Comparison of the effect of biodiesel-diesel and ethanol-diesel on the gaseous emission of a direct-injection diesel engine |
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| Authors: | Yage Di CS Cheung Zuohua Huang |
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| Institution: | 1. State Key Laboratory of Multiphase Flow in Power Engineering, Xi''an Jiaotong University, Xi''an 710049, PR China;2. Department of Mechanical Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, PR China;1. College of Mechanical and Vehicle Engineering, Hunan University, Changsha, 410082, China;2. Institute of New Energy and Energy-saving & Emission-reduction Technology, Hunan University, Changsha 410082, China;3. Department of Mechanical and Energy Engineering, Shaoyang University, Shaoyang, Hunan 422004, China;1. Tarbiat Modares University, Tehran, Iran;2. Faculty of Mechanical Engineering, Universiti Malaysia Pahang, 26600 Pekan, Pahang, Malaysia;3. Faculty of Mechanical Engineering, Universiti Teknologi Malaysia, 81310 Skudai , Johor, Malaysia;1. Department of Mechanical Engineering, S. A. Engineering College, Chennai, Tamil Nadu, India;2. Department of Mechanical Engineering, Jyothi Engineering College, Cheruthuruthy, Thrissur, Kerala, India;3. Department of Mechanical Engineering, Regional Campus of Anna University, Tirunelveli, Tamil Nadu, India;4. Department of Chemical Engineering, National Institute of Technology Calicut, Kozhikode, Kerala, India |
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| Abstract: | Experiments were conducted on a 4-cylinder direct-injection diesel engine using ultralow sulfur diesel blended with biodiesel and ethanol to investigate the gaseous emissions of the engine under five engine loads at the maximum torque engine speed of 1800 rev min?1. Four biodiesel blended fuels and four ethanol blended fuels with oxygen concentrations of 2%, 4%, 6% and 8% were used. With the increase of oxygen content in the blended fuels, the brake thermal efficiency improves slightly.For the diesel-biodiesel fuels, the brake specific HC and CO emissions decrease while the brake specific NOx and NO2 emissions increase. The emissions of formaldehyde, 1,3-butadiene, toluene, xylene and overall BTX (benzene, toluene, xylene) in general decrease, however, acetaldehyde and benzene emissions increase. For the diesel-ethanol fuels, the brake specific HC and CO emissions increase significantly at low engine load, NOx emission decreases at low engine load but increases at high engine load. The emissions of benzene and BTX vary with engine load and ethanol content. Similar to the biodiesel-diesel fuels, the formaldehyde, 1,3-butadiene, toluene and xylene emissions decrease while the acetaldehyde and NO2 emissions increase. Despite having the same oxygen contents in the blended fuels, there are significant differences in the gaseous emissions between the biodiesel-diesel blends and the ethanol-diesel blends. |
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