Carbon emission-free one-step method and equipment for synthesizing artificial natural gas
A natural gas and carbon emission technology, applied in the field of chemical engineering, can solve the problems of reducing and increasing power consumption and increasing the number of equipment
Active Publication Date: 2015-04-08
杭州林达化工技术工程有限公司
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Problems solved by technology
PRIOR ART Conventional methods of temperature control during methanation reactions require the use of complex devices including multiple heat exchangers and gas cyclers to cool the effluent gas and prevent overheating of the methanation reactor, as recently disclosed by Casale Co. The Chinese patent CN101560423A applied for, application number 200910135203 (see attached figure 1 ), and at the same time, the fresh gas is synthesized and fed into the adiabatic reactor in parallel, using an adiabatic reactor and an external heat exchanger, and multiple units are connected in series for the methanation reaction, due to CO or CO 2 Add H 2 The heat of the methanation reaction is very large, so one is to use the method of reaction-heat exchange cooling-reaction alternately, which increases the number of equipment. Even so, the temperature of the tower gas is as high as 600°C; The CO content of the methanation reaction gas is used to control the reaction heat, which increases the power consumption
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Embodiment 1
[0038] Embodiment 1: use the coke oven gas of serial number 1 in the following table 2 and the composition of the syngas produced by Texaco water slurry gas production of serial number 2, calculate 1000mol coke oven gas according to the above formula and use Xmol water gas to make 1000mol +Xmol of mixed gas No. 3, passed through the methanation reactor of this patent equipped with a nickel catalyst with a space velocity of 4000 under 1.5MPa, enters the tower at an inlet temperature of 260°C, and exits the tower at a temperature of 296°C. The methanation reaction is cooled and separated to obtain No. 4. Artificial natural gas 470mol, at the same time get 1.62 tons / km 3 By-product steam.
[0039] Schedule 2
[0040]
[0041] Product gas calorific value 31.4MJ / M 3 , The product gas specification complies with the requirements of my country's national standards for natural gas and compressed natural gas GB17820-1999 and GB18047-2000.
[0042] Beneficial effect
[0043] Co...
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The invention discloses a method for preparing synthetic natural gas from coal-formed gas, coke-oven gas and the like through methanation one-step reaction. The method is characterized in that: in the production of the synthetic artificial natural gas, CO2 emission is avoided, namely the artificial natural gas is synthesized at zero carbon emission, the flow is simple, a few pieces of equipment is arranged, the temperature resistance requirement of a methanation catalyst is low, no recycle or a low recycle ratio is achieved, and electricity is saved.
Description
technical field [0001] The invention relates to a method and equipment for synthesizing artificial natural gas in one step without carbon emission, belonging to the field of chemical engineering. Background technique [0002] Synthesis gas is produced from coal gasification, and the H 2 , CO, CO 2 Various artificial natural gas can be produced by methanation reaction, the reaction formula is as follows: [0003] CO+3H 2 =CH 4 +H 2 O +206KJ / mol (1) [0004] CO 2 +4H 2 =CH 4 +2H 2 O +165KJ / mol (2) [0005] Since the methanation reactions (1) and (2) are strong exothermic reactions, the temperature in the methanation reactor must be controlled during the methanation of syngas to prevent overheating of the catalyst in the reactor. Furthermore, since methane formation is favored at low temperatures, high temperatures are unfavorable from an equilibrium point of view, reducing the conversion of syngas to methane. PRIOR ART Conventional methods of temperature control du...
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IPC IPC(8): C10L3/08
Inventor 楼韧楼寿林
Owner 杭州林达化工技术工程有限公司