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Catalyst for making liquid hydrocarbon from synthesized gas and method

A catalyst, liquid hydrocarbon technology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., to ensure the effect of repeatability

Inactive Publication Date: 2003-03-26
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the process of catalyst preparation, researchers only examine the influence of preparation parameters or chemical composition on catalyst performance from a chemical point of view, while ignoring the influence of continuous flow reactor engineering factors on catalyst preparation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] 1. Determine the flow rate at which the reactor maintains plug flow:

[0038] In the continuous precipitation reactor 5 with an internal diameter of 25 mm, the KCL saturated solution is used as the tracer, and the tap water is used as the precursor solution for simulating catalyst preparation. Under stirring and non-stirring conditions, the residence time distribution curve of the measured tracer concentration σ of 2 , according to σ 2 =2 / Pe and Pe=u*L / D obtained Pe number and dispersion coefficient D are as follows: solution flow rate, liter / hour stirring speed, rev / min Pe D, cm 2 / Second

[0039] 4.5 800 1.00 11.91

[0040] 10.0 800 11.21 2.54

[0041] 10.0 0 0.98 27.95

[0042] 18.0 800 22.39 2.20

[0043] 28.0 800 32.88 2.41

[0044] 32.0 800 40.51 2.16

[0045] 34.0 800 40.91 2.43

[0046] It can be seen from the above that for a continuous precipitation reactor with an inner diameter of 25 mm, the liquid flow rate is in the range of 10-34 li...

Embodiment 2

[0050] Modulus 3.3 industrial potassium silicate solution 48.6g binder is not directly added to the precipitant solution, but added after the precipitation reaction, washing, filtration, and the rest of the preparation is the same as in Example 1. Catalyst composition is identical with embodiment 1. The reaction results are shown in Table 1. (Attached)

Embodiment 3

[0052] In this example no binder was added. 600g Fe(NO 3 ) 3 9H 2 O and 9.48gCu(NO 3 ) 2 ·3H 2 O was added to 6 liters of deionized water to prepare a mixed solution of ferric nitrate and copper nitrate. The solution was heated to 80°C and placed in overhead tank 1 for use. Add 450ml of concentrated ammonia water with a concentration of 28% to 5.55 liters of deionized water to obtain a precipitant solution with a pH value of 11.55 and place it in the head tank 2 for use. The solutions in head tank 1 and head tank 2 pass through pump 3 and rotameter 4 respectively, and enter the bottom of continuous precipitation reactor 5 tangentially at flow rates of 6.1 L / h and 5.4 L / h. Reactor 5 is equipped with 13 stages of stirring shaft 6 with two-blade paddles at radial intervals of 180 degrees, which are connected to the speed regulating motor. Starting the motor drives the stirring shaft 6 to rotate. The motor speed is controlled at 800±50 rpm. gauge measurement. The temperat...

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Abstract

The present invention provides a preparation method of iron / copper potassium / cilicone catalyst is characterized by that the addition method of adhesive adopts a method capable of fully and uniformly mixing adhesive and precipitant so as to ensure that the adhesive can be uniformly distributed in the prepared catalyst, and in the process of preparing catalyst it utilizes applied chemical engineering principle to make the metal salt solution and adhesive and precipitant mixed solution parallelly flow upwards in flowing state of piston flow and pass through the continuous precipitation reactor with multi-stage stirring blades so as to ensure the reproducibility of catalyst preparation.

Description

[0001] Field: [0002] The invention belongs to a catalyst for converting synthesis gas into liquid hydrocarbons in a fixed bed or a slurry bed and a preparation method thereof Background technique: [0003] It is well known that the purpose of adding a binder to the iron / copper / potassium catalyst prepared by the precipitation method is to make the catalyst active component (for example, α-Fe 2 o 3 ) separation, to avoid the loss of activity of the catalytic active components due to local overheating and sintering caused by the exothermic reaction; on the contrary, due to the improvement of the separation of the catalytic active components, the dispersion of the catalytic active components is improved, and the growth rate of the iron crystal is reduced. Thereby improving the thermal stability of the catalyst. In addition, catalyst physical properties, such as surface area and pore size, are improved due to the separation of catalyst active components. The ARGE catalyst that...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/78C07C1/02
Inventor 赵玉龙苏晓丽毕继诚
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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