Device and method for producing synthetic gas
A generation device and synthesis gas technology, applied in the direction of gas fuel, electrolysis components, electrolysis process, etc., can solve the problems of complex design, extra cost of cooling system, unsatisfactory control of heat release of isothermal methanation reaction, etc. Achieve the effect of simple design and great flexibility
Pending Publication Date: 2018-04-17
前苏伊士环能集团
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Problems solved by technology
[0050] In the case of methanation in isothermal reactors, the operating pressure does not need to be too high (<20 bar), but a surface arrangement in the catalyst layer is required, which creates additional costs and complex designs associated with the cooling system
[0051] Therefore, the current system cannot control the reaction temperature in the isothermal methanation reactor
[0052] In conclusion, the state of the art of the state of the art does not satisfactorily control the exothermic nature of isothermal methanation reactions and does not give the plant satisfactory flexibility with regard to power fluctuations directly related to power overproduction
Additionally, these prior art techniques require the systematic separation of H 2 and / or CO 2 To meet specifications for injection or use as a substitute for natural gas in the network
[0053] As a result, current systems cannot be sized for injection into natural gas distribution or transmission networks without a hydrogen separation step downstream of the methanation step
Method used
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[0116] The present description is given as a non-limiting example, each feature of an embodiment can be combined in an advantageous manner with any other feature of any other embodiment.
[0117] Note now that the drawings are not to scale.
[0118] Figure 7 A schematic diagram of an example of a system 80 as used in the prior art is shown.
[0119] In these systems 1600, the methanation agent enters a methanation reactor 1605, which may be part of a series of such reactors (not shown).
[0120] From the output of the methanation step, water is separated from the methanation product by means for separating water 1625, such as a heat exchanger.
[0121] The dehydrated synthetic natural gas is then processed through a unit 1645 for separation of carbon dioxide.
[0122] Finally, the synthetic natural gas is processed through a unit 1655 for separating hydrogen such that the synthetic natural gas meets specifications for injection into the natural gas distribution network.
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The invention relates to a synthetic gas production device (1000) which comprises: a water electrolysis means (1105) for producing oxygen and hydrogen; a carbon dioxide supply channel (1110); a means(1115) for injecting hydrogen into a supply channel (1015) supplied with carbon dioxide, said carbon dioxide and said hydrogen forming a syngas; an isothermal methanation reactor comprising: an inlet(1010) intended for the syngas and connected to the syngas supply channel (1015) and an outlet (1020) for synthetic natural gas; a water separation means (1025) comprising: an inlet (1030) for synthetic natural gas and an outlet (1035) for dehydrated synthetic natural gas; and a bypass (1040) for a portion of the dehydrated synthetic natural gas from the outlet of the water separation means to thesyngas supply channel in order to provide a mixture of the bypassed syngas and synthetic natural gas to the reactor.
Description
technical field [0001] The present invention relates to a device and a method for generating synthesis gas, especially suitable for the field of generation of synthetic natural gas or "SNG" (synthetic natural gas). Background technique [0002] Biomethane, known as "SNG" (synthetic natural gas), can be produced by using the Power-to-SNG (abbreviated "P2G") process, which is designed to convert water, CO 2 and electrical energy into a combustible gas of similar quality to natural gas. [0003] In order to obtain a satisfactory economic return, P2G is based on using electricity from renewable sources during periods of excess electricity production. Therefore, methanation technologies require a great deal of operational flexibility in terms of power, flow and processing. [0004] There are several technology options in this area. [0005] The first option consists of direct electrolysis of water in the form of steam and artificial CO 2 to generate CO and H 2 . This conver...
Claims
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IPC IPC(8): C10L3/08C10L3/10C25B1/00
CPCC10L3/08C10L3/104C10L3/106C25B15/08C25B1/00C25B1/04Y02E60/36
Inventor S·福廷Y·卡拉J·里卡德
Owner 前苏伊士环能集团