Application of Cu-Fe-based catalyst in synthesis of higher alcohol with synthetic gas
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A catalyst and synthesis gas technology, which is used in the preparation of hydroxyl compounds, the preparation of organic compounds, catalysts for physical/chemical processes, etc., to achieve the effects of stable performance, improved selectivity, and low requirements for reaction equipment
Active Publication Date: 2012-12-26
GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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Problems solved by technology
[0003] my country's existing high-carbon alcohol industry has a weak foundation, backward technology, and low output
Method used
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Embodiment 1
[0022] By expression Cu 30 Fe 20 co 5 Se 2 / (SiO 2 ) 43 , wherein: x=30, y=20, z=5+2=7, y / x=0.667, z / x=0.23, prepare the catalyst, get 10.0g 30~100 mesh microsphere silica gel, according to the ratio of the above expression Prepare Cu, Fe, Co, Se nitrate aqueous solution (impregnated with equal volume), soak at room temperature for 4 hours, and then dry at 200°C. Then the temperature was raised to 400°C at a rate of 1.0°C / min and fired for 8 hours, and then cooled to room temperature naturally.
[0023] The prepared catalyst was moved into the reactor, and H 2 Reduce at 400°C for 8 hours, then switch to syngas at a pressure of 1.0-15.0MPa, a temperature of 350°C, and a space velocity of 6000h -1 , H 2 / CO=2, the liquid phase product was collected in an ice-water bath, and the product composition was analyzed by gas chromatography. The obtained results are shown in Table 1:
[0024] Table 1
[0025]
Embodiment 2
[0027] By expression Cu 25 Fe 25 Zn 1 K 2 / (Al 2 o 3 ) 43 , wherein: x=25, y=25, z=3, y / x=1, z / x=0.12, prepare catalyst, get 10.0g Al 2 o 3 , configure the oxalate of Cu, Fe, Zn, K in the aqueous solution (with equal volume impregnation) containing ethanol 5% by above-mentioned expression ratio, all the other are with embodiment 1. Pressure 5.5MPa, temperature 150-400℃, space velocity 4000h -1 , H 2 / CO=2, the obtained results are shown in Table 2:
[0028] Table 2
[0029]
[0030]
Embodiment 3
[0032] By expression Cu 20 Fe 40 Cr 2 / (SiO 2 ) 38 , where x=20, y=40, z=2, y / x=2, z / x=0.10 to prepare the catalyst, take 10.0g of 30-100 mesh microsphere silica gel, configure Cu, Fe, Cr according to the ratio of the above expression Acetate contains 30% acetone aqueous solution (with equal volume impregnation), and all the other are with embodiment 1. Pressure 5.5MPa, temperature 320℃, space velocity 500~14000h -1 , H 2 / CO=2, the obtained results are as follows:
[0033] table 3
[0034]
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Abstract
The invention provides a Cu-Fe-based catalyst used in synthesis of a higher alcohol with synthetic gas having high C5<+> alcohol selectivity and a preparation method thereof. The expression of the catalyst is CuxFeyMz / SiO2, CuxFeyMz / Al2O3 or CuxFeyMz / (SiO2+Al2O3), wherein M is one or the combination of a transition metal element, an alkali metal element, an alkali earth metal element or a rare earth element; a catalyst carrier is SiO2 or Al2O3 or a mixture of SiO2 and Al2O3; the percentages by weight of active ingredients, i.e., Cu, Fe and M loaded in the catalyst are x, y and z based on the total weight of the catalyst; y / x=0.5-2; z / x=0.001-0.4; x+y+z is more than or equal to 20 percent and less than or equal to 85 percent; and the balance is a catalyst carrier. The catalyst is prepared by soaking and performing stepwise reduction. The Cu-Fe-based catalyst can be used in a process for synthesizing a higher alcohol with synthetic gas. The catalyst has low cost, a simple preparation method and stable performance, and is easy for industrial scale-up production. Compared with catalysts of the same type, the catalyst used in synthesis of the higher alcohol with synthetic gas has the advantages of mild reaction condition and low requirement on reaction equipment.
Description
【Technical field】 [0001] The invention relates to the technical field of chemical engineering, in particular to a Cu-Fe-based catalyst for preparing higher-carbon alcohols from synthesis gas and its application in the process of synthesizing higher-carbon alcohols from synthesis gas. 【technical background】 [0002] Higher alcohols refer to monohydric alcohols containing more than five carbon atoms. usually C 5 ~C 10 Alcohols in the range are called plasticizer alcohols, and the C 12 The above alcohols are called detergent alcohols. They are important fine chemical raw materials for the synthesis of surfactants, detergents, plasticizers and other fine chemical products, and have important industrial application value. High-carbon alcohols and their derivatives have excellent properties such as high unit output value and large added value, and have been widely used in the fields of synthesis of three major materials, textiles, papermaking, food, medicine, leather, construc...
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