Micro-channel reactor and synthetic gas complete methanation method thereof
A microchannel reactor, complete methanation technology, applied in chemical instruments and methods, laboratory utensils, hydrocarbon production from carbon oxides, etc., to ensure stable operation, shorten assembly and deployment time, and ultra-short contact reaction effects
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Embodiment 1
[0019] Prepare a microchannel reactor, which is composed of a reaction channel, a heat transfer channel, a substrate and a pressure-resistant wall; the reaction channel and the heat transfer channel are located in a high-pressure container in parallel, and the dimensions are equal, that is, length × width × height = 5.5cm × 2cm × 0.08cm, NiO loaded on the substrate on the side of the reaction channel is 5g / m 2 ( figure 1 ).
[0020] In a device containing a microchannel reactor ( figure 2 ), at a reaction temperature of 450°C and a system pressure of 3.0MPa, the synthesis gas H 2 The volume ratio to CO is 3.1, and the volume space velocity of the syngas is 40000h -1 , the amount of water entering the heat transfer channel is 5mL / min, and the reaction is carried out, and then the complete methanation performance of the prepared microchannel reactor is evaluated. Through gas chromatography analysis, the conversion rate of CO was 100%, CH 4 The selectivity was 98.7%.
Embodiment 2
[0022] In a device containing a microchannel reactor ( figure 2 ), use the prepared microchannel reactor in embodiment 1, be 450 ℃ at reaction temperature, system pressure is 3.0MPa, synthesis gas H 2 The volume ratio to CO is 3.0, and the volume space velocity of the syngas is 40000h -1 , the amount of water entering the heat transfer channel is 5mL / min, and the reaction is carried out, and then the complete methanation performance of the prepared microchannel reactor is evaluated. Through gas chromatography analysis, the conversion rate of CO was 99.5%, CH 4 The selectivity was 96.5%.
Embodiment 3
[0024] In a device containing a microchannel reactor ( figure 2 ), use the prepared microchannel reactor in embodiment 1, be 450 ℃ at reaction temperature, system pressure is 3.0MPa, synthesis gas H 2 The volume ratio to CO is 3.1, and the volume space velocity of the syngas is 2000h -1 , into the heat transfer channel under the condition of 1mL / min of water, the reaction was carried out, and then the complete methanation performance of the prepared microchannel reactor was evaluated. Through gas chromatography analysis, the conversion rate of CO was 100%, CH 4 The selectivity is 99.5%.
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