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A method and device for simultaneously producing hydrogen and liquid fuel

A liquid fuel and fuel reactor technology, which is applied to chemical instruments and methods, preparation of liquid hydrocarbon mixtures, and hydrogen production, etc. The effect of hydrocarbon selectivity, reduction of carbon deposition, and reasonable heat distribution

Active Publication Date: 2018-04-10
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Fischer-Tropsch synthesis is a strongly exothermic reaction, and the accumulated heat not only reduces the selectivity of hydrocarbons, but also causes carbon deposition and crushing of the catalyst, and the bed temperature rises rapidly.

Method used

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  • A method and device for simultaneously producing hydrogen and liquid fuel
  • A method and device for simultaneously producing hydrogen and liquid fuel

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preparation example Construction

[0029] The preparation method of catalyst in the embodiment:

[0030] Weigh 40g Fe(NO 3 ) 3 9H 2 O was dissolved in 200mL of distilled water, stirred evenly, 130g of zirconia powder was taken, evaporated to dryness at 50°C with a rotary evaporator, and then o C drying 12h, at 900 o C was roasted for 4h to obtain Fe 2 o 3 / ZrO 2 Oxygen carrier, where Fe 2 o 3 The mass content is 15%.

[0031] Weigh 29g Ni(NO 3 )2 ·6H 2 O was dissolved in 200mL of distilled water, stirred evenly, 130g of silicon oxide was taken, evaporated to dryness at 50°C with a rotary evaporator, and then o C drying 12h, at 900 o C roasting for 4h to obtain NiO / SiO 2 Oxygen carrier, in which the mass content of NiO is 10%.

Embodiment 1

[0033] Place 15gFe in the upper part of the fuel reactor 2 o 3 / ZrO 2 Catalyst, place 25gNiO / SiO in the lower section 2 Catalyst, separated by a screen to allow CO, H 2 and CH 4 pass. The start-up temperature of the lower section of the fuel reactor is 800°C, the upper section has only the heat preservation part and no heating part, and the pressure of the upper section is controlled at 2MPa. The air reactor temperature was controlled at 500°C. The temperature of the hydrogen production reactor is controlled at 750°C. The methane gas flow rate is 100 mL / min, the air flow rate is 50 mL / min, and the water flow rate is 10 mL / min.

Embodiment 2

[0035] Place 15gFe in the upper part of the fuel reactor 2 o 3 / ZrO 2 Catalyst, place 25gNiO / SiO in the lower section 2 Catalyst, separated by a screen to allow CO, H 2 and CH 4 pass. The start-up temperature of the lower section of the fuel reactor is 950°C, the upper section has only the heat preservation part and no heating part, and the pressure of the upper section is controlled at 2MPa. The air reactor temperature was controlled at 500°C. The temperature of the hydrogen production reactor is controlled at 750°C. The methane gas flow rate is 100 mL / min, the air flow rate is 50 mL / min, and the water flow rate is 10 mL / min.

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Abstract

The present invention discloses a method and an apparatus for simultaneously preparing hydrogen and a liquid-state fuel. The method comprises that air enters an air reactor, and reacts with Ni to generate NiO and oxygen-less gas, wherein the high-temperature oxygen-less gas is discharged from the top portion of the reactor so as to be directly used for electricity generation; the NiO enters a fuel reactor, and the NiO and methane introduced from the bottom portion are subjected to an oxidation reduction reaction on the lower portion of the fuel reactor to generate CO, H2 and Ni, wherein the Ni is recycled back to the air in the reactor; the CO, the H2 and the unconverted CH4 enter the upper portion of the reactor through a screen mesh arranged on the middle portion of the reactor, and the CO, the H2, the unconverted CH4 and a Fe2O3 catalyst are subjected to a Fischer-Tropsch synthesis reaction to generate a liquid-state fuel and Fe; and the liquid-state fuel outflows from the top portion of the reactor, and the Fe enters a hydrogen production reactor, and reacts with water vapor introduced from the bottom portion of the reactor to generate hydrogen and Fe3O4, wherein the hydrogen is discharged from the top portion of the reactor so as to be collected, and the Fe3O4 returns to the upper portion of the fuel reactor so as to be subjected to a Fischer-Tropsch synthesis reaction. With the method of the present invention, the self-thermal equilibrium of the whole system can be achieved, the gas separation device can be eliminated, the catalyst can achieve the two purposes, and the high-purity hydrogen can be directly produced.

Description

technical field [0001] The invention relates to a method and device for simultaneously producing hydrogen and liquid fuel. Background technique [0002] With the rapid development of social economy and the enhancement of people's awareness of environmental protection, the society's demand for hydrogen energy is increasing, and natural gas is rich in a large amount of methane gas. It has become a worldwide research to directly convert methane into more valuable hydrogen. hotspot. The future hydrogen production technology not only requires high hydrogen production efficiency and high hydrogen purity, but also has the characteristics of reducing greenhouse gas emissions. At present, most of the hydrogen in the world is provided by the hydrogen production process of methane steam reforming. After the reforming, the hydrogen is purified through water gas shift, pressure swing adsorption and other processes. The whole process is long, and the pressure swing adsorption can enrich ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B3/02C01B3/10C10G2/00
CPCY02E60/36
Inventor 梁皓孙兆松尹泽群刘全杰
Owner CHINA PETROLEUM & CHEM CORP
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