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首页> 外文会议>ACS National Meeting Exposition >AGING PROCESS OF BIOMASS PYROLYSIS OIL AND ITS MODEL COMPOUNDS – A MECHANISTIC STUDY
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AGING PROCESS OF BIOMASS PYROLYSIS OIL AND ITS MODEL COMPOUNDS – A MECHANISTIC STUDY

机译：生物质热解油的老化过程及其模型化合物 - 机械研究

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Biofuels are increasingly being viewed as a promising alternative fuel resource due to the growing concerns about increasing global energy consumption and the effects of growing carbon dioxide emissions from fossil fuels. Pyrolysis has been reported as one of the economic ways (i.e., low capital and operating costs) to utilize biomass for bio-fuels and bio-chemicals. However, the produced pyrolysis oils always have higher oxygen content, molecular weight, viscosity and acidity than gasoline and diesel, and consequently they are characterized as having thermal instability, corrosiveness, poor volatility, low heating value, high coking tendency, immiscible with petroleum fuels, and one of the most challenging property -- aging problem. Many researchers have investigated the aging process of pyrolysis oils. Some chemical and physical properties of pyrolysis oils have been examined during the aging process. It is well known that the viscosity of pyrolysis oils increases with storage of time, especially when the oils are stored or handled at high temperature. The average molecular weight of pyrolysis oils also increases during the storage and it has been indicated that the formation of larger molecules is one of the reason for the increasing viscosity of pyrolysis oils during the storage.3 Since the water content of the pyrolysis oils has been found to increase during the aging, it has been considered as one of the byproducts of the aging process. Compared to the well known properties include viscosity, water content and molecular weight of aged pyrolysis oils, only a few of researchers have characterized aged pyrolysis oils primarily by FT-IR and GC/MS to identify changes in chemical structures. Our previous work employed in-situ NMR to monitor the aging process of various pyrolysis oils; however, due to the complexity of pyrolysis oil, the detailed aging mechanisms are still unknown. To explore the mechanisms of aging process is a crucial topic for both development of catalysts and evaluation of upgraded pyrolysis oils. In this study, the fundamental study for the aging process of several pyrolysis oil model compounds has been investigated. The in-situ monitoring of aging process for the cross linking reactions of several model compound have also been examined. The concepts established in this work provide new insights into the aging process of pyrolysis oil.
机译：由于对增加全球能量消耗的令人兴趣和生长二氧化碳排放的影响，生物燃料越来越被视为有希望的替代燃料资源。据报道，热解作为经济方式之一（即低资本和运营成本），以利用生物燃料和生物化学品的生物量。然而，产生的热解油总是具有比汽油和柴油的氧含量，分子量，粘度和酸度更高，因此它们的表征具有热不稳定，腐蚀性，挥发性差，低热值，高焦化倾向，与石油燃料不混溶。 ，以及最具挑战性的财产 - 老化问题之一。许多研究人员研究了热解油的老化过程。在老化过程中已经检查了一些热解油的化学和物理性质。众所周知，热解油的粘度随着时间的增加而增加，特别是当油被储存或在高温下处理时。在储存期间，热解油的平均分子量也增加，并且已经表明较大分子的形成是在储存过程中增加热解油粘度的原因之一。由于热解油的水含量已经存在发现在老化过程中增加，它被认为是老化过程的副产物之一。与众所周知的性质相比包括粘度，水含量和老化热解油的分子量，只有少数研究人员用FT-IR和GC / MS表征着紫外解油，以识别化学结构的变化。我们以前的作品采用原位NMR来监测各种热解油的老化过程;然而，由于热解油的复杂性，详细的老化机制仍然未知。为了探讨衰老过程的机制是催化剂的发展和升级的热解油的评价的关键话题。在这项研究中，研究了几种热解油模型化合物的老化过程的基本研究。还研究了原位监测几种模型化合物的交联反应的老化过程。在这项工作中建立的概念为热解油的老化过程提供了新的见解。

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