Hydroxyapatite as well as preparation method and application thereof in dark fermentation hydrogen production

A hydroxyapatite and dark fermentation technology, which is applied in the field of hydroxyapatite and its preparation, can solve the problems of single promotion effect and poor hydrogen production effect, and achieves the advantages of improving activity, improving hydrogen production performance, and optimizing microbial community structure. Effect

Pending Publication Date: 2022-04-29
QILU UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ca only 2+ , the promotion effect is single, and the hydrogen production effect is poor

Method used

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  • Hydroxyapatite as well as preparation method and application thereof in dark fermentation hydrogen production
  • Hydroxyapatite as well as preparation method and application thereof in dark fermentation hydrogen production
  • Hydroxyapatite as well as preparation method and application thereof in dark fermentation hydrogen production

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] The preparation of hydroxyapatite comprises the following steps:

[0047] (1) At room temperature (25° C.) and under magnetic stirring, drop the diammonium hydrogen phosphate solution into the calcium nitrate tetrahydrate solution (Ca:P molar ratio=1.67) by titration, and the titration time is 20 min; Ca(NO 3 ) 2 4H 2 O solution concentration is 1g / L; (NH 4 ) 2 HPO 4 The solution concentration is 0.6g / L.

[0048] (2) The resulting mixed solution was kept at room temperature (25° C.) under magnetic stirring, and ammonia solution was added to keep the pH of the solution at 12.

[0049] (3) Continue stirring and reacting at 90° C. for 3 hours. After the reaction is complete, pour it into a beaker to cool, suction filter, and dry.

[0050] (4) Grinding the dried sample obtained in the above steps; sintering at 900° C. for 3 hours, and continuing drying for 24 hours to finally obtain hydroxyapatite.

[0051] Depend on figure 1 The X-ray diffraction pattern of hydrox...

Embodiment 2

[0067] (1) The preparation of hydroxyapatite comprises the following steps:

[0068] (1) At room temperature (25° C.) and under magnetic stirring, drop the diammonium hydrogen phosphate solution into the calcium nitrate tetrahydrate solution (Ca:P molar ratio=1.67) by titration, and the titration time is 20 min; Ca(NO3) 2 4H 2 O solution concentration is 2g / L; (NH 4 ) 2 HPO 4 The concentration is 1.2g / L.

[0069] (2) The obtained mixed solution is at room temperature (25° C.) under magnetic stirring, and ammonia solution is added to keep the pH of the solution at 12;

[0070] (3) Continue stirring and reacting at 90° C. for 3 hours. After the reaction is complete, pour it into a beaker to cool, suction filter, and dry.

[0071] (4) Grinding the dried sample obtained in the above steps; sintering at 900° C. for 3 hours, and continuing to dry for 24 hours to finally obtain hydroxyapatite (HA).

[0072] The HA obtained in Example 2 was subjected to elemental analysis by ED...

Embodiment 3

[0076] (1) Preparation of hydroxyapatite:

[0077] (1) At room temperature (25°C) and under magnetic stirring, drop diammonium hydrogen phosphate solution into calcium nitrate tetrahydrate solution by titration, and the titration time is 20min; Ca(NO 3 ) 2 4H 2 O solution concentration is 0.5g / L; (NH 4 ) 2 HPO 4 The concentration is 0.3g / L.

[0078] (2) The resulting mixed solution was kept at room temperature (25° C.) under magnetic stirring, and ammonia solution was added to keep the pH of the solution at 12.

[0079] (3) Continue stirring and reacting at 90° C. for 3 hours. After the reaction is complete, pour it into a beaker to cool, suction filter, and dry.

[0080] (4) Grinding the dried sample obtained in the above steps; sintering at 900° C. for 3 hours, and continuing to dry for 24 hours to finally obtain hydroxyapatite (HA).

[0081] Elemental analysis of HA (Example 3) was performed by EDS. The results showed that the atomic percentages of O, Ca and P were ...

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Abstract

The invention provides hydroxyapatite and a preparation method thereof, and new application of the hydroxyapatite in dark fermentation hydrogen production. Hydroxyapatite is added into a dark fermentation hydrogen production system, so that the H2 yield is increased. By adopting a calcining means, the problems of large particle size, non-uniformity and agglomeration in the traditional preparation method can be effectively avoided; the obtained hydroxyapatite particles have high biological activity and good application prospects. The hydroxyapatite is applied to the dark fermentation hydrogen production process, so that the defects of low microorganism quantity, low enrichment capacity, insufficient trace elements, poor enzyme activity and the like in the fermentation process can be overcome; the hydrogen yield of a dark fermentation system is improved by enriching anaerobic fermentation bacteria, promoting the formation of a biological membrane, providing necessary elements and excellent places for the growth and reproduction of microorganisms and the like.

Description

technical field [0001] The invention belongs to the field of bionic material synthesis and clean energy production, and relates to a hydroxyapatite, its preparation method and its application in dark fermentation hydrogen production. [0002] technical background [0003] Energy is the foundation of social progress and human survival. The limitations of fossil energy and the environmental problems associated with fossil energy combustion (such as solid waste, kitchen waste, poultry manure, agricultural solid waste and organic wastewater, etc.) have prompted people to For the use of biofuels, such as biohydrogen (BioH 2 ) and ethanol (EtOH) are of growing interest as alternative energy sources for transportation. Air pollution, ocean acidification, and global warming all seriously threaten the normal life of human beings and ultimately affect human health. The ever-increasing energy demand, the depletion of fossil energy and the deterioration of the living environment force ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P3/00C12N1/20C01B25/32C12R1/01
CPCC12P3/00C12N1/20C01B25/325C01P2006/12C01P2006/16C01P2006/14C01P2002/72C01P2006/17
Inventor 臧立华莫号娥王璐张金龙董维芳周茂娟
Owner QILU UNIV OF TECH
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