Method for preparing acetylene by cracking coke oven gas with plasma
A technology of plasma and coke oven gas, which is applied in the fields of hydrocarbon cracking to hydrocarbon production, chemical instruments and methods, climate sustainability, etc., to achieve obvious effects of environmental protection and emission reduction, significant economic benefits, and increased production
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Embodiment 1
[0032] Table 1 Coke oven gas components
[0033] Component H 2
CH 4
CO CO 2
N 2
O 2
cH Flow (Nm 3 / h)
V％ 58.6 25.8 7.0 2.0 4.0 0.4 2.2 50000
[0034] The technical process of this embodiment is attached figure 1 : Raw coke oven gas (see Table 1 for composition) 50000Nm 3 / h After purification, enter the pressure swing adsorption device, and separate the hydrogen product 24910Nm 3 / h, PSA tail gas mixed with higher alkynes from the acetylene enrichment unit enters the plasma reactor, and is cracked at 10000V high pressure to generate acetylene and hydrogen, and the acetylene content (vol%) in the cracked gas is 8.8. The cracked gas enters the dilute acetylene enrichment device after extraction cooling and decarbon black purification, and the product acetylene (>99.5%) and higher alkynes are separated through selective absorption to obtain 4.2t / h of acetylene product. Higher alkynes (619Nm 3 / h) return to the plasma...
Embodiment 2
[0038] Table 2 coke oven gas components
[0039] Component H 2
CH 4
CO CO 2
N 2
O 2
cH Flow Nm 3 / h
V％ 58.6 25.8 9.0 2.0 2.0 0.4 2.2 2000
[0040] The technical process of this embodiment is attached figure 2 : Raw coke oven gas (composition see Table 2) 2000Nm 3 / h is mixed with higher alkynes from acetylene concentration and hydrocarbon-rich gas after pressure swing adsorption hydrogen extraction, and then enters the plasma reactor, and is cracked at 10,000V high pressure to generate acetylene, hydrogen and some higher alkynes, and the acetylene in the cracked gas The content (vol%) was 9.6. The pyrolysis gas enters the dilute acetylene enrichment device after being purified by extraction cooling and carbon black removal, and the product acetylene (>99.5%) 0.35t / h and higher alkynes 24.8Nm are separated by selective absorption 3 / h, the higher alkynes return to the plasma reactor to continue cracking; the tail g...
Embodiment 3
[0044] The technical process of this embodiment is attached image 3 : Raw coke oven gas (composition see Table 2) 2000Nm 3 / h is the same as part of the product hydrogen from pressure swing adsorption (100Nm 3 / h) and the PSA hydrocarbon-rich tail gas are mixed together and enter the plasma reactor, where they are cracked at a high pressure of 10000V to generate acetylene, hydrogen and some higher alkynes, and the acetylene content (vol%) in the cracked gas is 8.2. The cracked gas enters the dilute acetylene enrichment device after being purified by extraction and cooling, and carbon black removal, and the product acetylene (>99.5%) 0.37t / h and higher alkyne 20.8Nm are separated by selective absorption 3 / h, the higher alkynes return to the plasma reactor to continue cracking; the tail gas after acetylene enrichment is pressurized by a compressor to 1.5MPa and then directly enters the methanation unit, where CO and CmHn react with hydrogen in the presence of a catalyst to gen...
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