Synthesis gas liquification catalyst and catalyzing method thereof, beds and preparation method

Abstract

The invention relates to a synthesis gas liquification catalyst and a catalyzing method thereof, beds and a preparation method. The liquification catalyst comprises a primary catalyst and a secondary catalyst, wherein the primary catalyst adopts a fischer-tropsch catalyst obtained after component adjustment, and the secondary catalyst adopts a novel catalyst developed through synergistic effect of hydrocarbon. The catalyzing method of the synthesis gas liquification catalyst comprises steps as follows: firstly, synthesis gas reacts with the primary catalyst to be converted into a product with a main ingredient of saturated or unsaturated C1-C4 hydrocarbon and then reacts with the secondary catalyst to generate liquid hydrocarbon. The beds used for synthesizing the liquification catalyst comprise a first bed and a second bed, the first bed is loaded with the primary catalyst, and the second bed is loaded with a secondary catalyst. The preparation method comprises steps as follows: after the primary catalyst and the secondary catalyst are prepared respectively, the primary catalyst and the secondary catalyst are adjacently placed or physically mixed at the mass ratio of (0.1-10):1 to obtain the synthesis gas liquification catalyst. With the adoption of the catalyst, synthesis gas can be liquified under the reaction condition of ambient pressure.

Description

【Technical field】 [0001] The invention belongs to the technical field of inorganic catalysts, and in particular relates to a synthesis gas liquefaction catalyst, a catalytic method, a bed layer and a preparation method thereof. 【Background technique】 [0002] The synthesis gas liquefaction technology widely used in the industry is mainly based on the Fischer-Tropsch reaction. Under the action of traditional catalysts, the ideal liquid yield can only be obtained under the pressure of tens or even hundreds of atmospheres. Such a high reaction pressure puts forward strict requirements on the design and operation of the synthesis reactor, which directly leads to a substantial increase in equipment manufacturing and operating costs. In order to meet the high pressure operation, the synthesis gas needs to be compressed significantly. This compression process is accompanied by a large amount of external energy input. According to the energy balance, 2 / 3 of the energy demand of a...

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Problems solved by technology

Using the former mode of operation due to the high exothermic nature of the gas liquefaction reaction will cause local overheating of the catalyst bed due to its slow heat and mass transfer defects, making the catalyst deactivated due to sintering

Although the latter operation can effectively transfer the reaction heat to the nearby condensed water in time to avoid the deactivation of the catalyst due to local overheating, the complex structure of the reactor, high cost, unstable performance, and difficult maintenance seriously affect its performance. widely used

Another problem that cannot be ignored in the practical application of traditional Fischer-Tropsch catalysts is the relatively dispersed carbon chain distribution of the final liquid product, which directly leads to the low quality of the product and requires further separation and purification, which further increases the process cost.

The above-mentioned problems in the practical application of the traditional synthesis gas liquefaction technology have directly led to the high production cost of this technology under the background of a sufficient supply of crude oil and a sharp drop in the sales price of gasoline after the oil crisis. Demand for synthetic gasoline has plummeted, making its production shrink sharply

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