminum oxide, and 13.1% of iron oxide.

[0032] The CUT-ZNA 0.5 ...

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Abstract

The invention relates to a hydrotalcite-like type iron-promoted nickel-based catalyst for hydrogen preparation through autothermal reforming of acetic acid and a preparation method and provides a high-activity novel catalyst resisting oxidation, sintering and carbon deposition to solve the problem that existing catalysts are inactivated due to the structure change as well as oxidation and sintering of active components of the catalysts in the autothermal reforming process of acetic acid. The chemical component of the catalyst is (ZnO)a(NiO)b(AlO1.5)c(FeO1.5)d, wherein a ranges from 0.75 to 3.25, b ranges from 0.25 to 0.75, c ranges from 0 to 1.0 and d ranges from 0 to 1.0. The Zn-Al type carbonate hydrotalcite-like structure is prepared with a co-precipitation method to serve as a precursor, and an active component nickel and an auxiliary iron are introduced and enter the position of the hydrotalcite-like structure through isomorphous substitution of zinc for nickel and isomorphous substitution of aluminum for iron; a compound oxide obtained through sintering effectively inhibits possible migration, accumulation, oxidation and sintering of the active component nickel under the high-temperature reaction condition, and the activity and the stability of the catalyst are improved.

Description

technical field [0001] The invention relates to an iron-promoted nickel-based catalyst derived from a carbonate-type hydrotalcite-like structure for hydrogen production by autothermal reforming of acetic acid and a preparation method thereof, belonging to the field of hydrogen production by autothermal reforming of acetic acid. Background technique [0002] With the rapid development of society and economy, the demand for energy is also increasing, while fossil energy is decreasing day by day, and it is imminent to seek alternatives to fossil energy. As a clean and efficient new energy source, hydrogen has attracted extensive attention due to its high energy density per unit mass, high combustion calorific value, and wide application range. The traditional production method of hydrogen is obtained from fossil resources such as natural gas and coal, which often brings environmental pollution. Biomass is a clean and renewable resource and is relatively cheap. Therefore, hydro...

Claims

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Application Information

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IPC IPC(8): B01J23/80C01B3/32
CPCC01B3/326B01J23/005B01J23/80B01J37/03C01B2203/1076C01B2203/1058C01B2203/0244B01J35/394
Inventor 黄利宏杨浩李辉谷杨季龙王巧
Owner CHENGDU UNIVERSITY OF TECHNOLOGY
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