Catalyst for preparing C5 or C6 alkane from sugar or sugar alcohol via water-phase hydrogenolysis

A catalyst and sugar alcohol technology, applied in the field of catalysis, can solve the problems of poor catalyst stability and high C5/C6 alkane yield, and achieve the effects of good stability, high hydrogenolysis activity and high yield

Inactive Publication Date: 2015-09-09
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

[0004] The purpose of the present invention is aimed at the deficiencies in the prior art, and provides a kind of catalyst that is used for sugar or sugar alcohol water-phase hydrogenolysis to prepare C5 or C6 alkane, and this catalyst is good gac of hydrothermal stability, ZrO 2 、TiO 2 , Nb 2 o 5 One or two of them are used as the carrier, metal Ru is used as the active metal, and one of the oxides of Mo, Sn or Mn is added as an auxiliary agent to modify the metal Ru. The catalyst has good stability and is used for sugar / Sugar alcohol aqueous phase hydrogenolysis activity is high, and the yield of C5 / C6 alkanes obtained is high, which solves the problem of poor stability of silica-aluminum oxide or molecular sieve supported catalysts

Method used

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  • Catalyst for preparing C5 or C6 alkane from sugar or sugar alcohol via water-phase hydrogenolysis
  • Catalyst for preparing C5 or C6 alkane from sugar or sugar alcohol via water-phase hydrogenolysis
  • Catalyst for preparing C5 or C6 alkane from sugar or sugar alcohol via water-phase hydrogenolysis

Examples

Experimental program
Comparison scheme
Effect test

preparation Embodiment 1

[0019] Carrier Preparation Example 1: ZrO 2 Vector preparation

[0020] ZrO 2 The carrier preparation method is as follows: Weigh 20g of zirconium oxychloride solid and add 100mL of deionized water to stir until it is completely dissolved, then add dropwise an ammonia solution with a mass fraction of 17% while stirring to gradually form a white precipitate until the pH of the solution is about 10. Add ammonia water dropwise, then leave it to age for 12 hours, then filter, wash the filter cake with deionized water for 3 times, put it in a drying oven at 120°C to dry overnight, and finally roast it in a horse-boiling furnace at 500°C for 6 hours to obtain ZrO 2 carrier.

preparation Embodiment 2

[0021] Carrier Preparation Example 2: TiO 2 Preparation of vector

[0022] TiO 2 The carrier preparation method is as follows: adopt TiCl 4 Liquid-phase hydrolysis method, first 5g glacial acetic acid is dissolved in 200mL deionized water, then 20g titanium tetrachloride is added and stirred until completely dissolved, and the ammonia solution with a mass fraction of 17% is added dropwise while stirring to gradually generate a white precipitate until The pH value of the solution is about 10, and then it is left to age for 12 hours and then filtered. The filter cake is washed with deionized water for 3 times and then dried in a drying oven at 120°C overnight. Finally, TiO can be obtained after roasting at 500°C for 6 hours in a horse-boiling furnace. 2 carrier.

preparation Embodiment 3

[0023] Carrier Preparation Example 3: Nb 2 o 5 Preparation of vector

[0024] Nb 2 o 5 The carrier preparation method is as follows: Dissolve 20.4g ammonium niobium oxalate in 200mL deionized water to form a solution, then add dropwise an ammonia solution with a mass fraction of 17% while stirring to produce a white precipitate until the pH value of the solution is about 10, and then let it stand After aging for 12 hours, dry at 120°C for 12 hours in an oven, and finally bake at 500°C for 6 hours in a horse-boiling furnace to obtain Nb 2 O carrier.

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Abstract

The invention discloses a catalyst for preparing C5 or C6 alkane from sugar or sugar alcohol via water-phase hydrogenolysis, and an application of the catalyst. The catalyst takes one or two of active carbon, ZrO2, TiO2, and Nb2O5 as a carrier, and takes a metal of Ru as an active metal. An oxide of Mo, Sn, or Mn is taken as an auxiliary agent. The metal of Ru takes 0.5-10.0% by mass percentage of the carrier. The atom mol ratio of Ru and Mo, Sn, or Mn is in a range of 0.2:1.0-5:1.0. The catalyst has excellent stability, can continuously stably operate more than 500h in a trickle bed reactor, and can be used for water-phase hydrogenolysis of sugar/ sugar alcohol and is high in activity to obtain C5/C6 alkane with a high yield. The problem that silicon-aluminum oxide or a molecular sieve supported catalyst is relatively poor in stability is solved.

Description

Technical field: [0001] The invention relates to the field of catalysis, in particular to a catalyst for the aqueous phase hydrogenolysis of sugar or sugar alcohol to prepare C5 or C6 alkanes. Background technique: [0002] Agricultural and forestry biomass includes agricultural production wastes and residues, forest trees and forestry processing wastes, grasses and other plants, and is the most abundant renewable resource on earth. Its main carbon components include cellulose, hemicellulose and lignin Three parts, some also contain carbohydrates. Among them, cellulose, hemicellulose and starch components can obtain sugars (mainly glucose and xylose) or sugar alcohols (mainly sorbitol and xylitol) through hydrolysis and hydrogenation. These sugars / sugar alcohols are considered to be a new generation of biomass energy platform compounds, which can synthesize hydrogen, alkanes and chemicals through catalytic hydrodeoxygenation or aqueous phase reforming technology. Internati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/652B01J23/62B01J23/656C07C1/20C07C9/15C07C9/16C07C13/10C07C13/18
Inventor 陈伦刚马隆龙王铁军张琦定明月仇松柏
Owner GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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