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Bio-oil upgrading by emulsification/microemulsification: A review

Author

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  • Leng, Lijian
  • Li, Hui
  • Yuan, Xingzhong
  • Zhou, Wenguang
  • Huang, Huajun

Abstract

Bio-oil, which is produced from pyrolysis and hydrothermal liquefaction of biomass, is becoming one of the most promising renewable and sustainable fuels to replace fossil fuels. It is clean and environmentally benign with some fuel properties similar to petrodiesel. However, the poor fuel properties of bio-oil such as high water content, low pH, and high viscosity challenge its direct application as a fuel in diesel engines. This paper presents the fuel properties of bio-oil from different biomass produced by pyrolysis or hydrothermal liquefaction under varied conditions. Then a comprehensive review and discussion is provided on upgrading of bio-oil by emulsification/microemulsification with diesel and biodiesel or their mixtures. The review finds that most fuel properties of bio-oil can be improved considerably after upgradation, and the resultant emulsion/microemulsion hybrid fuel can be used on diesel engines with reduced emissions of some pollutants. However, there are still many issues remain to be resolved, e.g., the stability and acidity (corrosivity) of the fuel system, before this bio-oil upgrading technology can be scaled up and commercialized. Strategies such as pretreatment of bio-oil, optimization of the use of base oil, surfactant, co-surfactant, and additives, and the selection of emulsion/microemulsion preparation methods should be further investigated for enhancing bio-oil upgrading by emulsification/microemulsification.

