Dual-fuel strategies can enable replacement of diesel fuel with low reactivity biofuels like hydrous ethanol. Previous work has shown that dual-fuel strategies using port injection of hydrous ethanol can replace up to 60% of diesel fuel on an energy basis. However, they yield negligible benefits in NOX emissions, soot emissions, and brake thermal efficiency (BTE) over conventional single fuel diesel operation. Pretreatment of hydrous ethanol through steam reforming before mixing with intake air offers the potential to both increase BTE and decrease soot and NOX emissions. Steam reforming can upgrade the heating value of the secondary fuel through thermochemical recuperation (TCR) and produces inert gases to act as a diluent similar to exhaust gas recirculation. This study experimentally investigated a novel thermally integrated steam reforming TCR reactor that uses sensible and chemical energy in the exhaust to provide the necessary heat for hydrous ethanol steam reforming. An off-highway diesel engine was operated at three speed and load settings with varying hydrous ethanol flow rates reaching fumigant energy fractions of up to 70%. The engine achieved soot reductions of close to 90% and minor NOX reductions; however, carbon monoxide and unburned hydrocarbon emissions increased. A first law energy balance using the experimental data shows that the developed TCR system effectively upgraded the heating value of the secondary fuel. Overall, hydrous ethanol steam reforming using TCR can lead to 23% increase in fuel heating value at 100% conversion, a limit approached in the conducted experiments.
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Huazhong Univ Sci & Technol, State Key Lab Coal Combust, Wuhan 430074, Peoples R China
Huazhong Univ Sci & Technol, Sch Energy & Power Engn, Wuhan 430074, Peoples R ChinaHuazhong Univ Sci & Technol, State Key Lab Coal Combust, Wuhan 430074, Peoples R China
Zhang, Jie
Zhao, Zhonghui
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Huazhong Univ Sci & Technol, State Key Lab Coal Combust, Wuhan 430074, Peoples R China
Huazhong Univ Sci & Technol, Sch Energy & Power Engn, Wuhan 430074, Peoples R ChinaHuazhong Univ Sci & Technol, State Key Lab Coal Combust, Wuhan 430074, Peoples R China
Zhao, Zhonghui
Elbanna, Ahmed Mohammed
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Huazhong Univ Sci & Technol, Sch Energy & Power Engn, Wuhan 430074, Peoples R China
Tanta Univ, Fac Engn, Mech Power Engn Dept, Tanta 31521, EgyptHuazhong Univ Sci & Technol, State Key Lab Coal Combust, Wuhan 430074, Peoples R China
Elbanna, Ahmed Mohammed
Dong, Shijun
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Huazhong Univ Sci & Technol, State Key Lab Coal Combust, Wuhan 430074, Peoples R China
Huazhong Univ Sci & Technol, Sch Energy & Power Engn, Wuhan 430074, Peoples R ChinaHuazhong Univ Sci & Technol, State Key Lab Coal Combust, Wuhan 430074, Peoples R China
Dong, Shijun
Wang, Shengdong
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Huazhong Univ Sci & Technol, Sch Energy & Power Engn, Wuhan 430074, Peoples R ChinaHuazhong Univ Sci & Technol, State Key Lab Coal Combust, Wuhan 430074, Peoples R China
Wang, Shengdong
Ouyang, Weihao
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Huazhong Univ Sci & Technol, State Key Lab Coal Combust, Wuhan 430074, Peoples R China
Huazhong Univ Sci & Technol, Sch Energy & Power Engn, Wuhan 430074, Peoples R ChinaHuazhong Univ Sci & Technol, State Key Lab Coal Combust, Wuhan 430074, Peoples R China
Ouyang, Weihao
Zhang, Congduo
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Huazhong Univ Sci & Technol, Sch Energy & Power Engn, Wuhan 430074, Peoples R ChinaHuazhong Univ Sci & Technol, State Key Lab Coal Combust, Wuhan 430074, Peoples R China
Zhang, Congduo
Cheng, Xiaobei
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Huazhong Univ Sci & Technol, State Key Lab Coal Combust, Wuhan 430074, Peoples R China
Huazhong Univ Sci & Technol, Sch Energy & Power Engn, Wuhan 430074, Peoples R ChinaHuazhong Univ Sci & Technol, State Key Lab Coal Combust, Wuhan 430074, Peoples R China
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Huazhong Univ Sci & Technol, Sch Energy & Power Engn, Wuhan 430074, Peoples R ChinaHuazhong Univ Sci & Technol, Sch Energy & Power Engn, Wuhan 430074, Peoples R China
Zhang, Beidong
Jiang, Yankun
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Huazhong Univ Sci & Technol, Sch Energy & Power Engn, Wuhan 430074, Peoples R ChinaHuazhong Univ Sci & Technol, Sch Energy & Power Engn, Wuhan 430074, Peoples R China
Jiang, Yankun
Chen, Yexin
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Huazhong Univ Sci & Technol, Sch Energy & Power Engn, Wuhan 430074, Peoples R ChinaHuazhong Univ Sci & Technol, Sch Energy & Power Engn, Wuhan 430074, Peoples R China