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Linear-chain C5/C6 alkane catalyst prepared by sorbitol aqueous phase hydrogenation and preparation method thereof

A catalyst and a technology for sorbitol, which are applied to the production of straight-chain C5/C6 alkane catalysts by aqueous hydrogenation of sorbitol and the field of preparation thereof, can solve the problems of unstable catalyst performance and life, catalyst deactivation, and difficulty in industrial amplification, and the like, To achieve the effect of improving selectivity and activation capacity

Active Publication Date: 2016-02-03
GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to molecular sieves HZSM-5, MCM-41 and amorphous Al 2 o 3 -SiO 2 The carrier is hydrothermally unstable, and the carrier is hydrothermally eroded and structurally damaged, resulting in unstable catalyst performance and life, which is not easy for industrial scale-up; non-noble metal Ni is sensitive to acid in the solution, which easily leads to catalyst deactivation

Method used

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  • Linear-chain C5/C6 alkane catalyst prepared by sorbitol aqueous phase hydrogenation and preparation method thereof
  • Linear-chain C5/C6 alkane catalyst prepared by sorbitol aqueous phase hydrogenation and preparation method thereof
  • Linear-chain C5/C6 alkane catalyst prepared by sorbitol aqueous phase hydrogenation and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Weigh 100 grams of granular 40-60 mesh commercial activated carbon carrier and dry it at 200° C. for 12 hours, and set aside. Take 30 grams of dried activated carbon and put it into 60ml of 4.40% ammonium paramolybdate solution, soak it for 10 hours, and dry it at 100°C for 12 hours. The amount is 5%, that is, the catalyst carrier 5Mo / C containing a single metal molybdenum; then take out 15g of the catalyst carrier 5Mo / C, put it into 30ml of a 1.32% ruthenium trichloride solution, soak it for 12 hours, and dry it at 120°C for 10 hours After drying, the sample was placed in a muffle furnace and calcined at 400°C for 4 hours to obtain a 1Ru5Mo / C catalyst with 1% loaded ruthenium and 5% loaded molybdenum, and the resulting catalyst was designated as Cat1.

[0032] Weigh 4 grams of Cat1 and fill it into a continuous high-pressure fixed-bed reactor, reduce it online with hydrogen at 300°C for 6 hours, and react at a hydrogen pressure of 4.0MPa and a reaction temperature of 2...

Embodiment 2

[0034]Weigh 100 grams of granular 40-60 mesh commercial activated carbon carrier and dry it at 200° C. for 12 hours, and set aside. Get 30 grams of dried activated carbon and put it into 60ml of 4.40% ammonium paramolybdate and 1.32% ruthenium trichloride solution, impregnate for 10 hours, dry at 100°C for 12 hours, and place the dried sample in a muffle furnace for 400 ℃ roasting for 4 hours to obtain a 1Ru5Mo / C catalyst with 1% loaded ruthenium and 5% loaded molybdenum, and the obtained catalyst is designated as Cat2.

[0035] Weigh 4 grams of Cat2 and fill it into a continuous high-pressure fixed-bed reactor, reduce it online with hydrogen at 300°C for 6 hours, react at a hydrogen pressure of 4.0MPa and a reaction temperature of 280°C, a hydrogen flow rate of 150ml / min, and a sorbitol solution of 20wt%. The solution injection flow rate was 0.05ml / min.

Embodiment 3

[0037] Weigh 100 grams of granular 40-60 mesh commercial activated carbon carrier and dry it at 200° C. for 12 hours, and set aside. Take 30 grams of dried activated carbon and put it into 60ml of 1.32% ruthenium trichloride solution, soak it for 10 hours, and dry it at 100°C for 12 hours. The amount is 1%, that is, the catalyst carrier 1Ru / C containing a single metal ruthenium; then take out 15g of the catalyst carrier 1Ru / C, put it into 30ml of 4.40% ammonium paramolybdate solution, soak for 12 hours, and dry at 120°C for 10 hours After drying, the sample was placed in a muffle furnace and calcined at 400° C. for 4 hours to obtain a 1Ru5Mo / C catalyst with 1% loaded ruthenium and 5% loaded molybdenum, and the resulting catalyst was designated as Cat3.

[0038] Weigh 4 grams of Cat3 and fill it into a continuous high-pressure fixed-bed reactor, reduce it online with hydrogen at 300°C for 6 hours, and react at a hydrogen pressure of 4.0MPa and a reaction temperature of 280°C, w...

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Abstract

The invention relates to a preparation method of a linear-chain C5 / C6 alkane catalyst prepared by sorbitol aqueous phase hydrogenation. The method comprises the following steps: (1) selecting activated carbon as a catalyst carrier, and drying at the temperature of 100-200 DEG C; (2) adding the dried activated carbon into an ammonium paramolybdate aqueous solution, and drying to obtain a catalyst carrier precursor containing molybdenum; (3) calcining the catalyst carrier precursor containing molybdenum in a muffle furnace to obtain a catalyst carrier containing molybdenum; (4) adding a ruthenium trichloride solution into the catalyst carrier for soaking, and drying to obtain a catalyst carrier precursor containing ruthenium and molybdenum; (5) calcining the catalyst carrier precursor containing ruthenium and molybdenum to obtain an initial catalyst; and (6) performing hydrogen gas reduction on the initial catalyst at the temperature of 250-400 DEG C for 4-8h to obtain the sorbitol aqueous phase hydrogenation catalyst. According to the method, a step soaking method is adopted to inhibit carbon-carbon bond breakage and selectively break carbon-oxygen bonds, so that the selectivity and the excitation capacity of sorbitol hydrodeoxygenation reaction can be improved.

Description

technical field [0001] The invention belongs to the technical field of preparing fuel and chemicals by utilizing biomass and its derivatives, and in particular relates to a catalyst for preparing straight-chain C5 / C6 alkanes through aqueous phase hydrogenation of sorbitol and a preparation method thereof. Background technique [0002] Pentane and hexane (C 5 and C 6 ) as an important organic chemical raw material and solvent, widely used in medicine, chemical industry, polymer materials, rubber industry, electronics industry and food analysis and other industries, as foaming agent, solvent, extractant, coolant and cleaning agent, etc. C 5 -C 6 As a light hydrocarbon fuel, alkane has the characteristics of low cost, high calorific value, and easy storage and transportation; as a gasoline additive, it can be mixed into motor gasoline in a high proportion, and is suitable for any ordinary car or ethanol gasoline car, and is more efficient than traditional ethanol gasoline M...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/652B01J23/46C07C1/20C07C9/15
Inventor 王铁军仇松柏马隆龙张琦陈伦刚刘琪英翁育靖
Owner GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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