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Catalyst for hydrogen production by water-phase reforming of biomass depolymerization product and preparation method thereof

A water-phase reforming technology for hydrogen production and depolymerization products, which can be used in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., and can solve the problems of poor stability and high reactivity. problem, to achieve the effect of low synthesis temperature, simple preparation process and improved stability

Active Publication Date: 2015-06-17
TIANJIN UNIV
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems in the prior art, the present invention provides a catalyst for hydrogen production by aqueous phase reforming of biomass depolymerization products and its preparation method, which solves the problems of high methanation reaction activity and poor stability of Ni-based catalysts in the prior art

Method used

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  • Catalyst for hydrogen production by water-phase reforming of biomass depolymerization product and preparation method thereof
  • Catalyst for hydrogen production by water-phase reforming of biomass depolymerization product and preparation method thereof
  • Catalyst for hydrogen production by water-phase reforming of biomass depolymerization product and preparation method thereof

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preparation example Construction

[0025] The preparation method of the biomass depolymerization product aqueous phase reforming hydrogen production catalyst of the present invention, the method comprises the following steps:

[0026] (1) Weigh Ni(NO 3 ) 2 ·6H 2 O2~5g, Fe(NO 3 ) 3 9H 2 O12~18g, Co(NO 3 ) 2 ·6H 2 O0.2~1.5g, citric acid 8~12g, under the condition of magnetic stirring, dissolve it in 30mL deionized water successively, obtain a kind of dark brown solution;

[0027] (2) Put the dark brown solution of (1) in an oil bath and heat up to 60°C-80°C, adjust the pH value of the reaction solution to 8-10 with ammonia water by adding drop by drop, and continue stirring at constant temperature for 5-80°C. 8h obtains viscous solution;

[0028] (3) Put the viscous solution obtained in (2) in an oven, and bake at 110°C for 12h to 24h to obtain a yellow-brown solid;

[0029] (4) Put the yellow-brown solid obtained in (3) in a muffle furnace, and roast it at 300-500°C for 3-5 hours to obtain a coral-like...

Embodiment

[0031] Weigh a certain amount of Ni(NO 3 ) 2 ·6H 2 O, Fe(NO 3 ) 3 9H 2 O, Co(NO 3 ) 2 ·6H 2 O and citric acid were dissolved in 30 mL of deionized water, the molar ratio of citric acid: (Ni+Fe+Co) was 1:1, and the dosage of each component was shown in Table 1. Stir the mixture in an oil bath at 60°C, add ammonia water drop by drop to adjust the pH value to 8, continue stirring at a constant temperature for 6 hours, then dry at 110°C for 12 hours, roast in a muffle furnace at 400°C for 3 hours, grind, press flakes, pulverized, and passed through 20-40 mesh sieves to obtain different Ni / Fe / Co catalysts.

[0032] Table 1 Ni / Fe / Co / citric acid dosage of different catalysts

[0033]

[0034] Depend on figure 1 The XRD spectrogram can be obtained, in the Ni / Fe / Co multi-metal composite catalyst prepared under this condition, Ni and Fe are NiFe 2 o 4 The alloy form existed in the catalyst, and no characteristic diffraction peaks of Co were found, indicating that Co was h...

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Abstract

The invention discloses a catalyst for hydrogen production by water-phase reforming of a biomass depolymerization product and a preparation method thereof. According to the method, citric acid is introduced as a dispersant of a catalyst metal active component, low-price Ni is adopted as a main metal active component, and Fe and Co are doped for catalyst modification. By a one-step method, the multiple metal active components-containing catalyst for hydrogen production by water-phase reforming of a biomass depolymerization product is synthesized. The invention has the following effects: the preparation method of the catalyst is simple, requires low cost and is convenient to operate; and metals Ni and Fe in the catalyst exist in the form of a NiFe2O4 alloy; the metal Co is highly dispersed; in comparison with a commonly-used Raney Ni catalyst, the catalyst provided by the invention is characterized in that hydrogen production speed and conversion rate from glycol to a gas product can be respectively raised by 21% and 23%, and selectivity of a reaction by-product alkane is reduced by 3%. Stability of the catalyst is improved. After 40h, 89% of catalytic activity still remains. Catalytic activity of the catalyst is 40% higher than that of the Raney Ni catalyst under the same conditions.

Description

technical field [0001] The invention relates to the field of hydrogen production from biomass, and specifically includes a Ni / Fe / Co multi-metal active component catalyst and a preparation method thereof. Background technique [0002] The depletion of non-renewable resources such as fossil fuels and the environmental pollution caused by them have made the research on renewable clean energy a hot topic. Among them, hydrogen energy has become the most promising due to its advantages of cleanliness, high efficiency, safety, wide sources and uses. One of the promising alternative energy sources. Due to the simple reaction process of the aqueous phase reforming hydrogen production method, H can be obtained in one step through a low-temperature and low-pressure process. 2 , has received widespread attention in recent years, and the research hotspots of this reaction focus on the development and improvement of efficient and cheap catalysts. [0003] At present, catalysts for hydro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/755C01B3/32
Inventor 陈冠益李婉晴颜蓓蓓马文超潘冬晖陈鸿
Owner TIANJIN UNIV
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