Process for producing synthetic liquid hydrocarbons and reactor for fischer-tropsch synthesis

一种反应器、液态烃的技术，应用在天然气化工,石油化工,煤化工领域，能够解决差产品质量、选择性低等问题

Inactive Publication Date: 2012-10-17
INFRA XTL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The latter approach leads to poor product quality due to low selectivity to the target product

Method used

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  • Process for producing synthetic liquid hydrocarbons and reactor for fischer-tropsch synthesis
  • Process for producing synthetic liquid hydrocarbons and reactor for fischer-tropsch synthesis
  • Process for producing synthetic liquid hydrocarbons and reactor for fischer-tropsch synthesis

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] In a shell-and-tube reactor with a cylindrical tube with a total length of 6m, it includes two parts, the top and the bottom, and has a catalyst. The gas flow rate is delivered into the tube.

[0043] The 2.5 mm cobalt catalyst particles filled into the tube with a porosity of 0.4 were used. At the above gas hourly space velocity, the suitable catalytic temperature range of the catalyst was 210-217 °C. Water is fed into the housing at 210°C at a pressure of 19.1 bar (absolute).

[0044] The bottom has a diameter of 50nm and the top has a diameter of 25nm, a ratio of 2:1.

[0045] The length of the top is 3m, the length of the bottom is 3m, the ratio is 1:1.

[0046] The pressure gradient is 0.6 bar / m at a conversion rate of 60% near the top outlet.

[0047] With a pressure gradient below 0.1 bar / m at the bottom inlet, the reaction temperature increased from 210°C to 217°C.

[0048] The conversion at the reactor outlet reaches 80% with an overall pressure difference ...

Embodiment 7

[0059] Examples 7 to 9 illustrate that the use of known processes results in liquid product overflow in the tube, making the reaction inevitably fail (Example 7); or far away from the appropriate temperature range, causing the reaction to be deactivated by the catalyst and terminate the reaction (Example 8); or part of the pipe overflows and deviates from the appropriate temperature range at the same time, forming conditions that are unfavorable to the performance of the catalyst, which increases the energy consumption of compressed gas in the process design (Example 9).

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Abstract

The present invention relates to petrochemistry, gas chemistry, coal chemistry, particularly to a synthesis of hydrocarbons C5 and higher from CO and H2 under the Fischer- Tropsch reaction; the invention relates to a process and a system for producing synthetic liquid hydrocarbons. A process for producing synthetic liquid hydrocarbons is provided by catalytic converting syngas under the Fischer-Tropsch reaction on a fixed catalyst bed in a vertical shell and tube reactor with coolant supply into shell wherein as soon as the syngas conversion degree achieves 60-80%, a pressure gradient along the tubes is reduced below 0.1 bar / m and this value is maintained during the whole process. A reactor for Fischer-Tropsch synthesis is provided comprising tubes with catalyst in a shell, the ratio of the tube diameter at the tube outlet to the diameter at the inlet is from 1.5 / 1 to 2.5 / 1. The invention gives a possibility to achieve the optimum temperature range in the catalyst bed; and it improves heat and mass-transfer and shut out an accumulation of the liquid products in the bottom of the tubes.

Description

technical field [0001] The present invention relates to petrochemical industry, natural gas chemical industry, coal chemical industry field, relate in particular to a kind of carbon monoxide and hydrogen synthesis C by Fischer-Tropsch synthesis reaction 5 Method for hydrocarbons and above; The present invention discloses a method and system for producing liquid hydrocarbons. Background technique [0002] The Fischer-Tropsch synthesis reaction method has been developed rapidly in the past century and is immediately applied to industrial production. In the past, the synthesis was carried out in fixed bed reactors and subsequently in reactors with more complex structures due to the demand for increased catalyst efficiency and the need for solutions to heat removal problems. [0003] The Fischer-Tropsch synthesis reaction is carried out at high pressure and in the presence of a catalyst based on a metal selected from Group VIII of the Mendeleev Periodic Table; the process is an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G2/00B01J8/02
CPCC10G2/341C10G2300/1022B01J2219/1946B01J2208/00238C10G2300/4012B01J8/067C10G2/332
Inventor 瓦季姆·谢尔盖耶维奇·叶尔莫拉耶夫弗拉基米尔·扎尔曼诺维奇·莫尔德科维奇伊戈尔·格里戈里耶维奇·所罗门尼克伊戈尔·弗拉基米罗维奇·德瑞维奇莉莉亚·瓦迪莫娃·西内娃爱德华·鲍里索维奇·米特伯格
Owner INFRA XTL TECH
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