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Nano-catalyst suitable for slurry condition bed, production method and application thereof

A nano-catalyst, slurry bed technology, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, hydrocarbon production from carbon oxides, etc. Simple process, controllable conditions and highly selective effect

Inactive Publication Date: 2008-09-24
SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI +3
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this process can be operated continuously in a slurry bed, the separation of the final product and the polymer stabilizer is a difficult problem, and the catalyst will cause the formation of nanoparticles if the polymer stabilizer is removed before the reaction. Agglomeration makes it lose the nano effect

Method used

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  • Nano-catalyst suitable for slurry condition bed, production method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment example 1

[0016] 10g Co(NO3) 2 .6H 2 O is dissolved in 1000ml hexanol and heated to reflux at 180℃ for 3 hours to obtain 5-10nm Co 3 O 4 Nanoparticles in hexanol solution.

[0017] Take the above 200ml containing Co 3 O 4 The hexanol solution of nanoparticles was put into a 1L slurry stirred tank, and the temperature was programmed and reduced in pure hydrogen. The reduction conditions were 300℃, 0.2MPa, 1200h -1 (V / V), 800rpm, 10h. After reduction, the temperature is lowered and switched to syngas for reaction. The reaction conditions are 190℃, 2MPa, 1200h -1 (V / V), 800rpm, H 2 / CO=2 / 1. In order to ensure that the Fischer-Tropsch synthesis reaction enters a steady state, a transition operation for more than 24 hours is required to consider the reaction system to enter a steady state operation. Product CO, CO 2 , CH 4 And H 2 Detect with carbon molecular sieve column and TCD, detect gaseous hydrocarbon with Porapak-Q column and FID, and detect oil and wax samples with OV-101 capillary colum...

Embodiment example 2

[0019] 10g Fe(NO 3 ) 2 .6H 2 O is dissolved in 500ml hexanol and heated to reflux at 180℃ for 4 hours to obtain 10-20nm Fe 2 O 3 Nanoparticles in hexanol solution.

[0020] Take the above 200ml containing Fe 2 O 3 The hexanol solution of nanoparticles is put into a 1L slurry stirred tank, and the temperature is programmed to reduce in the synthesis gas. The reduction conditions are 350℃, 0.5MPa, 1000h -1 (V / V), 800rpm, 12h. After reduction, the temperature is lowered for reaction, and the reaction conditions are 210℃, 2MPa, 1200h -1 (V / V), 800rpm, H 2 / CO=1.2 / 1. The catalytic reaction performance evaluation is listed in Table 1.

Embodiment example 3

[0022] 6g Co(NO3) 2 .6H 2 O was dissolved in 300ml of octanol and heated at 190°C under reflux for 3 hours to obtain 60-80nm Co dispersed in octanol 3 O 4 Particles.

[0023] Take the above 200ml containing Co 3 O 4 The octanol solution of nanoparticles was put into a 1L slurry stirred tank, and the temperature was programmed and reduced in the synthesis gas. The reduction conditions were 400℃, 0.2MPa, 500h -1 (V / V), 500rpm, 18h. After reduction, the temperature is lowered for reaction, and the reaction conditions are 200℃, 1.2MPa, 500h -1 (V / V), 500rpm, H 2 / CO=2.5 / 1. The catalytic reaction performance evaluation is listed in Table 1.

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Abstract

The invention provides a nano catalyst suitable for slurry, and relates to a nano-metal oxide composed of Fe, Co and Ni, with a particle size ranging from 5 nanometers to 200 nanometers. The nano-metal oxide is dispersed in an alcohol solvent to form a stable system. The catalyst provided by the invention has higher reactivity and higher selectivity of C5<+>. Besides, the nano catalyst has simple preparation, controllable condition and wide application prospect.

Description

Technical field [0001] The invention relates to a catalyst and a preparation method and application thereof, in particular to a nano catalyst suitable for a slurry bed and preparation and application. Background technique [0002] In the 1980s, the lack of fuel and environmental pollution caused Fischer-Tropsch synthesis to attract people's attention again, and the world's major oil companies began to invest in this field on a large scale. Compared to extracting gasoline and diesel from crude oil, the Fischer-Tropsch synthesis process is considered to be a friendly process for preparing middle distillates and lubricants from synthesis gas. The content of sulfur and aromatic hydrocarbons in the synthesized liquid fuel is extremely low. Cobalt-based catalysts are considered the best low-temperature FT catalysts due to their high stability, high conversion rate and high selectivity of heavy hydrocarbons. Although FT technology has experienced decades of research and development, the...

Claims

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Application Information

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IPC IPC(8): B01J23/75B01J23/745B01J23/755C07C1/04C10G2/00
Inventor 孙予罕王月伦贾丽涛李德宝侯博
Owner SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
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