Khan T M Yunus
Department of Mechanical Engineering, College of Engineering, King Khalid University, Abha 61421, Asir, Saudi Arabia.
Nanomaterials (Basel). 2021 Feb 6;11(2):417. doi: 10.3390/nano11020417.
In the current research, the biodiesel was prepared from feedstocks of Neem oil and Karanja oil employing a single step direct transesterification method using acid-base catalysts simultaneously. The fuel properties of both Neem and Karanja biodiesel along with different biodiesel-diesel blends were studied and compared. Biodiesel produced from Neem oil was found better in terms of kinematic viscosity, calorific value and cloud point for all its blends with diesel compared to Karanja biodiesel-diesel blends. Experiments were conducted to study the effects of addition of graphene nano particles on fuel properties of biodiesel-diesel blends. The B20 biodiesel-diesel blend was selected, which was blended with graphene nano particles in different proportions (35, 70, 105 ppm) to get different stable and symmetric B20-nano blends. The fuel properties except kinematic viscosity were further improved with higher dosages of nano particles with the biodiesel-diesel blend. The performance and emissions tests were conducted on 4-stroke variable compression ratio diesel engine. Higher concentrated B20-nano blends of Neem (NOME20GO105) and Karanja (KOME20GO105) resulted in 31 and 30.9% of brake thermal efficiency, respectively, compared with diesel of 32.5%. The brake-specific fuel consumption (BSFC) was reduced by 10 and 11% for NOME20GO105 and KOME20GO105, respectively, compared to their respective B20 blends. Similarly, carbon monoxide (CO) was reduced significantly by 27 and 29% for NOME20GO105 and KOME20GO105, respectively.
在当前的研究中，采用一步直接酯交换法，同时使用酸碱催化剂，以印楝油和刺桐油为原料制备生物柴油。研究并比较了印楝生物柴油和刺桐生物柴油以及不同生物柴油 - 柴油混合燃料的性能。结果发现，与刺桐生物柴油 - 柴油混合燃料相比，印楝油生产的生物柴油在与柴油的所有混合燃料的运动粘度、热值和浊点方面表现更好。进行了实验，以研究添加石墨烯纳米颗粒对生物柴油 - 柴油混合燃料性能的影响。选择了B20生物柴油 - 柴油混合燃料，将其与不同比例（35、70、105 ppm）的石墨烯纳米颗粒混合，得到不同的稳定且对称的B20 - 纳米混合燃料。随着纳米颗粒用量增加，生物柴油 - 柴油混合燃料除运动粘度外的其他燃料性能进一步改善。在四冲程可变压缩比柴油发动机上进行了性能和排放测试。与柴油的32.5%相比，印楝（NOME20GO105）和刺桐（KOME20GO105）的高浓度B20 - 纳米混合燃料的制动热效率分别为31%和30.9%。与各自的B20混合燃料相比，NOME20GO105和KOME20GO105的制动比油耗（BSFC）分别降低了10%和11%。同样，NOME20GO105和KOME20GO105的一氧化碳（CO）排放量分别显著降低了27%和29%。
