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Activity evaluation method for Fe-based ft (Fischer-Tropsch) synthesis catalyst

A technology for Fischer-Tropsch synthesis and Tropsch synthesis, which is applied in the direction of chemical analysis using catalysis, and can solve the problem of inability to quickly and effectively determine the deactivation boundary of iron-based Fischer-Tropsch synthesis catalysts.

Inactive Publication Date: 2019-10-22
CHNA ENERGY INVESTMENT CORP LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0017] The purpose of the present invention is to overcome the existing technology for evaluating the performance of iron-based Fischer-Tropsch synthesis catalysts that cannot quickly and effectively judge the deactivation boundary problem of iron-based Fischer-Tropsch synthesis catalysts, and to provide a method for evaluating the activity of iron-based Fischer-Tropsch synthesis catalysts , this method can achieve rapid deactivation of iron-based Fischer-Tropsch synthesis catalysts, which can save a lot of time for catalyst performance evaluation

Method used

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  • Activity evaluation method for Fe-based ft (Fischer-Tropsch) synthesis catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] The Fischer-Tropsch synthesis catalyst of 10g oxidized state is mixed with 300mL molten paraffin evenly to make a slurry, filled in a stirred tank reactor, first passed into an inert gas Ar for purging, and then introduced a reducing gas (H 2 and CO syngas, where the H in the syngas 2 The volume ratio of CO and CO is 20:1); adjust the pressure of the stirred tank reactor to the reduction and activation pressure of 0.5MPa, and control the space velocity of the reduction gas to 6000h -1 , first raise the temperature inside the stirred tank reactor from 30°C to 200°C at a heating rate of 40-45°C / h, and then raise the temperature inside the stirred tank reactor from 200°C at a heating rate of 5-10°C / h To 260°C, reduce and activate for 3 hours, and then introduce reducing gas containing inert gas Ar, wherein the volume percentage of inert gas Ar is 10%, and the rest is reducing gas.

[0068] The extent to which reductive activation proceeded was determined by measuring the ...

Embodiment 2

[0072] Mix 2g of oxidized Fischer-Tropsch synthesis catalyst with 10mL of quartz sand evenly, fill it into a fixed-bed reactor, and first pass inert gas N 2 Purge, then introduce reducing gas (H 2 and CO syngas, where the H in the syngas 2 The volume ratio of CO and CO is 30:1); adjust the pressure of the fixed bed microreactor to the reduction and activation pressure of 2.5MPa, and control the space velocity of the reduction gas to 6200h -1 , first raise the temperature inside the fixed-bed microreactor from 30°C to 200°C at a heating rate of 40-45°C / h, and then raise the temperature inside the fixed-bed microreactor from 200°C at a heating rate of 5-10°C / h ℃ to 260 ℃, reduction and activation for 4h, and then introduce inert gas containing N 2 The reducing gas, inert gas N 2 The volume percentage is 15%, and the rest is reducing gas.

[0073] The extent of the reduction activation reaction was determined using silica gel to absorb the moisture in the tail gas. When the ...

Embodiment 3

[0077] The Fischer-Tropsch synthesis catalyst of 10g oxidized state is mixed with 300mL molten paraffin evenly to make a slurry, filled in a stirred tank reactor, first passed into an inert gas Ar for purging, and then introduced a reducing gas (H 2 and CO syngas, where the H in the syngas 2 The volume ratio of CO and CO is 50:1); adjust the pressure of the stirred tank reactor to the reduction and activation pressure of 3MPa, and control the space velocity of the reduction gas to 8000h -1 , first raise the temperature inside the stirred tank reactor from 30°C to 200°C at a heating rate of 40-45°C / h, and then raise the temperature inside the fluidized bed reactor from 200°C at a heating rate of 5-10°C / h To 280°C, reduction and activation for 3 hours, and then introduce reducing gas H containing inert gas Ar 2 and CO synthesis gas, in which the volume percentage of inert gas Ar is 10%, and the rest is reducing gas H 2 and CO synthesis gas.

[0078] The extent to which reduct...

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Abstract

The invention relates to an activity evaluation method for a Fe-based ft synthesis catalyst, and relates to the field of Fe-based ft synthesis catalysts. The method comprises the following steps that(1) reducing gas is used to reduce and activate the Fe-based ft synthesis catalyst in the oxidation state to obtain the Fe-based ft synthesis catalyst in the reduction activation degree of 80-90%; (2)initial activity of the Fe-based ft synthesis catalyst, obtained in the step (1), in the reduction activation degree of 80-90% is stabilized in the initial active condition; (3) the initial activitystabilized Fe-based ft synthesis catalyst obtained in the step (2) makes contact with H2 and CO synthetic gas to make ft synthesis reaction under the ft synthesis condition lower; and (4) after the ftsynthesis reaction, the carbon formation quantity and inactivation rate of the Fe-based ft synthesis catalyst and selectivity of ft synthesis products are tested. The method can be used to rapidly select the Fe-based ft synthesis catalyst with optimal performance.

Description

technical field [0001] The invention relates to the field of iron-based Fischer-Tropsch synthesis catalysts, in particular to a method for evaluating the activity of iron-based Fischer-Tropsch synthesis catalysts. Background technique [0002] Fischer-Tropsch synthesis (F-T) refers to the reaction of CO hydrogenation into hydrocarbons under the action of catalysts (iron, cobalt, nickel, ruthenium, etc.). [0003] As the contradiction between oil supply and demand continues to increase, the search for alternative oil resources has become a topic of concern. Natural gas and coal will become one of the supplementary and alternative energy sources for oil in the new century. The development of alternative energy sources using natural gas and coal as raw materials is a carbon The most important research content of chemistry. my country's natural gas and coal reserves are abundant, and there is room for the development of one-carbon chemistry. The utilization of natural gas and n...

Claims

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Application Information

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IPC IPC(8): G01N31/10
CPCG01N31/10
Inventor 胡云剑苗强王涛张奉波孟祥堃门卓武吕毅军李永龙徐文强
Owner CHNA ENERGY INVESTMENT CORP LTD
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