Knowledge Management System Of Guangzhou Institute of Energy Conversion, CAS
| Ultrasonic Preparation of Emulsions Derived from Aqueous Bio-oil Fraction and 0# Diesel and Combustion Characteristics in Diesel Generator | |
Li, Yuping; Wang, Tiejun ; Liang, Wei; Wu, Chuangzhi; Ma, Longlong; Zhang, Qi; Zhang, Xinghua; Jiang, Ting
| |
| 2010-03-01 | |
| 发表期刊 | ENERGY & FUELS
 |
| ISSN | 0887-0624 |
| 卷号 | 24页码:1987-1995 |
| 产权排序 | [Li, Yuping; Wang, Tiejun; Liang, Wei; Wu, Chuangzhi; Ma, Longlong; Zhang, Qi; Zhang, Xinghua; Jiang, Ting] Chinese Acad Sci, Guangzhou Inst Energy Convers, Key Lab Renewable Energy & Gas Hydrate, Guangzhou 510640, Peoples R China |
| 通讯作者 | wangtj@ms.giec.ac.cn |
| 摘要 | Preparation of emulsions from aqueous fractions of biomass pyrolysis liquid (bio-oil) and 0# diesel was studied under ultrasonic power. The thermogravimetric analysis and combustion characteristics of the optimized emulsions in a particular diesel generator were also investigated. The results show that the mass ratio of aqueous bio-oil fraction to 0# diesel affected the emulsion stability greatly, by factor analysis method, and the optimized emulsion was not stratified for 30 days when the ratio was 1:9 under the following conditions: water:bio-oil mass ratio, 2:1; ultrasonic time, 120 min; formula emulsifier addition (Span-80:Tween-80:Tween-20:n-octanol ratio = 72:9:9:10, wt %), 3 wt % (which was longer than that prepared by mechanical agitation). The density and heat value of the nonstratified emulsions (after 30 days) were similar with those of 0# diesel, because of the low aqueous bio-oil fraction content and wit diesel dilution; however, an increase of more than 38.4% in the dynamic viscosity and a decrease in pH from 5.26 to <3 may result from the concentrated polar oxygenates and carbohydrates in aqueous bio-oil fraction, which were further solubilized in water-in-oil (W/O) emulsion droplets. In addition, ultrasonic emulsification resulted in entropy augmentation and equilibrium tendencies (by thermodynamic analysis). Thermogravimetric analysis of the emulsion shows that there is a weight loss peak that is attributed to residual carbon combustion above 400 degrees C, in addition to a similar hydrocarbon vaporization peak at 180 degrees C with diesel. The existence of residual carbon and the high viscosity of the emulsion might have caused inefficient combustion when the output power of diesel generator was above 1400 W with high feeding amount, which also resulted in higher exhaust gas temperature than diesel feedstock, although microexplosion may have occurred. Moreover, when the output power increased to 1600 W with the emulsion used, the O(2) and NO(x) emissions decreased 21% and 87.2%, respectively, the CO(2) emission increased 13.3%, and the CO and SO(2) emissions increased quickly to 5124 ppm and 59 ppm, respectively, compared with pure diesel. The corrosion and blockage caused by coking of the injector were obvious. |
| 文章类型 | Article |
| 其他摘要 | Preparation of emulsions from aqueous fractions of biomass pyrolysis liquid (bio-oil) and 0# diesel was studied under ultrasonic power. The thermogravimetric analysis and combustion characteristics of the optimized emulsions in a particular diesel generator were also investigated. The results show that the mass ratio of aqueous bio-oil fraction to 0# diesel affected the emulsion stability greatly, by factor analysis method, and the optimized emulsion was not stratified for 30 days when the ratio was 1:9 under the following conditions: water:bio-oil mass ratio, 2:1; ultrasonic time, 120 min; formula emulsifier addition (Span-80:Tween-80:Tween-20:n-octanol ratio = 72:9:9:10, wt %), 3 wt % (which was longer than that prepared by mechanical agitation). The density and heat value of the nonstratified emulsions (after 30 days) were similar with those of 0# diesel, because of the low aqueous bio-oil fraction content and wit diesel dilution; however, an increase of more than 38.4% in the dynamic viscosity and a decrease in pH from 5.26 to <3 may result from the concentrated polar oxygenates and carbohydrates in aqueous bio-oil fraction, which were further solubilized in water-in-oil (W/O) emulsion droplets. In addition, ultrasonic emulsification resulted in entropy augmentation and equilibrium tendencies (by thermodynamic analysis). Thermogravimetric analysis of the emulsion shows that there is a weight loss peak that is attributed to residual carbon combustion above 400 degrees C, in addition to a similar hydrocarbon vaporization peak at 180 degrees C with diesel. The existence of residual carbon and the high viscosity of the emulsion might have caused inefficient combustion when the output power of diesel generator was above 1400 W with high feeding amount, which also resulted in higher exhaust gas temperature than diesel feedstock, although microexplosion may have occurred. Moreover, when the output power increased to 1600 W with the emulsion used, the O(2) and NO(x) emissions decreased 21% and 87.2%, respectively, the CO(2) emission increased 13.3%, and the CO and SO(2) emissions increased quickly to 5124 ppm and 59 ppm, respectively, compared with pure diesel. The corrosion and blockage caused by coking of the injector were obvious. |
| 关键词 | Biomass Pyrolysis Liquid Emission Characteristics Hydrogen-production Part 1 Catalysts Fuel Emulsification Engines Performance Surfactant |
| 学科领域 | Energy & Fuels ; Engineering |
| WOS标题词 | Science & Technology ; Technology |
| DOI | 10.1021/ef9010934 |
| 研究领域[WOS] | Energy & Fuels ; Engineering |
| URL | 查看原文 |
| 关键词[WOS] | BIOMASS PYROLYSIS LIQUID ; EMISSION CHARACTERISTICS ; HYDROGEN-PRODUCTION ; PART 1 ; CATALYSTS ; FUEL ; EMULSIFICATION ; ENGINES ; PERFORMANCE ; SURFACTANT |
| 收录类别 | SCI |
| 语种 | 英语 |
| 项目资助者 | National Natural Research Foundation [50776092]; National High Technology Research, Development Program of China [2007AA05Z416] |
| WOS类目 | Energy & Fuels ; Engineering, Chemical |
| WOS记录号 | WOS:000276563100066 |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.giec.ac.cn/handle/344007/8513 |
| 专题 | 中国科学院广州能源研究所 生物质能源 生物质化工品制备实验室 |
| 作者单位 | Chinese Acad Sci, Guangzhou Inst Energy Convers, Key Lab Renewable Energy & Gas Hydrate, Guangzhou 510640, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Yuping,Wang, Tiejun,Liang, Wei,et al. Ultrasonic Preparation of Emulsions Derived from Aqueous Bio-oil Fraction and 0# Diesel and Combustion Characteristics in Diesel Generator[J]. ENERGY & FUELS,2010,24:1987-1995. |
| APA | Li, Yuping.,Wang, Tiejun.,Liang, Wei.,Wu, Chuangzhi.,Ma, Longlong.,...&Jiang, Ting.(2010).Ultrasonic Preparation of Emulsions Derived from Aqueous Bio-oil Fraction and 0# Diesel and Combustion Characteristics in Diesel Generator.ENERGY & FUELS,24,1987-1995. |
| MLA | Li, Yuping,et al."Ultrasonic Preparation of Emulsions Derived from Aqueous Bio-oil Fraction and 0# Diesel and Combustion Characteristics in Diesel Generator".ENERGY & FUELS 24(2010):1987-1995. |
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