共查询到19条相似文献,搜索用时 74 毫秒
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等离子体在化学化工中的应用 总被引:1,自引:0,他引:1
本文评述了等离子体化学的发展概况,从无机化学合成、有机化学合成、等离子聚合等六个方面阐述了近年来等离子体在化学和化学工业中的应用状况。 相似文献
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低温等离子体处理是实现工业和获得更好的等离子体表面改性的新方法。介绍了低温等离子体的产生,作用机理,及低温等离子体技术在化工中的应用及发展前景。 相似文献
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Nature gas is not only an increasing important role in energy and chemicals supplies in 21st century but also the second most important of the anthropogenic greenhouse gases. This paper reviewed the plasma technology application in natural gas chemical engineering, pointed out the problem at present and forecasted plasma concerted catalysis technology will facilitate the nature gas directly conversion into more valuable chemicals supplies economically in short after time. 相似文献
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随着高技术学科的飞速进步,化工学科在多年来已形成的理论和实验研究之外,又产生了一种完全独立而新颖的研究手段——分子模拟.目前化学工业受关注的新技术涉及聚合物、电解质等复杂物质,临界、超临界等复杂状态,界面、膜、溶液等复杂现象.实现化学工业从产品到过程设计完全自动化,在这些方面除了准确的物性数据外,更要对各种复杂现象的机理有深刻了解.分子模拟被认为是实现这一目标的关键技术之一.本文以分子动力学为主,结合计算量子化学,对分子模拟在化工应用中的若干问题进行讨论. 相似文献
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Yukio Yamauchi Suguru Noda Hiroshi Komiyama 《Chemical Engineering Communications》2013,200(1-2):267-276
Sustainability of human beings in the 21st century requires development of renewable energy systems based on technology innovation. Chemical engineering plays a key role in promoting technology innovation relating to environmental and energy systems. The technological domains to which chemical engineering has contributed have shift from petrochemicals to functional materials and devices. An example of the key devices expected in the future is a combination of solar cells and Li-ion batteries, in which the indispensable materials are silicon and carbon. The shape and nanostructure of materials must be controlled to fabricate highly efficient devices at a low cost. Single-walled carbon nanotubes (SWNT) and spherical silicon solar cells (SSSC) with a semi-concentration reflector system are discussed as examples of future materials and devices. Chemical engineering is responsible for technology innovation through mass production, product quality control, materials recycling, high-quality device fabrication, and structuring knowledge. 相似文献
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等离子体在煤化工中的应用 总被引:4,自引:3,他引:4
本文从煤的冷氧等离子体氧化、煤的等离子体气体、煤在富氢等离子体中热值直接生产乙炔等几个方面阐述了等离子体在煤化工中的应用现状。指出煤在等离子体中热解直接生产乙炔的技术是一种对环境友好,技术经济上可行,具有潜在工业发展前景的工艺路线,值得重视。 相似文献
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袁晴棠 《化学反应工程与工艺》1993,9(4):341-344
本文通过若干实例,阐明了化学反应工程对我国石化工业发展的作用,并对提高石化工业技术水平的一些技术要点,如提高反应的选择性、节能及新技术路线的开发等问题特别作了强调。 相似文献
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介绍低温等离子体对碳纤维(CF)的表面改性及作用机理,综述低温等离子体处理对CF及其树脂基复合材料的化学和力学性能的影响,探讨了低温等离子体技术在碳纤维复合材料应用中存在的问题和研究方向。 相似文献
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Bruce A. Finlayson 《Catalysis Reviews》1974,10(1):69-138
The orthogonal collocation method is used to obtain approximate solutions to the differential equations modeling chemical reactors. There are two ways to view applications of the orthogonal collocation method. In one view it is a numerical method for which the convergence to the exact answer can be seen as the approximation is refined in successive calculations by using more collocation points, which are similar to grid points in a finite difference method. Another viewpoint considers only the first approximation, which can often be found analytically, and which gives valuable insight to the qualitative behavior of the solution. The answers, however, are of uncertain accuracy, so that the calculation must be refined to obtain useful numbers. However, with experience and appropriate caution, the first approximation is often sufficient and is easy to obtain. Thus it is very often useful in engineering work, where valid approximations are accepted. We present both viewpoints here: we use the first approximation to gain insight into a problem and we refine the calculations to obtain numerical convergence to the exact result. In this later view the method is similar to and in direct competition with finite difference methods, and some of the references listed in the next section discuss the relative advantages of the orthogonal collocation method. 相似文献