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Low-carbon emission Fischer-Tropsch synthesis reaction process

A technology of Fischer-Tropsch synthesis and carbon emission, which is applied in the petroleum industry, producing hydrocarbons from carbon oxides, and the preparation of liquid hydrocarbon mixtures. It can solve the problems of lack of attention to tail gas, high construction costs of urea synthesis plants, etc., and achieve low cost , make full use of it, and realize the effect of low carbon emission

Inactive Publication Date: 2011-02-23
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Chinese patents CN1354779A and CN1761734A respectively announced a process for Fischer-Tropsch synthesis to produce liquid hydrocarbons, but did not pay attention to the tail gas produced in the process
However, it is necessary to set up a special ammonia synthesis section for this purpose, and the construction cost of the urea synthesis plant is high

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0028] (1) Catalyst preparation

[0029] Cobalt-based Fischer-Tropsch synthesis catalyst. Cobalt-based catalysts were prepared with reference to Chinese patent CN1401736A. The zirconia carrier was prepared by using ammonia solution as precipitant and zirconium oxychloride as zirconium source. Then use cobalt nitrate as the cobalt precursor, and use the equal volume impregnation method to load cobalt on the obtained zirconia, and the obtained sample is dried and calcined to make a composition of Co 12wt% / ZrO 2 88% cobalt-based Fischer-Tropsch synthesis catalyst.

[0030] reforming catalyst. The reforming catalyst was prepared with reference to Chinese patent CN1248492A. According to the composition of Cu 40%, Zr 30%, Mn 20%, Ni 9.9%, Al 0.1% (mole percentage), configure the solution, in which zirconium oxychloride is the precursor of Zr, and the precursors of other elements are nitrates . Sodium carbonate is used as precipitating agent, and flow precipitation. The precip...

Embodiment 2

[0035] (1) Catalyst preparation

[0036] Cobalt-based Fischer-Tropsch synthesis catalyst. Cobalt-based catalysts were prepared with reference to Chinese patent CN 1398669A. By the content 10wt% of cobalt in the mixed solution, the zirconia content is 89.8wt%, and the content of manganese oxide is 0.2wt% to prepare the mixed solution (both percent by weight) of cobalt nitrate, zirconium oxychloride and manganese nitrate, with sodium carbonate As a precipitating agent, under continuous heating and stirring conditions, the mixed solution and precipitating agent are added dropwise, and the resulting precipitate is washed, dried and roasted to obtain a composition of Co 10wt% / ZrO 2 89.8wt% / MnO 2 0.2 wt% cobalt-based Fischer-Tropsch synthesis catalyst.

[0037] reforming catalyst. Carbon dioxide reforming catalyst was prepared according to Example 1.

[0038] (2) Implementation of process method

[0039] This embodiment adopts figure 1 The process flow shown. Coal-to-gas is ...

Embodiment 3

[0042] (1) Catalyst preparation

[0043] Cobalt-based Fischer-Tropsch synthesis catalyst. Cobalt-based catalysts were prepared with reference to Chinese patent CN1398951A. First pour tetrabutyl titanate (TBOT) into the dissolved C 12 h 30 (EO) 30 ethanol solution, stirred at room temperature for 1 h, and then added dropwise to water-ethanol solution to obtain a molar ratio of TBOT:C 12 h 30 (EO) 30 :H 2 O: EtOH = 1: 0.02: 4: 15 mixed solution, let stand for 72h, filter and then impregnate zirconium nitrate, after drying and roasting, 5wt% ZrO 2 / TiO 2 carrier. Cobalt was loaded on the obtained carrier by the equal volume impregnation method, and then dried and calcined to obtain 12wt% Co / ZrO 2 -TiO 2 catalyst.

[0044] reforming catalyst. Carbon dioxide reforming catalyst was prepared according to Example 1.

[0045] (2) Implementation of process method

[0046] This embodiment adopts figure 1 The process flow shown. Coal-to-gas and synthesis gas obtained by c...

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Abstract

The invention discloses a low-carbon emission Fischer-Tropsch synthesis reaction process. The process comprises the following steps of: mediating the ratio of hydrogen to carbon of coal syngas, decarbonizing and separating to obtain a Fischer-Tropsch synthesis raw material gas and carbon dioxide (CO2); after mixing the Fischer-Tropsch synthesis raw material gas and a recycled tail gas, performing a Fischer-Tropsch synthesis reaction in a Fischer-Tropsch synthesis reactor; performing gas-liquid separation on a Fischer-Tropsch synthetic product to obtain a non-condensable tail gas which comprises long-chain hydrocarbons serving as a main liquid component and methane serving as a main component, wherein part of the non-condensable tail gas is used as the recycled tail gas; mixing non-recycled non-condensable tail gas and the CO2 to form a mixed gas; and generating a syngas by performing a reforming reaction on the mixed gas by catalyzing by using a reforming catalyst. The process has the advantages of obtaining the long-chain hydrocarbons, simultaneously greatly reducing the discharge amount of the CO2 in a process, and improving the overall efficiency and the economical efficiency of the process.

Description

technical field [0001] The invention belongs to a Fischer-Tropsch synthesis reaction process, in particular to a Fischer-Tropsch synthesis reaction process that can effectively reduce carbon dioxide emissions in the coal conversion process. technical background [0002] Whether it is from the perspective of reducing dependence on petroleum route energy and chemical production, or from the perspective of coal clean comprehensive utilization efficiency, Fischer-Tropsch synthesis has become one of the most important energy conversion processes: the synthesis gas obtained from coal gasification is Production of fuels and chemicals under the catalysis of high-efficiency Fischer-Tropsch synthesis catalysts. Process efficiency and low carbon emissions are the main directions of research and development of this process, which requires detailed and thoughtful arrangements and considerations for all aspects of the process. According to the distribution law of ASF of Fischer-Tropsch s...

Claims

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Application Information

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IPC IPC(8): C07C9/04C10G2/00C07C1/04
CPCY02P20/52
Inventor 孙予罕任润厚李德宝郭金刚刘斌冯永发孙志强陈从标
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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