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Method for producing synthetic gas by reforming by-product glycerin vapor of biological diesel production

A technology of steam reforming and biodiesel, which is applied in the production of bulk chemicals, chemical instruments and methods, and inorganic chemistry. It can solve the problems of unfavorable development and utilization of precious metal catalysts, and achieve the effects of convenient operation, broad prospects, and low cost.

Inactive Publication Date: 2007-10-31
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the continuous expansion of biodiesel production, the production of its glycerol by-products is also increasing rapidly, but the use of noble metal catalysts will not be conducive to its large-scale development and utilization

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Preparation of Nickel-Based Catalysts

[0016] Preparation process: (1) preparing zirconium oxychloride solution with concentration of 1.0mol / L; (2) preparing cerium nitrate solution with concentration of 1.0mol / L; (3) measuring cerium nitrate according to Ce / Zr=1 / 1 solution and zirconium oxychloride solution, the preparation of Ce 3+ 、Zr 4+ A mixed solution with a total ion concentration of 1.0 mol / L; for the above three solutions, use ammonia water as a precipitant, and add it dropwise for precipitation and keep stirring to control the pH of the solution to 9.5-10.5. After the precipitation was complete, it was aged for 12 h, washed with deionized water until the pH was 7 and no Cl could be detected with silver nitrate -1 , dried at 120°C for 12h, and calcined at 600-800°C for 2-5h to obtain CeO 2 , ZrO 2 and CeO 2 -ZrO 2 Powder, specific surface area 20-80m 2 / g. Weigh three parts of nickel nitrate according to the mass content of Ni at 10% to 15%, and prepar...

Embodiment 2

[0019] Adopt the 15wt%Ni / CeO that makes by embodiment 1 method 2 Catalyst 200mg, using hydrogen volume content of 5% H 2 -N 2 The mixed gas is pre-reduced at 500°C for 2 hours, and the reaction space velocity is set at 15000 hours -1 , Glycerin aqueous solution steam water carbon ratio 3: 1, reaction temperature 500 ℃, other experimental conditions are the same as embodiment 1. The reaction result is as follows: the glycerol conversion rate is 98%, and the molar composition of the reaction product: H 2 : 56.8%, CO: 31.9%, CO 2 : 9.8%, CH 4 : 1.5%, H 2 / CO=1.78.

Embodiment 3

[0021] Adopt the 10wt%Ni / CeO that makes by embodiment 1 method 2 -ZrO 2 Catalyst, set reaction space velocity 5000h -1 , Glycerin aqueous solution steam water carbon ratio 4: 1, reaction temperature 500 ℃, the reduction of catalyst and other experimental conditions are the same as embodiment 2. The reaction result is as follows: glycerol conversion rate 100%, reaction product molar composition: H 2 : 62.7%, CO: 25.3%, CO 2 : 10.7%, CH 4 : 1.3%, H 2 / CO=2.48.

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Abstract

The invention discloses a preparing method of synthetic gas through reforming the by-product glycerin steam of biological diesel in the preparing technology of synthetic gas, which comprises the following steps: filling Ni / ZrO2 or Ni / CeO2 or Ni / CeO2-ZrO2 activator into reactor; setting the content of nickel at 10%-15%; adopting hydrogen gas and nitrogen gaseous mixture; proceeding reducing pre-treatment for the activator; leading glycerin water solution steam into the reactor with air speed at 5000-20000h-1 and ratio of water and carbon at 1:1-5:1; steam-reforming under normal pressure and with temperature at 300-600 deg. c; preparing the product. This invention possesses the advantages of simple craft course, low cost and wide prospect, which is fit for the requirement of green chemistry.

Description

technical field [0001] The invention relates to a method for preparing synthesis gas by steam reforming glycerin, a by-product of biodiesel production, and belongs to the synthesis gas preparation technology. Background technique [0002] Biodiesel is a mono-alkyl ester of long-chain fatty acids, which can be obtained by transesterifying methanol with renewable resources such as animal and vegetable oils. Compared with mineral diesel, it has less air pollutant emissions, good lubricity, and biodegradability when used. It is a new type of fuel that countries are competing to develop [1] . Glycerol by-products are produced during the production of biodiesel by transesterification, and the yield generally accounts for about 10 wt% of biodiesel production. The development and utilization of glycerin by-products can effectively reduce the production cost of biodiesel on the one hand [2] , so as to promote the promotion and use of biodiesel; on the other hand, it can fill the g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B3/38
CPCY02P20/52
Inventor 马新宾李水荣王晓东王皓王胜平
Owner TIANJIN UNIV
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