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Self-heating reactor for preparing methane through catalytic hydrogenation of carbon dioxide

A carbon dioxide and catalytic hydrogenation technology, which is applied in the production of hydrocarbons from carbon oxides, chemical instruments and methods, organic chemistry, etc., can solve the problems of poor heat exchange effect, low reaction heat utilization efficiency, complex design, etc. energy consumption, saving cooling energy consumption, and the effect of simple structure

Pending Publication Date: 2021-05-07
上海航天智慧能源技术有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a self-heating carbon dioxide catalytic hydrogenation methane reactor, which can preheat the reaction raw materials by using the methanation reaction heat in situ, reduce the energy consumption of the system, and solve the problems of complex design and replacement in the prior art. Problems such as poor thermal effect and low utilization efficiency of reaction heat

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  • Self-heating reactor for preparing methane through catalytic hydrogenation of carbon dioxide

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Effect test

Embodiment 1

[0027] A factory uses figure 1 The autothermal carbon dioxide catalytic hydrogenation to methane reactor shown: the reactors are connected in parallel; the tubular shell 1 is cylindrical, the length-diameter ratio is 20; the number of reaction tubes 2 in a single reactor is 80, The inner diameter is 20mm; the arrangement of the reaction tube 2 on the upper sealing plate 5 and the lower sealing plate 6 is an equilateral triangle, and the opening rate of the ventilation holes 11 on the upper sealing plate 5 is 20%; The shell 10 of the upper sealing section is an oval head; the shell side 4 is provided with a spiral baffle plate to strengthen the heat exchange between the tube side and the shell side.

[0028] The raw material gas first enters the shell side 4 between the tubular shell 1 and the reaction tube 2, is heated by the reaction tube 2, and then enters the upper sealing section shell 10 through the vent hole 11 Then, the methanation reaction occurs in the tube-side cata...

Embodiment 2

[0030] A factory uses figure 1 The autothermal carbon dioxide catalytic hydrogenation to methane reactor shown: a single reactor is used, the tubular shell 1 is cylindrical, the aspect ratio is 10; the number of reaction tubes 2 in the reactor is 150, and the inner diameter is 30mm The reaction tube 2 is arranged in a square staggered arrangement on the upper sealing plate 5 and the lower sealing plate 6, and the opening rate of the ventilation holes 11 on the upper sealing plate 5 is 12%; The segment shell 10 is a hemispherical head; the shell side 4 is provided with structured packing to strengthen the heat exchange between the tube side and the shell side.

[0031] The raw material gas first enters the shell side 4 between the tubular shell 1 and the reaction tube 2, is heated by the reaction tube 2, and then enters the upper sealing section shell 10 through the vent hole 11 Then, the methanation reaction occurs in the tube-side catalyst of the reaction tube 2, and the mat...

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Abstract

The invention relates to a self-heating reactor for preparing methane by catalytic hydrogenation of carbon dioxide. The reactor comprises a cylindrical tubular shell, the inner space of the shell is divided into three spaces isolated from each other by an upper sealing plate and a lower sealing plate which are parallel to each other; a plurality of parallel reaction tubes are arranged in a reaction section of the tubular shell, the upper ends of tube passes of the reaction tubes communicate with an upper sealing section through corresponding through holes of the upper sealing plate, and the lower ends of the tube passes of the reaction tubes communicate with a lower sealing section through corresponding through holes of the lower sealing plate; the reaction tubes are filled with a solid catalyst; a gap between the tubular shell and the reaction tubes is blocked by the upper sealing plate and the lower sealing plate respectively, so that the gaps among the tubular shell, the reaction tube, the upper sealing plate and the lower sealing plate form a shell pass; a feed gas inlet is formed in the lower part of the reaction section of the tubular shell and communicates with the shell pass; a plurality of vent holes are formed in the part, covering the shell pass, of the upper sealing plate; and a discharge hole is formed in the lower sealing section shell. The reactor is simple in structure and convenient to operate, the purpose of preheating reaction raw materials through methanation reaction heat is achieved, and system energy consumption and operation cost can be effectively reduced.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and in particular relates to a self-heating carbon dioxide catalytic hydrogenation reactor for methane production. Background technique [0002] At present, greenhouse gas emissions represented by carbon dioxide have caused many problems such as global warming, melting glaciers, and rising sea levels. At the same time, the large amount of carbon dioxide also brings serious challenges to global agricultural production and ecosystems. The issue of carbon dioxide emission reduction has become a common topic facing all countries in the world. [0003] On the other hand, due to the unbalanced distribution of natural resources, regions represented by central and western my country are rich in renewable energy sources, such as photovoltaics, wind power, hydropower, etc., but their economic development is relatively backward. wind" etc. Methane is the main component of natural gas and an impo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J8/06C07C1/12C07C9/04
CPCB01J8/067B01J2208/00115C07C1/12C07C9/04
Inventor 刘猛冯毅宋天琦聂旭文李学刚肖文德
Owner 上海航天智慧能源技术有限公司