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Catalyst for reversible hydrogen storing and releasing by organic liquid hydride and its preparation

A technology of organic liquids and hydrides, applied in physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve problems such as difficult large-scale industrial applications, low economic benefits, high cost, etc., to achieve The effects of high activity, great practical application significance, and great theoretical research value

Active Publication Date: 2005-02-23
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In catalytic hydrogenation and dehydrogenation reactions, noble metals are commonly used as catalysts, especially Pt, Pd, and Rh have good hydrogenation and dehydrogenation performance, but their cost is expensive, the economic benefit is not high, and it is difficult for large-scale industrial application

Method used

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  • Catalyst for reversible hydrogen storing and releasing by organic liquid hydride and its preparation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Take 1.5g Ni(NO 3 ) 2 ·6H 2 O and 0.6812g (NH 4 ) 2 HPO 4 Dissolve in 12g of distilled water, add a few drops of HNO 3 Allow the precipitate to dissolve, then add 2.2205 g TiO 2 , impregnated at room temperature for at least 8 hours, dried at 100-120° C., and calcined at 500° C. for 6 hours to obtain a catalyst precursor. The pre-calcined precursor sample was fed with 10% hydrogen containing H 2 / N 2 The mixed gas is subjected to temperature-programmed reduction, the gas flow rate is 30-100ml / min, the heating rate is 3°C / min, the temperature is raised to 700-800°C, and the temperature is kept at this temperature for 4 hours, and then it is lowered to room temperature. 2 Medium passivation for 1h. The prepared catalyst is numbered as sample A. Its crystal phase structure XRD pattern is shown in figure 1 .

Embodiment 2

[0020] Take 1.8g Fe(NO 3 ) 3 9H 2 O and 0.5892g (NH 4 ) 2 HPO 4 Dissolve in 14g of distilled water, add a few drops of HNO 3 Allow the precipitate to dissolve, then add 1.8295 g TiO 2 , impregnated at room temperature for 10 h, dried at 100-120° C., and calcined at 500° C. for 6 h to obtain a catalyst precursor. The pre-calcined precursor sample was fed with 10% hydrogen containing H 2 / N 2 The mixed gas is subjected to temperature-programmed reduction, the gas flow rate is 30-100ml / min, the heating rate is 3°C / min, the temperature is raised to 700-800°C, and the temperature is kept at this temperature for 4 hours, and then it is lowered to room temperature. 2 Medium passivation for 1h. The prepared catalyst is coded as sample B.

Embodiment 3

[0022] Take 1.5g Co(CH 3 CO 2 ) 3 4H 2 O and 0.7949g (NH 4 ) 2 HPO 4 Dissolve in 12g of distilled water, add a few drops of HNO 3 Allow the precipitate to dissolve, then add 2.6012g TiO 2 , impregnated at room temperature for 10 h, dried at 100-120° C., and calcined at 500° C. for 6 h to obtain a catalyst precursor. The pre-calcined precursor sample was fed with 10% hydrogen containing H 2 / N 2 The mixed gas is subjected to temperature-programmed reduction, the gas flow rate is 30-100ml / min, the heating rate is 3°C / min, the temperature is raised to 700-800°C, and the temperature is kept at this temperature for 4 hours, and then it is lowered to room temperature. 2 Medium passivation for 1h. The prepared catalyst is coded as sample C.

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Abstract

A catalyst for the reversable accumulation and release of H2 in liquid-phase organic hydride contains M chosen from Ni, Fe, Co, Mo and W, P, Ti and O. It is prepared through immersing TiO2 in the mixture containing the soluble salt of active elements, drying, calcining, reducing in the mixture of H2 and N2, and passivating by N2.

Description

(1) Technical field [0001] The invention relates to a catalyst for reversible storage and release of liquid organic hydrides and a preparation method thereof, which simultaneously has high-efficiency hydrogenation and dehydrogenation performances. (2) Background technology [0002] Hydrogen energy is a new energy source that is abundant, clean and efficient. It has been reported in the literature that comparing the comprehensive benefits of different energy sources, hydrogen is 1, natural gas is 0.6, and oil and synthetic natural gas is 0.5. Combining the economic costs and environmental protection costs of various energy sources, it can be determined that hydrogen energy has the best fuel economy. Since the 1990s, with the research and development of hydrogen energy, hydrogen energy storage technology has also received great attention at home and abroad. Although the traditional metal hydride hydrogen storage and high-pressure compression hydrogen storage technologies are ...

Claims

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Application Information

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IPC IPC(8): B01J27/185B01J27/199
Inventor 徐南平陈长林李冬燕
Owner NANJING UNIV OF TECH
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