Suggested Citation

  • Leng, Lijian & Li, Hui & Yuan, Xingzhong & Zhou, Wenguang & Huang, Huajun, 2018. "Bio-oil upgrading by emulsification/microemulsification: A review," Energy, Elsevier, vol. 161(C), pages 214-232.
    • Handle: RePEc:eee:energy:v:161:y:2018:i:c:p:214-232
    DOI: 10.1016/j.energy.2018.07.117
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    as
    1. Fonts, Isabel & Gea, Gloria & Azuara, Manuel & Ábrego, Javier & Arauzo, Jesús, 2012. "Sewage sludge pyrolysis for liquid production: A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 16(5), pages 2781-2805.
    2. Lin, Yung-Sung & Lin, Hai-Ping, 2010. "Study on the spray characteristics of methyl esters from waste cooking oil at elevated temperature," Renewable Energy, Elsevier, vol. 35(9), pages 1900-1907.
    3. Leng, Lijian & Han, Pei & Yuan, Xingzhong & Li, Jun & Zhou, Wenguang, 2018. "Biodiesel microemulsion upgrading and thermogravimetric study of bio-oil produced by liquefaction of different sludges," Energy, Elsevier, vol. 153(C), pages 1061-1072.
    4. Yuan, Xingzhong & Ding, Xiaowei & Leng, Lijian & Li, Hui & Shao, Jianguang & Qian, Yingying & Huang, Huajun & Chen, Xiaohong & Zeng, Guangming, 2018. "Applications of bio-oil-based emulsions in a DI diesel engine: The effects of bio-oil compositions on engine performance and emissions," Energy, Elsevier, vol. 154(C), pages 110-118.
    5. Huang, Hua-jun & Yuan, Xing-zhong & Zhu, Hui-na & Li, Hui & Liu, Yan & Wang, Xue-li & Zeng, Guang-ming, 2013. "Comparative studies of thermochemical liquefaction characteristics of microalgae, lignocellulosic biomass and sewage sludge," Energy, Elsevier, vol. 56(C), pages 52-60.
    6. Guo, Yang & Yeh, Thomas & Song, Wenhan & Xu, Donghai & Wang, Shuzhong, 2015. "A review of bio-oil production from hydrothermal liquefaction of algae," Renewable and Sustainable Energy Reviews, Elsevier, vol. 48(C), pages 776-790.
    7. Hagos, Ftwi Y. & Ali, Obed M. & Mamat, Rizalman & Abdullah, Abdul A., 2017. "Effect of emulsification and blending on the oxygenation and substitution of diesel fuel for compression ignition engine," Renewable and Sustainable Energy Reviews, Elsevier, vol. 75(C), pages 1281-1294.
    8. Toor, Saqib Sohail & Rosendahl, Lasse & Rudolf, Andreas, 2011. "Hydrothermal liquefaction of biomass: A review of subcritical water technologies," Energy, Elsevier, vol. 36(5), pages 2328-2342.
    9. Reham, S.S. & Masjuki, H.H. & Kalam, M.A. & Shancita, I. & Rizwanul Fattah, I.M. & Ruhul, A.M., 2015. "Study on stability, fuel properties, engine combustion, performance and emission characteristics of biofuel emulsion," Renewable and Sustainable Energy Reviews, Elsevier, vol. 52(C), pages 1566-1579.
    10. Yang, W.M. & An, H. & Chou, S.K. & Chua, K.J. & Mohan, B. & Sivasankaralingam, V. & Raman, V. & Maghbouli, A. & Li, J., 2013. "Impact of emulsion fuel with nano-organic additives on the performance of diesel engine," Applied Energy, Elsevier, vol. 112(C), pages 1206-1212.
    11. de Luna, Mark Daniel G. & Cruz, Louie Angelo D. & Chen, Wei-Hsin & Lin, Bo-Jhih & Hsieh, Tzu-Hsien, 2017. "Improving the stability of diesel emulsions with high pyrolysis bio-oil content by alcohol co-surfactants and high shear mixing strategies," Energy, Elsevier, vol. 141(C), pages 1416-1428.
    12. Debnath, Biplab K. & Saha, Ujjwal K. & Sahoo, Niranjan, 2015. "A comprehensive review on the application of emulsions as an alternative fuel for diesel engines," Renewable and Sustainable Energy Reviews, Elsevier, vol. 42(C), pages 196-211.
    13. Wang, Tengfei & Zhai, Yunbo & Zhu, Yun & Li, Caiting & Zeng, Guangming, 2018. "A review of the hydrothermal carbonization of biomass waste for hydrochar formation: Process conditions, fundamentals, and physicochemical properties," Renewable and Sustainable Energy Reviews, Elsevier, vol. 90(C), pages 223-247.
    14. Kan, Tao & Strezov, Vladimir & Evans, Tim J., 2016. "Lignocellulosic biomass pyrolysis: A review of product properties and effects of pyrolysis parameters," Renewable and Sustainable Energy Reviews, Elsevier, vol. 57(C), pages 1126-1140.
    15. Rajasekar, E. & Murugesan, A. & Subramanian, R. & Nedunchezhian, N., 2010. "Review of NOx reduction technologies in CI engines fuelled with oxygenated biomass fuels," Renewable and Sustainable Energy Reviews, Elsevier, vol. 14(7), pages 2113-2121, September.
    16. Saber, Mohammad & Nakhshiniev, Bakhtiyor & Yoshikawa, Kunio, 2016. "A review of production and upgrading of algal bio-oil," Renewable and Sustainable Energy Reviews, Elsevier, vol. 58(C), pages 918-930.
    17. Prakash, R. & Singh, R.K. & Murugan, S., 2013. "Experimental investigation on a diesel engine fueled with bio-oil derived from waste wood–biodiesel emulsions," Energy, Elsevier, vol. 55(C), pages 610-618.
    18. Lin, Bo-Jhih & Chen, Wei-Hsin & Budzianowski, Wojciech M. & Hsieh, Cheng-Ting & Lin, Pei-Hsun, 2016. "Emulsification analysis of bio-oil and diesel under various combinations of emulsifiers," Applied Energy, Elsevier, vol. 178(C), pages 746-757.
