Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Cobalt-based Fischer-Tropsch synthesis heavy hydrocarbon catalyst as well as preparation method and application thereof

A technology of Tropsch synthesis and catalyst, applied in the field of cobalt-based Fischer-Tropsch synthesis of heavy hydrocarbon catalysts and its preparation, can solve the problems of expensive carrier, undisclosed heavy hydrocarbon selectivity, etc. The effect of improving catalytic activity

Active Publication Date: 2018-08-24
XIAN ORIGIN CHEM TECH
View PDF10 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Patent No. CN 1398951 discloses a Co / TiO2 for Fischer-Tropsch synthesis of heavy hydrocarbons 2 Catalyst with high CO conversion rate, C 1 The selectivity is 7.7~18.8%, C 5 +Selectivity 68.3~85.9%, but heavy hydrocarbon selectivity is not mentioned, and TiO 2 Carriers are more expensive
The disclosed adopting ZrO of CN1401736 2 The cobalt-based Fischer-Tropsch synthesis catalyst used as a carrier also has the problem that the carrier price is relatively expensive, and the C 19 + Selectivity for heavy hydrocarbons

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Cobalt-based Fischer-Tropsch synthesis heavy hydrocarbon catalyst as well as preparation method and application thereof
  • Cobalt-based Fischer-Tropsch synthesis heavy hydrocarbon catalyst as well as preparation method and application thereof
  • Cobalt-based Fischer-Tropsch synthesis heavy hydrocarbon catalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] The catalyst of this embodiment is made up of the composition of following mass percentage: 15% cobalt, 0.1% rhenium, all the other are gamma-Al 2 o 3 carrier; the γ-Al 2 o 3 The pore size of the carrier is 14nm and the specific surface area is 280m 2 / g, the pore volume is 0.80mL / g.

[0041] The preparation method of the catalyst of the present embodiment comprises the following steps:

[0042] Step 1. Add 0.254mol cobalt nitrate hexahydrate and 0.127mol citric acid into deionized water to prepare a mixed solution, then add 1.4mL of perrhenic acid whose rhenium concentration is 71.4g / L, and dilute to 130mL with deionized water, Obtain an impregnation solution;

[0043] Step 2: Spray 65mL impregnating solution evenly onto 84.9g of γ-Al 2 o 3 On the carrier, impregnate equal volume at room temperature for 3.5h, and then dry at 70°C for 6h;

[0044] Step 3, the dried γ-Al in step 2 2 o 3 The carrier was calcined at 210°C for 1 hour, then heated to 300°C for 5 ho...

Embodiment 2

[0047] The catalyst of this embodiment is made up of the composition of following mass percentage: 18% cobalt, 0.3% rhenium, all the other are gamma-Al 2 o 3 carrier; the γ-Al 2 o 3 The pore size of the carrier is 12nm and the specific surface area is 300m 2 / g, the pore volume is 0.65mL / g.

[0048] The preparation method of the catalyst of the present embodiment comprises the following steps:

[0049] Step 1. Add 0.305 mol of cobalt acetate and 0.183 mol of citric acid into deionized water to prepare a mixed solution, then add 4.2 mL of perrhenic acid with a rhenium concentration of 71.4 g / L, and dilute to 120 mL with deionized water to obtain impregnation liquid;

[0050] Step 2: Spray 60mL impregnating solution evenly onto 81.7g of γ-Al 2 o 3 On the carrier, impregnate equal volume at room temperature for 2 hours, and then dry at 60°C for 8 hours;

[0051] Step 3, the dried γ-Al in step 2 2 o 3 The carrier was calcined at 190°C for 3 hours, then heated to 330°C fo...

Embodiment 3

[0054] The catalyst of this embodiment is made up of the composition of following mass percentage: 20% cobalt, 0.2% rhenium, all the other are gamma-Al 2 o 3 carrier; the γ-Al 2 o 3 The pore size of the carrier is 23nm and the specific surface area is 185m 2 / g, the pore volume is 1.00mL / g.

[0055] The preparation method of the catalyst of the present embodiment comprises the following steps:

[0056] Step 1. Add 0.339mol of cobalt acetate tetrahydrate and 0.271mol of ammonium ethylenediaminetetraacetate into deionized water to prepare a mixed solution, then add 4mL of ammonium perrhenate solution with rhenium concentration of 50g / L, and use deionized water Dilute to 140mL to obtain impregnation solution;

[0057] Step 2: Evenly spray 70mL impregnating liquid onto 79.8g of γ-Al 2 o 3 On the carrier, impregnate equal volume at room temperature for 5.5h, and then dry at 80°C for 5h;

[0058] Step 3, the dried γ-Al in step 2 2 o 3 The carrier is calcined at 200°C for 2...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Apertureaaaaaaaaaa
Specific surface areaaaaaaaaaaa
Pore volumeaaaaaaaaaa
Login to View More

Abstract

The invention discloses a cobalt-based Fischer-Tropsch synthesis heavy hydrocarbon catalyst which comprises the following components in percentage by mass: 15-25% of cobalt, 0.04-0.3% of rhenium and gamma-Al2O3 carrier. According to the catalyst disclosed by the invention, the gamma-Al2O3 with larger pore diameter, specific surface and pore volume is taken as a carrier, cobalt particles with moderate size are formed, material transfer is facilitated, and the selectivity of heavy hydrocarbons is improved. The invention further discloses a preparation method of the catalyst. The preparation method comprises the following steps: preparing impregnation liquid from a cobalt salt, a dispersing agent and rhenium liquid; impregnating onto the gamma-Al2O3 carrier, drying, calcining and cooling, thereby obtaining the catalyst. According to the catalyst disclosed by the invention, due to the method for two-step impregnating and adding the dispersing agent, the dispersion uniformity of the cobaltis improved, and the activity and selectivity of the catalyst are improved. The invention further discloses a Fischer-Tropsch synthesis method. With the adoption of temperature programming segmented reduction, the catalyst particles are prevented from sintering or agglomerating, the morphology stability of the catalyst is facilitated, and the service life of the catalyst is prolonged.

Description

technical field [0001] The invention belongs to the technical field of catalysts, and in particular relates to a cobalt-based Fischer-Tropsch synthesis heavy hydrocarbon catalyst and its preparation method and application. Background technique [0002] Fischer-Tropsch synthesis is a process of converting synthesis gas into hydrocarbons through a catalytic reaction, through which mixed hydrocarbons and some oxygenated compounds can be obtained, so Fischer-Tropsch synthesis has received extensive attention and research. Since the products of Fischer-Tropsch synthesis are complex and distributed in ASF (Anderson-Shulz-Flory), under the premise of ensuring the high activity of the catalyst, adjusting the product distribution and obtaining a certain fraction of products with high selectivity is the research goal of Fischer-Tropsch synthesis catalysts. one of the core issues. The production cost of Fischer-Tropsch synthesis is relatively high. From the perspective of commercial i...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): B01J23/889B01J37/02C10G2/00
CPCB01J23/8896B01J37/0205C10G2/332C10G2300/70
Inventor 张睿潘喜强齐小峰潘蕊娟王红梅谢小莉段超
Owner XIAN ORIGIN CHEM TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com