Novel Heat-Pump-Assisted Extractive Distillation for Bioethanol Purification | |
Luo, Hao1,2; Bildea, Costin Sorin3; Kiss, Anton A.4,5 | |
刊名 | INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH |
2015-02-25 | |
卷号 | 54期号:7页码:2208-2213 |
关键词 | DIVIDING-WALL COLUMN DEHYDRATION TECHNOLOGIES |
ISSN号 | 0888-5885 |
通讯作者 | Kiss, AA (reprint author), AkzoNobel, Proc Technol SRG, Res Dev & Innovat, Zutphenseweg 10, NL-7418 AJ Deventer, Netherlands. |
英文摘要 | The purification of bioethanol fuel involves an energy-intensive separation process to concentrate the diluted streams obtained in the fermentation stage and to overcome the azeotropic behavior of the ethanol-water mixture. The conventional separation sequence employs three distillation columns that carry out several tasks, penalized by high-energy requirements: preconcentration of ethanol, extractive distillation, and solvent recovery. To solve this problem, we propose here a novel heat-pump-assisted extractive distillation process taking place in a dividing-wall column (DWC). In this configuration, the ethanol top vapor stream of the extractive DWC is recompressed from atmospheric pressure to over 3.1 bar (thus to a higher temperature) and used to drive the side reboiler of the DWC, which is responsible for the water vaporization. For a fair comparison with the previously reported studies, we consider here a mixture of 10 wt % ethanol (100 ktpy plant capacity) that is concentrated and dehydrated using ethylene glycol as mass-separating agent. Rigorous process simulations of the proposed vapor recompression (VRC) heat-pump-assisted extractive DWC were carried out in AspenTech Aspen Plus. The results show that the specific energy requirements drop from 2.07 kWh/kg (classic sequence) to only 1.24 kWh/kg ethanol (VRC-assisted extractive DWC); thus, energy savings of over 40% are possible. Considering the requirements for a compressor and use of electricity in the case of the heat-pump-assisted alternative, it is possible to reduce the total annual cost by approximately 24%, despite the 29% increase of the capital expenditures, for the novel process as compared to the optimized conventional separation process. |
学科主题 | Engineering |
WOS标题词 | Science & Technology ; Technology |
类目[WOS] | Engineering, Chemical |
研究领域[WOS] | Engineering |
关键词[WOS] | DIVIDING-WALL COLUMN ; DEHYDRATION ; TECHNOLOGIES |
收录类别 | SCI |
语种 | 英语 |
WOS记录号 | WOS:000350192300028 |
内容类型 | 期刊论文 |
源URL | [http://ir.ipe.ac.cn/handle/122111/13825] |
专题 | 过程工程研究所_研究所(批量导入) |
作者单位 | 1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China 2.Chinese Acad Sci, Sinodanish Ctr Educ & Res, Beijing 100190, Peoples R China 3.Univ Politehn Bucuresti, Bucharest 011061, Romania 4.AkzoNobel, Proc Technol SRG, Res Dev & Innovat, NL-7418 AJ Deventer, Netherlands 5.Univ Twente, Fac Sci & Technol, Sustainable Proc Technol Grp, NL-7500 AE Enschede, Netherlands |
推荐引用方式 GB/T 7714 | Luo, Hao,Bildea, Costin Sorin,Kiss, Anton A.. Novel Heat-Pump-Assisted Extractive Distillation for Bioethanol Purification[J]. INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH,2015,54(7):2208-2213. |
APA | Luo, Hao,Bildea, Costin Sorin,&Kiss, Anton A..(2015).Novel Heat-Pump-Assisted Extractive Distillation for Bioethanol Purification.INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH,54(7),2208-2213. |
MLA | Luo, Hao,et al."Novel Heat-Pump-Assisted Extractive Distillation for Bioethanol Purification".INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH 54.7(2015):2208-2213. |
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