FORMATION AND BEHAVIOR OF COAL FREE-RADICALS IN PYROLYSIS AND LIQUEFACTION CONDITIONS
FORMATION AND BEHAVIOR OF COAL FREE-RADICALS IN PYROLYSIS AND LIQUEFACTION CONDITIONS
复制标题
DOI：
10.1038/289476a0
复制
发表时间：
1981-01-01
期刊：
影响因子：
64.8
通讯作者：
GRANDY, DW
中科院分区：
文献类型：
--
作者：
PETRAKIS, L;GRANDY, DW
在过去的几年里，人们对煤和煤转化的基础研究重新产生了兴趣。这种兴趣是由于期望了解煤的结构和煤转化过程中的基本过程将有助于开发以成本效益高和环境可接受的条件利用煤的技术。在这种情况下，电子自旋共振（ESR）是一种很有前途的技术，因为它可以用来研究煤中的顺磁中心，包括反应性自由基，通常被认为在转化过程中具有关键作用。迄今为止报道的煤的ESR测量都是对预先存在的自由基或经过一些处理后剩余的自由基的测量。本文报道了一种独特设计的高压高温ESR腔的制作和使用，以及煤中自由基的首次原位观测。
In the past several years there has been a renewed interest in fundamental studies of coals and coal conversion. This interest is due to the expectation that an understanding of the structure of coal and of the fundamental processes during coal conversion would aid the development of technology for the utilization of coal on cost-effective and environmentally acceptable terms. In this context, electron spin resonance (ESR) is a promising technique, for it can be used to study paramagnetic centres in coal, including reactive free radicals which are generally assumed to have a key role in conversion processes. The ESR measurements of coals reported to date have all been measurements of pre-existing free radicals or free radicals remaining after some treatment. We report here the fabrication and utilization of a uniquely designed high-pressure–high-temperature ESR cavity and the firstin situobservation of free radicals in coals.