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High-dispersion dual-functional catalyst for hydrogenating and deoxidizing phenol and preparation method of catalyst

A dual-function catalyst and hydrodeoxygenation technology, which is applied in hydrogenation preparation, molecular sieve catalyst, carbon-based compound preparation, etc., can solve problems such as uneven distribution of functional groups, irregular material channels, uneven metal dispersion, etc., and achieve uniform distribution of functional groups , low cost, uniform distribution of active components

Inactive Publication Date: 2012-10-03
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented technology describes how it works with certain types of materials called porous crystal molecules (PMCs). These POMCs have tiny holes or cavities inside them where they hold small amounts of atoms like oxygen gas at high pressure. They act as support for these particles when placed together under specific circumstances such as heat or chemical vapor deposition. By allowing water from biomass oil through this hole structure, alcohol compounds may break down while producing benzene products. Additionally, some researchers found that adding different metals could increase production rates without increasing costs. Overall, this new type of material made possible better ways to transform harmful waste plumes into useful ones.

Problems solved by technology

This patents discusses different methods for improving the efficiency and quality of fossile resources like coal, natural gas, hydrogen, electricity, and nuclear energy through efficient transformation processes involving thermochemistry. However, current techniques involve expensive equipment and hazardous waste disposals, leading to concerns over potential health risks associated with pollution caused by volatile metabolites released during pyrochemical decomposition. To address this problem, researchers propose novel compositions containing specific types of molecules called phenylic chlorine reserves (PCA) that could potentially replace petroleum based products without causing negative effects upon our planet’s ecosystem.

Method used

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  • High-dispersion dual-functional catalyst for hydrogenating and deoxidizing phenol and preparation method of catalyst
  • High-dispersion dual-functional catalyst for hydrogenating and deoxidizing phenol and preparation method of catalyst
  • High-dispersion dual-functional catalyst for hydrogenating and deoxidizing phenol and preparation method of catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] 4.00 g (0.69 mmol) of Pluronic P123 was dissolved in 150 mL of 0.03 mol / L HCl solution at room temperature, heated to 40 °C with stirring, and then tetraethylorthosilicate TEOS (9.00 g, 43.20 mmol) was added. TEOS was prehydrolyzed for 2 hours and then 143 μL (0.7652 mmol) of mercaptopropyltrimethoxysilane (MPTMS) and 0.0299 g (0.1530 mmol) of chloroplatinic acid (H 2 PtCl 60.01 g Pt / mL solution) and 1.2605 g (6.171 mmol) of aluminum isopropoxide (AIP). The resulting mixture was stirred at 40 °C for 24 h and then left to age at 100 °C for 24 h. The obtained solid material was filtered, dried at 100 °C for 8 h, and finally calcined in an air atmosphere in a muffle furnace, heated to 500 °C at a heating rate of 2 °C / min, then kept at 500 °C for 6 h, and cooled to room temperature to obtain a solid. Metal active and acidic bifunctional catalyst 1%Pt-(SH) / Al-SBA-15(7).

[0033] The activity evaluation reaction is to dissolve 1.1764 g (0.0125 mol) phenol in 25.0 mL of dic...

Embodiment 2

[0035] The catalyst was prepared according to the method of Example 1 to obtain a 1% Pt-(SH) / Al-SBA-15(7) catalyst. The other activity evaluation conditions were the same as in Example 1 except for the solvent. Take water, ethanol and toluene as solvent to do three groups of reactions respectively, and the results are shown in Table 1.

Embodiment 3

[0037] The catalyst was prepared according to the method of Example 1 to obtain a 1% Pt-(SH) / Al-SBA-15(7) catalyst. Three groups of reactions were performed under the conditions of reaction temperatures of 30°C, 50°C and 100°C, respectively, and other activity evaluation conditions were the same as those in Example 1 except for the reaction temperature conditions. The results are shown in Table 2 (for the convenience of comparison, the reaction at 180° C. is also listed in Table 2).

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Abstract

The invention relates to the technology of a catalyst for preparing cyclohexane from phenol, aiming at providing a high-dispersion dual-functional catalyst for hydrogenating and deoxidizing phenol and the preparation method of the catalyst. The catalyst is prepared by the following steps: loading active metal Pt on Al-modified ordered mesoporous molecular sieve Al-SBA-15 (x) by a complexing agent trimethoxysilylpropanethiol through an in-situ synthesis method, and is shown in a formula 1% Pt-(SH)/ Al-SBA-15(x), wherein 1% represents the mass fraction of Pt in the catalyst, and x represents the molar ratio of silicon and aluminum in Al-SAB-15 and is 7-300. The catalyst prepared by the preparation method is used for improving the quality of phenolic compounds in a biological oil system and is beneficial to conversion of the phenolic compounds which are unstable, corrosive and hard to burn in the biological oil into hydrocarbon which is stable and easy to burn, thus the conversion rate of phenol and the selectivity of alkane can be improved. The conversion rate of the phenol hydrogenating and deoxidizing reaction can reach 100.0% under the optimum condition, and the selectivity of cyclohexane can reach 99.0%. The preparation method of the catalyst is simple to operate, integrates with a plurality of steps of operation, and does not need extra reduction activation treatment.

Description

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Claims

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Application Information

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Owner ZHEJIANG UNIV
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