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Preparation method and application of biomass charcoal assisted synthesis bifunctional catalyst

A dual-function catalyst, biomass carbon technology, applied in catalyst activation/preparation, physical/chemical process catalysts, molecular sieve catalysts, etc., can solve the problems of low catalyst selectivity, long-term storage of precious metal nanocatalysts, and complex preparation processes, etc. Achieve the effect of promoting sustainability and cost reduction, good isomer selectivity and stability, and simple synthesis steps

Active Publication Date: 2021-09-03
SICHUAN LUTIANHUA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Wide source of raw materials and simple synthesis steps can solve the problems of complex preparation process and long-term storage of noble metal nanocatalysts in the prior art
The raw materials involved are from a wide range of sources, and biochar is environmentally friendly, which can solve the problems of complex preparation process, low catalyst selectivity and long-term storage of noble metal nanocatalysts in the prior art

Method used

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  • Preparation method and application of biomass charcoal assisted synthesis bifunctional catalyst
  • Preparation method and application of biomass charcoal assisted synthesis bifunctional catalyst
  • Preparation method and application of biomass charcoal assisted synthesis bifunctional catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] First, use 1.0 mL of H with a concentration of 0.133 mol / L 2 PtCl 6 The solution was impregnated with 0.283 g of commercially available biomass capacitor carbon powder, maintained at room temperature for 24 h, dried, and calcined to obtain the metal@biomass carbon precursor (M@RS). M@RS was mixed with 0.25 g silica, 2.912 g pseudoboehmite, 6.28 g DPA·H 3 PO 4 Mixed and ground for 5 min, placed in a hydrothermal kettle for crystallization at 185 °C for 24 h, the reacted product was washed by centrifugation, dried at 80 °C and calcined at 600 °C for 5 h in an air atmosphere to obtain the final catalyst product. The samples prepared above were tested by plasma emission spectrometry (ICP), and the metal loading was determined to be 0.5 wt%. The obtained catalyst was named M@RS / S11.

Embodiment 2

[0036] First, use 1.0 mL of H with a concentration of 0.133 mol / L 2 PtCl 6The solution was impregnated with 0.283 g of commercially available coconut shell charcoal powder, maintained at room temperature for 24 h, dried, and calcined to obtain the metal@biomass charcoal precursor (M@CS). Mix M@CS with 0.25 g silica, 2.912 g pseudoboehmite, 6.28 g DPA·H 3 PO 4 Mixed and ground for 5 min, placed in a hydrothermal kettle for crystallization at 185 °C for 24 h, the reacted product was washed by centrifugation, dried at 80 °C and calcined at 600 °C for 5 h in an air atmosphere to obtain the final catalyst product. The samples prepared above were tested by plasma emission spectrometry (ICP), and the metal loading was determined to be 0.5 wt%. The obtained catalyst was named M@CS / S11.

Embodiment 3

[0038] First, use 1.0 mL of H with a concentration of 0.133 mol / L 2 PtCl 6 The solution was impregnated with 0.283 g of commercially available walnut shell carbon powder, maintained at room temperature for 24 h, dried, and calcined to obtain the metal@biomass carbon precursor (M@WS). M@WS was mixed with 0.25 g silica, 2.912 g pseudoboehmite, 6.28 g DPA·H 3 PO 4 Mixed and ground for 5 min, placed in a hydrothermal kettle for crystallization at 185 °C for 24 h, the reacted product was washed by centrifugation, dried at 80 °C and calcined at 600 °C for 5 h in an air atmosphere to obtain the final catalyst product. The samples prepared above were tested by plasma emission spectrometry (ICP), and the loading amount of metal was measured to be 0.5wt%. The obtained catalyst was named M@WS / S11.

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Abstract

The invention belongs to the technical field of molecular sieve catalysts, and discloses a preparation method and application of a biomass charcoal assisted synthesis bifunctional catalyst. According to the invention, metal nanoparticles are covered with a carbon layer, so that the metal-carrier interaction is enhanced, and the agglomeration sintering phenomenon of the noble metal nanoparticles is effectively relieved; in a hydroisomerization reaction of n-alkanes, compared with a catalyst obtained by a traditional hydrothermal post-impregnation method, the catalyst prepared by the method has better isomer selectivity and stability, wherein the highest isomer yield reaches 80%; and the bifunctional catalyst provided by the invention is simple in synthetic route, does not need to introduce a surfactant and any complex operation, and promotes the sustainability and low cost of the hydroisomerization catalyst.

Description

technical field [0001] The invention belongs to the technical field of molecular sieve catalysts, and in particular relates to a preparation method and application of a biochar-assisted synthesis bifunctional catalyst. Background technique [0002] Global warming, environmental pollution and the current energy shortage of fossil fuels may lead to serious ecological crisis. Conventional carbon materials produced from coal and petrochemicals are usually energy-intensive, often involving harsh synthesis conditions. There is an urgent need to develop effective methods to utilize renewable resources with high performance and limited environmental impact to produce biochar to replace conventional carbon materials. Biochar is a multifunctional material with rich surface functional groups and easy-to-adjust porosity, which is expected to become the most widely used auxiliary material in the field of modern energy storage and conversion. In the context of sustainable development, b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/85B01J35/00B01J37/02B01J37/08C07C5/27C07C9/16C07C9/22
CPCB01J29/85B01J37/0201B01J37/08C07C5/277B01J2229/18B01J35/396C07C9/16C07C9/22
Inventor 李久盛谭阳春廖廷君赵永清杜燕燕李勇朱德林傅文佳倪杰
Owner SICHUAN LUTIANHUA
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