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Nitrogen doped carbon material loaded catalyst

A nitrogen-doped carbon, catalyst technology, applied in catalyst carrier, physical/chemical process catalyst, organic chemistry and other directions, to achieve the effect of non-volatile, good activity and pollution avoidance

Inactive Publication Date: 2013-11-06
TSINGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method has no follow-up industrialization reports except literature reports.

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  • Nitrogen doped carbon material loaded catalyst
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  • Nitrogen doped carbon material loaded catalyst

Examples

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Effect test

specific example 1

[0052] Specific example 1: 0.35 wt% gold catalyst supported on nitrogen-doped activated carbon. Take 10g of ordinary coconut shell charcoal and wash the impurities with deionized water. The specific steps are: take 100ml of deionized water and soak the coconut shell charcoal at room temperature for 24 hours, then filter; repeat this 3 times. Then place the activated carbon at 120 ? Dry in an oven at C for 10 hours. Under the condition of 600 oC without air, 50ml / min of ammonia gas and 10ml / min of hydrogen gas (Beijing North Temperature Gas, high purity, ≥99.99%) were introduced for 5 hours, then gradually lowered to room temperature, and then the ammonia gas was turned off ( Beijing Lvling Gas, high purity, ≥99.99%) and hydrogen, at this time the nitrogen content of the activated carbon bulk phase can be increased from 0.25% to 1.80%. Take 0.035g chloroauric acid (HAuCl 4 ·H 2 O, Acros, ≥99.9%) was dissolved in 8.5g of deionized water, and 5g of nitrogen-doped coconut shel...

specific example 2

[0055] Specific example two: 0.05wt% gold catalyst supported by nitrogen-doped activated carbon. Get 5g common coconut shell charcoal, wash impurity with deionized water, its preparation step is identical with example one. Place activated carbon at 120 ? After drying in an oven at C for 10 hours, add 100 ml of 10 mol / L ammonia water at 25 o C, and stir for 24 hours. After filtering, place activated carbon in an air-isolated and 500 ? Under the condition of C, 10ml / min hydrogen gas is passed for 8 hours, at this time, the nitrogen content on the surface of the activated carbon can be increased from 0.25% to 1.00%. The evaluation condition of the catalyst in the example two is the same as the example one, and the volumetric space velocity of acetylene is 600 h -1 , hydrogen chloride flow / acetylene flow=1.1:1.0.

[0056] The initial activity, maximum activity and selectivity of the catalyst are shown in Table 1, and the change curve of the conversion rate with time is as follow...

specific example 3

[0057] Specific example three: 5.0wt% copper catalyst supported by nitrogen-doped activated carbon. Weigh 5g of the same nitrogen-doped coconut shell charcoal as example one, get 0.68g copper chloride (CuCl 2 2H 2 O, Beijing Chemical Plant, analytically pure) was dissolved in 8.5g deionized water, nitrogen-doped activated carbon was added under the condition of stirring at room temperature, and after stirring for 2 hours, it was put into 130 ? Dry in an oven at C for 8 hours. The evaluation condition of the catalyst in the example three is the same as that of the example one, and the volume space velocity of acetylene is 600 h -1 , hydrogen chloride flow / acetylene flow=1.1:1.0.

[0058] The initial activity, maximum activity and selectivity of the catalyst are shown in Table 1, and the change curve of the conversion rate with time is as follows figure 1 shown.

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Abstract

Belonging to the technical field of catalysts, the invention discloses a nitrogen doped carbon material loaded catalyst. The carbon material can realize nitrogen doping by means of nitrogen containing precursor chemical coupling and other surface modification methods, also a nitrogen source and a carbon source can be introduced simultaneously at high temperature for in situ synthesis of a nitrogen doped carbon material, and then a simple substance or compound of one or more of gold, copper, manganese, potassium or bismuth can be loaded on the nitrogen doped carbon material. The nitrogen doped carbon material loaded mercury-free catalyst involved in the invention has activity and stability obviously superior to those of ordinary carbon material loaded catalysts. Under certain reaction conditions, the activity of the nitrogen doped carbon material loaded catalyst is superior to that of ordinary carbon material loaded catalysts by over 10%. The carbon material and the catalyst disclosed in the invention are green and non-toxic, and have good environmental benefits. The process involved in the invention is simple, economical and feasible.

Description

technical field [0001] The invention relates to a catalyst for catalyzing the hydrochlorination of acetylene, in particular to a catalyst supported by a nitrogen-doped carbon material. The catalyst is a nitrogen-doped carbon material or a metal element and a compound are supported on the nitrogen-doped carbon material, and can catalyze acetylene and hydrogen chloride to generate vinyl chloride monomer with a high conversion rate for a long time, and belongs to the technical field of catalysts. Background technique [0002] Polyvinylchloride (PVC) is the second largest general-purpose resin in the world, and the synthesis of Vinyl Chloride Monomer (VCM) is the core part of the entire production process. [0003] There are two main ways to synthesize vinyl chloride: ethylene method and calcium carbide method. The current situation of resource distribution of "poor oil and rich coal" determines that my country's polyvinyl chloride mainly comes from coal routes, and more than 7...

Claims

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Application Information

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IPC IPC(8): B01J27/24B01J32/00C07C21/06C07C17/08
Inventor 罗国华周凯魏飞司江坤李春华周军
Owner TSINGHUA UNIV
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