共查询到18条相似文献,搜索用时 62 毫秒
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氢能是公认的清洁能源,它具有储运方便、利用途径多样、高利用率及来源广泛等特点,可为解决能源危机、全球变暖和环境污染提供帮助。当前,一些发达国家已将氢能列为国家能源体系中的重要组成部分,我国在氢能的研究及产业化方面也投入巨大。本文综合考虑氢能在能源和化工领域的应用,较为全面地总结了氢能作为清洁能源在燃料电池汽车、分布式发电、燃料电池叉车和应急电源,作为能源载体在可再生能源消纳以及作为重要化工原料在油品质量升级和煤制清洁能源各方面的国内外利用现状,分析明确了氢清洁能源的利用是目前推动氢能发展的主要动力,氢能源载体的利用有助于可再生能源和氢能的协同发展,而氢化工原料的利用则是目前最有希望实现氢能规模化利用的有效途径,同时指出氢的制取、储运和燃料电池技术依然是制约氢能发展的关键因素。 相似文献
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对近年来CO2用于甲烷重整,甲烷氧化偶联,低碳烷烃脱氢制烯烃,脱氢芳构化等方面的工作进行了评述.指出开发高活性催化剂,有效活化碳氢键与碳氧键,增加催化剂的稳定性是未来工业应用中的核心问题. 相似文献
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通过对国内外能源消费及未来发展趋势的分析,进一步阐明了甲醇燃料在我国今后能源结构调整中的重大意义、发展优势及潜在市场前景,并提出了在国内发展甲醇燃料的初步建议。 相似文献
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煤是自然界中分布最广、储量最丰富的含碳资源,其分子结构与纳米碳材料具有天然的相似性,是优质的纳米碳材料前体。多年来,以煤为前体制备的各种纳米碳材料已被广泛应用于能源、信息、环境和生物医学等领域。其中,煤基零维纳米碳材料如纳米金刚石、富勒烯、碳纳米洋葱、碳点等,因其具有小的纳米尺寸、大的比表面积、独特的球形结构等,表现出优异的荧光特性、电化学性能以及催化性能等,在能源转化和存储等领域展现出极大的应用潜力。本文综述了基于煤炭及其衍生物为前驱体的各类零维纳米碳材料的制备方法和性能,并对其在照明显示、电化学储能、光/电催化等方面的应用进展进行总结,指出目前存在的问题与挑战及其解决策略,最后对其未来发展进行了展望。这为促进煤炭的高附加值转化和利用以及大规模制备煤基零维纳米碳材料提供理论和实践支持。 相似文献
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The conversion of palm oil to hydrocarbons using a shape selective zeolite catalyst is reported in this work. Palm oil was passed over HZSM-5 catalyst in a fixed bed micro-reactor and the reactor was operated at atmospheric pressure, a temperature range of 360 to 420°C and weight hourly space velocity (WHSV) of 2 to 4 h?1. The main objective was to study the effect of reaction temperature and oil space velocity on the conversion and selectivity of gasoline range hydrocarbons. The results show that 40 to 70wt% of the palm oil can be converted to aromatics and hydrocarbons in the gasoline, diesel and kerosene range, light gases, coke and water. The maximum gasoline range hydrocarbons yield of 40wt% of total product formed was obtained at 400°C and 2 h?1 space velocity. 相似文献
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Polymer-derived ceramics (PDCs) are being actively explored in various fields today because of their unique physiochemical properties. Very recent advances in the use of PDCs in energy storage technologies (e.g., batteries, supercapacitors) have motivated researchers to explore the possibilities of PDCs as electrocatalysts for use in energy conversion reactions. Impressively, the tunable functional properties, especially the electrical properties, of PDCs have helped to break through this “bottleneck” and enabled them to become promising materials for use in electrocatalytic conversion. This review presents an in-time summary of the progress in the development of PDCs for electrochemical energy conversion. First, a general introduction to the preparation of PDCs is provided. Later, the factors (e.g., chemical stability, electron conductivity) most closely related to electrocatalytic performance are discussed. Specifically, the parameters that affect the electron conductivity of PDCs are enumerated to delve into advanced strategies for achieving effective electrocatalysts. The relevant electrocatalytic conversion reactions (e.g., hydrogen evolution reaction, oxygen evolution reaction, and oxygen reduction reaction) and utilization of PDCs in these reactions are also comprehensively introduced. Finally, the current challenges and future opportunities for PDC materials in the field of electrochemical energy conversion are summarized. 相似文献