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Fischer-Tropsch synthesis process based on fixed bed reactor

A technology of fixed bed reactor and Fischer-Tropsch synthesis, which is applied in the petroleum industry, the preparation of liquid hydrocarbon mixtures, and the production of hydrocarbons from carbon oxides. Solve problems such as low conversion rate in one pass, achieve sufficient heat transfer, good temperature control, and improve the effect of heat transfer

Active Publication Date: 2008-10-01
中科潞安能源技术有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Practice has also shown that the single-pass conversion rate of the hot gas cycle process is low, the yield of a single reactor is low, and the energy consumption of the gas cycle is huge

Method used

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  • Fischer-Tropsch synthesis process based on fixed bed reactor

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Embodiment 1

[0031] Prepare Co / ZrO according to the method described in Chinese patent CN1398669 2 catalyst. Prepare a concentration of 0.8M Co(NO 3 ) 2 , ZrOCl 2 and Mn(NO 3 ) 2 The mixed solution, wherein the content of Co in the mixed solution is 10wt%, ZrO 2 The content is 89.8wt%, the content of MnO is 0.2wt%, the preparation concentration is 0.2M Na 2 CO 3 solution. Under continuous heating and stirring, the above mixed solution and lye were added dropwise into the beaker for precipitation. The temperature of the precipitation was controlled at 70°C, and the pH value of the precipitation was controlled at 7. The precipitation was aged for 2 hours, and the precipitation was washed repeatedly until there was no chloride ion. The precipitate was baked at 100°C for 8 hours, and then burned in a muffle furnace at 500°C for 2 hours to prepare the catalyst. Grind the catalyst to 10-20 mesh and fill it in the fixed bed reactor 5 with a catalyst bed volume of 15L. Catalyst at 400°C,...

Embodiment 2

[0036] A Fischer-Tropsch synthesis catalyst was prepared according to Example 1. The raw material gas flows through the fixed bed reactor 5 from the upper inlet 6 of the fixed bed reactor and the circulating liquid medium entering from the top of the fixed bed reactor, and all the products flow out from the bottom of the fixed bed reactor 5 and enter the three-phase separator for separation. 8. Realize the separation of water, long-chain hydrocarbons and gas phase components. Others are the same as in Example 1.

Embodiment 3

[0038] Catalyst preparation: The catalyst was prepared according to the method described in Chinese patent CN1303738. Prepare a mixed solution of absolute ethanol, distilled water and glacial acetic acid in a volume ratio of 350:175:1 in a beaker. Add tetraethyl orthosilicate in the same amount as absolute ethanol while stirring. After standing for 3 hours, it becomes a gel, and the temperature in the preparation process is kept constant at 40°C. The gel was dried at 110°C, then calcined at 200°C for 1 h, at 250°C for 1 h, and at 350°C for 5 h to obtain SiO 2 carrier. A catalyst with a cobalt content of 20% was prepared by the equal volume impregnation method, and the mass ratio of the carrier to the water required for the incipient wetness of the carrier was 1:2. Prepare the cobalt nitrate solution according to the amount of water needed for the initial moistening of the carrier, and drop all the solution onto the carrier, let it stand for 5 hours, then dry it at 120°C, an...

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Abstract

The present invention provides a ft synthesis reaction process based on the fixed bed reactor is that the cycling medium enters from the top of the fixed bed reactor after preheated, the feed gas formed by mixing the syngas with the tail gas enters from the lower of the fixed bed reactor to contact with the catalyst to process ft synthesis , the product is fully collected to process the separation of water, a long chain hydrocarbon and a gas phase component; the long chain hydrocarbon processes C5-C18 middle distillate, the separation of C18+hydrocarbon and gaseous low carbon hydrocarbon, one part C5-C18 middle distillate is mixed with the cycling liquid medium, the other part is processed oil product process, C18+hydrocarbon fully enters in the oil product process, the gaseous low carbon hydrocarbon mixing with the gas phase component forms the tail gas, the water component is used as a gas agent to return in the gasification system. The invention has high heat exchange efficiency, high syngas throughput, lower cycling gas quantity, lower energy consumption, stable operation.

Description

technical field [0001] The invention relates to a Fischer-Tropsch synthesis reaction process based on a fixed-bed reactor. Background technique [0002] As a heterogeneous chemical reaction process, the research work of Fischer-Tropsch synthesis focuses on the development of high-efficiency catalysts and new reaction processes. Facts show that each time Fischer-Tropsch technology advances on the road to industrialization, it is accompanied by a major innovation in the reaction process. Sasol Company in South Africa chose the Arge process and the circulating fluidized bed process at the beginning of its establishment. The circulating fluidized bed reactor is superior to the Arge fixed bed in terms of heat transfer performance and reaction temperature control, but it is not sure about the scale-up. ; Sasol company subsequently developed a fixed-bed fluidized bed reactor (SAS) to cancel the catalyst circulation system, the added catalyst is effectively utilized, and the produc...

Claims

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Application Information

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IPC IPC(8): C10G2/00C07C1/04
Inventor 孙予罕李德宝贾丽涛陈从标
Owner 中科潞安能源技术有限公司
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