Ruthenium catalyst capable of efficiently catalyzing decomposing of formic acid for preparing hydrogen

A technology of catalytic decomposition, ruthenium catalyst, applied in physical/chemical process catalyst, organic compound/hydride/coordination complex catalyst, hydrogen and other directions, can solve the problem of low hydrogen conversion rate or high pressure, high reaction temperature, Toxic problems such as fuel cells, to achieve the effect of reducing conditions, simple preparation process, good activity and stability

Inactive Publication Date: 2014-09-03
ANHUI UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] CN103240108A discloses a molybdenum carbide catalyst for hydrogen production from formic acid. The optimal reaction temperature of the catalyst is 200°C. Although the cost of the catalyst is relatively low, the reaction temperature is high a

Method used

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  • Ruthenium catalyst capable of efficiently catalyzing decomposing of formic acid for preparing hydrogen
  • Ruthenium catalyst capable of efficiently catalyzing decomposing of formic acid for preparing hydrogen
  • Ruthenium catalyst capable of efficiently catalyzing decomposing of formic acid for preparing hydrogen

Examples

Experimental program
Comparison scheme
Effect test

Embodiment example 1

[0041] Embodiment case 1: the preparation of ruthenium catalyst.

[0042] Step 1) combine Pincer compound with HRuCl(PPh 3 ) 3 Mix in equal proportions and react at 65°C for 12 hours to obtain the catalytic precursor Ru1.

[0043] Step 2) Add alkali KOBu to the Ru1 prepared in step 1) in a moderate proportion t , react at room temperature for 2 hours, and the ruthenium catalyst Ru Cat. can be prepared.

[0044]

Embodiment example 2

[0045] Implementation Case 2: The process of catalyzing the decomposition of formic acid to prepare hydrogen.

[0046] Step 1) will 10 -3 The mmol ruthenium catalyst was dissolved in 5ml DMSO solvent, added to the reaction system equipped with formic acid solution, and reacted continuously under the temperature conditions of 20, 50, and 80°C respectively to obtain gas continuously.

[0047] Step 2) pass the prepared mixed gas into the KOH solution to remove CO 2 , the resulting gas is hydrogen.

Embodiment example 3

[0048] Implementation case 3: the influence of catalyst solvent on the generation of hydrogen from formic acid.

[0049] The catalyst obtained in embodiment case 1 can preferably CH 3 CN, DMF, thf, thf / H 2One of O and DMSO is used as a solvent. For this reason, various solvents are used to dissolve the catalyst and the experiment is carried out according to the implementation case 2 under the condition of 50 ° C. The TON value of the catalyst obtained through the experimental results is used as a reference standard to select the preferred solvent. The specific data is shown in the following table :

[0050] Table 1 is the TON of the catalyst under the conditions of 50 ℃ various solvents

[0051]

[0052] By comparing the data in the table, the TON value of the catalyst can reach 95,000 when DMSO is used as the solvent, so DMSO is preferred as the catalyst solvent.

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Abstract

The invention discloses a ruthenium catalyst capable of efficiently catalyzing decomposing of formic acid for preparing hydrogen, and belongs to the technical field of energy source catalysis materials and hydrogen preparation. The invention mainly relates to preparation of the efficient catalyst and the process of catalyzing decomposition of formic acid by applying the catalyst. An optimum catalyst turnover number (TON) is obtained by reasonably controlling the reaction temperature, catalyst solvents, additives and other factors in the decomposition process of formic acid. The catalyst has the TON value larger than 1.8 million under an optimum reaction condition. The catalyst is capable of catalyzing formic acid for preparing hydrogen under a normal-temperature condition, and obtained hydrogen is directly applicable to chemical synthesis, fuel cells, engines and the like.

Description

technical field [0001] The invention belongs to the technical fields of energy catalytic materials and hydrogen production, and relates to the preparation of a catalytic system derived from a metal ruthenium salt and a Pincer-like ligand complex, preferably the conditions for the catalyst to catalyze the dehydrogenation of formic acid to obtain hydrogen. Background technique [0002] As a highly chemically active and widely used substance, hydrogen occupies an important position in the fields of national production and scientific research. At the same time, with the excessive utilization of mineral energy such as oil, natural gas, and coal, hydrogen is regarded as an efficient and clean energy substitute. However, the utilization of hydrogen is currently facing three major problems: a large amount of cheap hydrogen production; safe and convenient storage and transportation; extensive and economical application forms, etc. [0003] In recent years, the rapid development of f...

Claims

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Application Information

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IPC IPC(8): B01J31/24C01B3/22
Inventor 潘成岭
Owner ANHUI UNIV OF SCI & TECH
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