    19. Chiaramonti, David & Oasmaa, Anja & Solantausta, Yrjö, 2007. "Power generation using fast pyrolysis liquids from biomass," Renewable and Sustainable Energy Reviews, Elsevier, vol. 11(6), pages 1056-1086, August.
    20. Van de Beld, Bert & Holle, Elmar & Florijn, Jan, 2013. "The use of pyrolysis oil and pyrolysis oil derived fuels in diesel engines for CHP applications," Applied Energy, Elsevier, vol. 102(C), pages 190-197.
    21. Lehto, Jani & Oasmaa, Anja & Solantausta, Yrjö & Kytö, Matti & Chiaramonti, David, 2014. "Review of fuel oil quality and combustion of fast pyrolysis bio-oils from lignocellulosic biomass," Applied Energy, Elsevier, vol. 116(C), pages 178-190.
    22. Xiu, Shuangning & Shahbazi, Abolghasem, 2012. "Bio-oil production and upgrading research: A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 16(7), pages 4406-4414.
    23. Yang, S.I. & Hsu, T.C. & Wu, C.Y. & Chen, K.H. & Hsu, Y.L. & Li, Y.H., 2014. "Application of biomass fast pyrolysis part II: The effects that bio-pyrolysis oil has on the performance of diesel engines," Energy, Elsevier, vol. 66(C), pages 172-180.
    24. Lanjekar, R.D. & Deshmukh, D., 2016. "A review of the effect of the composition of biodiesel on NOx emission, oxidative stability and cold flow properties," Renewable and Sustainable Energy Reviews, Elsevier, vol. 54(C), pages 1401-1411.
    25. Lai, Fa-ying & Chang, Yan-chao & Huang, Hua-jun & Wu, Guo-qiang & Xiong, Jiang-bo & Pan, Zi-qian & Zhou, Chun-fei, 2018. "Liquefaction of sewage sludge in ethanol-water mixed solvents for bio-oil and biochar products," Energy, Elsevier, vol. 148(C), pages 629-641.
    26. Akhtar, Javaid & Saidina Amin, NorAishah, 2012. "A review on operating parameters for optimum liquid oil yield in biomass pyrolysis," Renewable and Sustainable Energy Reviews, Elsevier, vol. 16(7), pages 5101-5109.
    27. Krutof, Anke & Hawboldt, Kelly, 2016. "Blends of pyrolysis oil, petroleum, and other bio-based fuels: A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 59(C), pages 406-419.
    28. Hasannuddin, A.K. & Yahya, W.J. & Sarah, S. & Ithnin, A.M. & Syahrullail, S. & Sugeng, D.A. & Razak, I.F.A. & Abd Fatah, A.Y. & Aqma, W.S. & Rahman, A.H.A. & Ramlan, N.A., 2018. "Performance, emissions and carbon deposit characteristics of diesel engine operating on emulsion fuel," Energy, Elsevier, vol. 142(C), pages 496-506.
    29. Liang, Jie & Qian, Yingying & Yuan, Xingzhong & Leng, Lijian & Zeng, Guangming & Jiang, Longbo & Shao, Jianguang & Luo, Yuan & Ding, Xiaowei & Yang, Zhaoxue & Li, Xuemei, 2018. "Span80/Tween80 stabilized bio-oil-in-diesel microemulsion: Formation and combustion," Renewable Energy, Elsevier, vol. 126(C), pages 774-782.
    30. Kumar, Satish & Cho, Jae Hyun & Park, Jaedeuk & Moon, Il, 2013. "Advances in diesel–alcohol blends and their effects on the performance and emissions of diesel engines," Renewable and Sustainable Energy Reviews, Elsevier, vol. 22(C), pages 46-72.
    31. Dwivedi, Gaurav & Sharma, M.P., 2014. "Impact of cold flow properties of biodiesel on engine performance," Renewable and Sustainable Energy Reviews, Elsevier, vol. 31(C), pages 650-656.
    32. Yang, Y. & Brammer, J.G. & Samanya, J. & Hossain, A.K. & Hornung, A., 2013. "Investigation into the performance and emissions of a stationary diesel engine fuelled by sewage sludge intermediate pyrolysis oil and biodiesel blends," Energy, Elsevier, vol. 62(C), pages 269-276.
    33. Leng, Lijian & Yuan, Xingzhong & Chen, Xiaohong & Huang, Huajun & Wang, Hou & Li, Hui & Zhu, Ren & Li, Shanxing & Zeng, Guangming, 2015. "Characterization of liquefaction bio-oil from sewage sludge and its solubilization in diesel microemulsion," Energy, Elsevier, vol. 82(C), pages 218-228.
    34. Vladimir Alvarado & Xiuyu Wang & Mehrnoosh Moradi, 2011. "Stability Proxies for Water-in-Oil Emulsions and Implications in Aqueous-based Enhanced Oil Recovery," Energies, MDPI, vol. 4(7), pages 1-29, July.
    35. Yuan, Xingzhong & Wang, Jingyu & Zeng, Guangming & Huang, Huajun & Pei, Xiaokai & Li, Hui & Liu, Zhifeng & Cong, Minghui, 2011. "Comparative studies of thermochemical liquefaction characteristics of microalgae using different organic solvents," Energy, Elsevier, vol. 36(11), pages 6406-6412.
    36. Guo, Zuogang & Wang, Shurong & Wang, Xiangyu, 2014. "Stability mechanism investigation of emulsion fuels from biomass pyrolysis oil and diesel," Energy, Elsevier, vol. 66(C), pages 250-255.
    37. Chang, Yu-Cheng & Lee, Wen-Jhy & Lin, Sheng-Lun & Wang, Lin-Chi, 2013. "Green energy: Water-containing acetone–butanol–ethanol diesel blends fueled in diesel engines," Applied Energy, Elsevier, vol. 109(C), pages 182-191.
    38. Hasannuddin, A.K. & Wira, J.Y. & Sarah, S. & Ahmad, M.I. & Aizam, S.A. & Aiman, M.A.B. & Watanabe, S. & Hirofumi, N. & Azrin, M.A., 2016. "Durability studies of single cylinder diesel engine running on emulsion fuel," Energy, Elsevier, vol. 94(C), pages 557-568.
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