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Catalyst for synthesizing gas light hydrocarbon and preparation method of catalyst

A technology for synthesis gas and light hydrocarbons, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxides/metal hydroxide catalysts, etc. The selectivity is not high enough, the product is not concentrated enough, etc., to achieve good technical effects, excellent catalytic effects, and improved activity

Active Publication Date: 2016-03-02
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0028] The technical problem to be solved by the present invention is that in the prior art, since the synthesis gas to light hydrocarbon reaction is a strong exothermic reaction, when a fixed bed is used, it is difficult to remove the heat of the reaction, and it is easy to overheat, so that the catalyst is easily deactivated; When changing the bed, the product is not concentrated enough, and the selectivity of light hydrocarbons, especially low-carbon olefins, is not high enough. Provide a new method for producing low-carbon olefins from syngas

Method used

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  • Catalyst for synthesizing gas light hydrocarbon and preparation method of catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] Take 587.8 grams of ferric nitrate, add 1000 g of water to dissolve, obtain material I, take 0.4 g of lanthanum nitrate and add 10 g of water to dissolve, obtain material II, take 25.5 grams of 50% manganese nitrate and 21.64 grams of zinc nitrate in the same container, add 100 g of water , stirring and dissolving to obtain material III.

[0060]Materials I, II, and III are mixed, and 312.5 grams of 40% (weight) aluminum sol materials are added under stirring, then 50 g of a solution containing 0.1 gram of KOH is added, and the pH value of the above-mentioned slurry is adjusted with ammonia water to make the pH of the mixed slurry = 6.0, after sufficient stirring, the prepared slurry is carried out in a spray dryer according to the usual method to form microspheres, and finally the internal diameter is 89 mm, and the length is 1700 mm (φ89 × 1700 mm) in a rotary roaster. Calcined at 500°C for 2.0 hours, the composition of the prepared catalyst is:

[0061] 50 wt% Fe 1...

Embodiment 2

[0063] Take 587.7 grams of ferric nitrate, add 1000 g of water to dissolve, and obtain material I, take 0.4 g of lanthanum nitrate and add 10 g of water to dissolve, obtain material II, take 25.5 grams of 50% manganese nitrate and 21.63 grams of zinc nitrate in the same container, add 100 g of water , stirring and dissolving to obtain material III.

[0064] Materials I, II, and III are mixed, and 312.5 grams of 40% (weight) aluminum sol materials are added under stirring, and then 0.1 gram of KOH and 0.06 gram of RuCl are added. 3 50g of the solution, adjust the pH value of the above slurry with ammonia water to make the pH=6.0 of the mixed slurry, after fully stirring, the prepared slurry is carried out into microspheres in a spray dryer according to the usual method, and finally the inner diameter is 89 mm, length is 1700 mm (φ89 * 1700 mm) rotary roaster at 500 ℃ roasting 2.0 hours, the catalyst composition of making is:

[0065] 50 wt% Fe 100 mn 0.1 Zn 5.0 K 0.1 La 0...

Embodiment 3

[0067] Take 587.6 grams of ferric nitrate, add 1000 g of water to dissolve, obtain material I, take 0.4 g of lanthanum nitrate and add 10 g of water to dissolve, obtain material II, take 25.5 grams of 50% manganese nitrate and 21.63 grams of zinc nitrate in the same container, add 100 g of water , stirring and dissolving to obtain material III.

[0068] Materials I, II, and III were mixed, and 312.5 grams of 40% by weight aluminum sol material was added under stirring, and then 0.1 gram of KOH, 0.04 gram of PdCl and 0.06 gram of RuCl were added. 3 50g of the solution, adjust the pH value of the above-mentioned slurry with ammonia water so that the pH=6.0 of the mixed slurry, obtain the slurry after fully stirring, carry out the microsphere molding of the prepared slurry in a spray drier according to the usual method, Inner diameter is 89 millimeters at last, and length is 2.0 hours in 500 ℃ of roastings in the rotary roaster of 1700 millimeters (φ 89 * 1700 millimeters), and t...

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Abstract

The invention relates to a catalyst for synthesizing gas light hydrocarbon and a preparation method of the catalyst. The problems that in the prior art, gas light hydrocarbon synthesizing reaction is strong-heat-release reaction, when a fixed bed is used, reaction heat removal is difficult, temperature runaway is prone to happening, and inactivation is prone to happening by means of the catalyst, and when a fluidized bed is used, product is not concentrated enough during distribution, and low-carbon olefin selectivity is low are mainly solved. Through the technical scheme that synthesized gas as the raw material makes contact with the iron-base fluidized bed catalyst, with the composition of chemical formula of Fe100KaZnbMncLadOx as the active component according to the atomic ratio, in a fluidized bed with alumina as the carrier to react and generate light hydrocarbon, the problems are well solved, and the catalyst can be used for industrial production of synthesizing gas light hydrocarbon in the fluidized bed.

Description

technical field [0001] The invention relates to a catalyst for producing light hydrocarbons from synthesis gas and a preparation method thereof. Background technique [0002] The method of converting synthesis gas into hydrocarbons through catalyst action was invented by German scientists Frans Fischer and Hans Tropsch in 1923, referred to as F-T synthesis, that is, CO undergoes a heterogeneous catalytic hydrogenation reaction on a metal catalyst to produce straight-chain alkanes and alkenes. Master's mixture process. Germany carried out research and development in the 1920s and realized industrialization in 1936. After World War II, it was closed because it could not compete economically with the oil industry; South Africa has abundant coal resources, but lacks oil resources and has long-term Restricted by international social economic and political sanctions, it was forced to develop coal-to-oil industrial technology, and built the first coal-based F-T synthetic oil plant...

Claims

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Application Information

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IPC IPC(8): B01J23/889C07C1/04
Inventor 陶跃武庞颖聪宋卫林李剑锋
Owner CHINA PETROLEUM & CHEM CORP
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