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Iron/manganese catalyst used for Fischer Tropsch synthesis, its preparation method and application

A technology of Fischer-Tropsch synthesis and manganese catalysts, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem of high nickel ratio and no research on Fischer-Tropsch reaction behavior , Catalysts have not received widespread attention, etc., to achieve the effect of low production cost and high mechanical strength

Active Publication Date: 2005-08-10
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, the proportion of nickel as the active component of these two catalysts is relatively high, and the catalyst is entirely the reaction behavior of nickel, so this type of catalyst has not received widespread attention, and almost no research has involved the cost of iron / manganese / nickel multi-component catalysts. Torresponse behavior

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Take 10Kg Fe(NO 3 )3 9H 2 O, 180g 50% Mn(NO 3 ) 2 solution, 14gNi(NO 3 ) 2 ·6H 2 O and 2.9Kg Ca(NO 3 ) 2 4H 2 O was dissolved in 80Kg deionized water to obtain a mixed solution containing iron, manganese, nickel and calcium, which was placed in an acid-proof tank and preheated to 40°C. Prepare 35Kg of 12wt% ammonia solution and place it in an alkali-resistant tank. Use an acid-resistant pump and an alkali-resistant pump to continuously pump the mixed salt solution and ammonia solution into a continuously stirring precipitation tank, keep the temperature at 30°C, and the pH value at 9.0. After the precipitation, it was left to age for 48 hours, filtered with suction, washed repeatedly with deionized water until the pH value was 8.0, and 13.5 kg of filter cake was obtained. The water ratio filter cake is 1: 1 deionized water, 300g concentration is 30wt% silica sol solution and 1.0 liter concentration is 0.2 mol / liter K 2 CO 3 The solution is added to the filte...

Embodiment 2

[0037] Take 10Kg Fe(NO 3 ) 3 9H 2 O, 8.9Kg 50% Mn(NO 3 ) 2 solution, 70gNi(NO 3 ) 2 ·6H 2 O and 170g Ca(NO 3 ) 2 4H 2 O was dissolved in 60Kg deionized water to obtain a mixed solution containing iron, manganese, nickel and calcium, which was placed in an acid-proof tank and preheated to 60°C. Prepare 10wt% Na 2 CO 3 The solution is 80Kg and placed in an alkali-resistant tank. The mixed salt solution and Na 2 CO 3 The solution was poured into a continuously stirred precipitation tank, the temperature was maintained at 40°C, and the pH value was 7.5. After the precipitation, it was aged for 32 hours, filtered with suction, and washed repeatedly with deionized water until the pH value was 7.0, and about 18.8 kg of filter cake was obtained. Deionized water with a water ratio of 0.9:1 to the filter cake, 900 g of a 20 wt % silica sol solution and 1.2 liters of a 0.6 mol / L KOH solution were added to the filter cake at the same time, and fully stirred for beating. Se...

Embodiment 3

[0039] Take 10Kg Fe(NO 3 ) 3 9H 2 O, 1.8Kg 50% Mn(NO 3 ) 2 Solution, 210gNi(NO 3 ) 2 .6H 2 O and 580g Ca(NO 3 ) 2 4H 2 O was dissolved in 35Kg deionized water to obtain a mixed solution containing iron, manganese, nickel and calcium, which was placed in an acid-proof tank and preheated to 90°C. Prepare 30Kg of 15wt% NaOH solution and preheat it to 60°C in an alkali-resistant tank. Use an acid-resistant pump and an alkali-resistant pump to continuously pump the mixed salt solution and NaOH solution into a continuously stirring precipitation tank, keep the temperature at 55°C, and the pH value at 10.5. After the precipitation, it was left to age for 8 hours, filtered with suction, washed repeatedly with deionized water until the pH value was 7.0, and about 13.6 kg of filter cake was obtained. The water ratio filter cake is 1.2: 1 deionized water, 960g concentration is 25wt% silica sol solution and 1.5 liters concentration is the KCH of 0.8 mol / liter 3 COO (potassium ...

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Abstract

An Fe / Mn catalyst for Fischer-Tropsch synthesis is prepared from Fe, Mn, Ni, alkali-earth metal, alkali metal and carrier proportionally through continuous coposition and spray drying. Its advantages are large specific surface area, high transform rate and high selectivity to hydrocarbon.

Description

technical field [0001] The invention belongs to an iron / manganese catalyst for Fischer-Tropsch synthesis and its preparation method and application, specifically an iron / manganese catalyst for slurry phase Fischer-Tropsch synthesis adding various additives and its preparation method and apply. Background technique [0002] Fischer-Tropsch synthesis is a technology that uses synthesis gas to react on catalysts to synthesize hydrocarbons and organic chemicals. Catalysts with iron as the main active component are widely used because of their low cost and high activity. As early as the 1950s, Sasol Company in South Africa successfully realized the industrialization of Fischer-Tropsch synthesis with iron-based catalysts (M.E.Dry et al, Catalysis Today, 1990, 6(3) 183). Commonly used reactors for Fischer-Tropsch synthesis include fixed-bed, fluidized-bed and slurry-bed reactors. Slurry-phase reactors have excellent heat transfer, mass transfer behavior and low operating costs, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/889C07C1/04
Inventor 相宏伟张成华杨勇陶智超李廷真李永旺
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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