CIESC Journal ›› 2020, Vol. 71 ›› Issue (4): 1657-1665.DOI: 10.11949/0438-1157.20191392
• Separation engineering • Previous Articles Next Articles
Song HU1(),Jinlong LI2,Weisheng YANG1()
Received:
2019-11-15
Revised:
2020-01-07
Online:
2020-04-05
Published:
2020-04-05
Contact:
Weisheng YANG
通讯作者:
杨卫胜
作者简介:
胡松(1983—),男,博士,高工,基金资助:
CLC Number:
Song HU, Jinlong LI, Weisheng YANG. Propylene oxide offgas recovery and purification process with methanol solvent[J]. CIESC Journal, 2020, 71(4): 1657-1665.
胡松, 李进龙, 杨卫胜. 环氧丙烷尾气甲醇吸收及纯化工艺[J]. 化工学报, 2020, 71(4): 1657-1665.
N2-PO | N2-CH3OH | PO-CH3OH | H2O-CH3OH | H2O-PO | CH3CHO-CH3OH | CH3OOCH-CH3OH |
---|---|---|---|---|---|---|
-1.59 | -0.42 | -7.89 | -15.35 | -13.60 | -13.47 | -3.46 |
Table 1 Binding energies of different components/(kJ/mol)
N2-PO | N2-CH3OH | PO-CH3OH | H2O-CH3OH | H2O-PO | CH3CHO-CH3OH | CH3OOCH-CH3OH |
---|---|---|---|---|---|---|
-1.59 | -0.42 | -7.89 | -15.35 | -13.60 | -13.47 | -3.46 |
Unit block | Parameter | Value |
---|---|---|
absorption column (OAC) | operating pressure | 180 kPa |
operating temperature | 20.0℃ | |
theoretical stage | 12 | |
feed stage of PO offgas | 12 | |
temperature of solvent | 20.0℃ | |
solvent ratio | 1.0 | |
extractive distillation column (EDC) | operating pressure | 50 kPa |
theoretical stage | 54 | |
feed stage of solvent | 26 | |
feed stage of crude PO | 44 | |
solvent ratio(mass) | 0.12 | |
reflux ratio(mass) | 2.9 | |
methanol recovery column (MRC) | operating pressure | 20 kPa |
theoretical stage | 42 | |
feed stage of feeding | 20 | |
stage of side product | 24 | |
reflux ratio(mass) | 2.2 | |
azeotropic distillation column (ADC) | operating pressure | 20 kPa |
theoretical stage | 11 | |
stage of feeding | 5 | |
solvent ratio(mass) | 6.72 |
Table 2 Optimization parameters for flowsheet simulation
Unit block | Parameter | Value |
---|---|---|
absorption column (OAC) | operating pressure | 180 kPa |
operating temperature | 20.0℃ | |
theoretical stage | 12 | |
feed stage of PO offgas | 12 | |
temperature of solvent | 20.0℃ | |
solvent ratio | 1.0 | |
extractive distillation column (EDC) | operating pressure | 50 kPa |
theoretical stage | 54 | |
feed stage of solvent | 26 | |
feed stage of crude PO | 44 | |
solvent ratio(mass) | 0.12 | |
reflux ratio(mass) | 2.9 | |
methanol recovery column (MRC) | operating pressure | 20 kPa |
theoretical stage | 42 | |
feed stage of feeding | 20 | |
stage of side product | 24 | |
reflux ratio(mass) | 2.2 | |
azeotropic distillation column (ADC) | operating pressure | 20 kPa |
theoretical stage | 11 | |
stage of feeding | 5 | |
solvent ratio(mass) | 6.72 |
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