Recovery of diesel-like fuel from waste palm oil by pyrolysis using a microwave heated bed of activated carbon
Recovery of diesel-like fuel from waste palm oil by pyrolysis using a microwave heated bed of activated carbon
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DOI：
10.1016/j.energy.2016.09.076
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发表时间：
2016-11-15
期刊：
影响因子：
9
通讯作者：
Chase, Howard A.
中科院分区：
文献类型：
--
作者：
Lam, Su Shiung;Wan Mahari, Wan Adibah;Chase, Howard A.
研究了使用活性炭的良好混合床作为微波吸收器和反应床的微波热解，以从废弃棕榈食用油（一种在亚洲广泛使用的食用油）中回收有用产品的潜力。碳床提供快速加热（-18 ℃/min）和局部反应热区，其在450 ℃下热促进废油的广泛热解裂解，从而在不到25分钟的过程中增加生物燃料产品的产量。它还创造了还原反应环境，防止生物燃料中形成不期望的氧化化合物。热解产生的生物燃料产品是低氧的，不含硫、羧酸和甘油三酯，并且还含有轻质C-10-C-15烃和几乎与柴油燃料相当的高热值，因此显示出用作燃料的巨大潜力。这种热解方法为酯交换提供了一种有吸引力的替代方案，避免了使用溶剂和催化剂，以及从烃产物中除去游离脂肪酸和甘油的需要。以1.12kW的电功率输入操作的热解装置能够产生能量含量相当于约3 kW的生物燃料，显示出2.7的正能量比和输入到系统的能量的>= 73%回收。结果表明，热解方法作为从废油中回收生物燃料的技术和能量上可行的手段具有巨大的潜力。(C)2016爱思唯尔有限公司版权所有
Microwave pyrolysis using a well-mixed bed of activated carbon as both the microwave absorber and reaction bed was investigated for its potential to recover useful products from waste palm cooking oil - a cooking oil widely used in Asia. The carbon bed provided rapid heating (-18 degrees C/min) and a localized reaction hot zone that thermally promoted extensive pyrolysis cracking of the waste oil at 450 degrees C, leading to increased production of a biofuel product in a process taking less than 25 min. It also created a reducing reaction environment that prevented the formation of undesirable oxidized compounds in the biofuel. The pyrolysis produced a biofuel product that is low in oxygen, free of sulphur, carboxylic acid and triglycerides, and which also contains light C-10-C-15 hydrocarbons and a high calorific value nearly comparable to diesel fuel, thus showing great potential to be used as fuel. This pyrolysis approach offers an attractive alternative to transesterification that avoids the use of solvents and catalysts, and the need to remove free fatty acids and glycerol from the hydrocarbon product. The pyrolysis apparatus operated with an electrical power input of 1.12 kW was capable of producing a biofuel with an energy content equivalent to about 3 kW, showing a positive energy ratio of 2.7 and >= 73% recovery of the energy input to the system. The results show that the pyrolysis approach has huge potential as a technically and energetically viable means for the recovery of biofuels from the waste oil. (C) 2016 Elsevier Ltd. All rights reserved.