A review of low-rank coals liquefaction processes containing water and syngas (or CO)
A review of low-rank coals liquefaction processes containing water and syngas (or CO)
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DOI：
10.1016/j.fuel.2022.126260
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发表时间：
2023-01
期刊：
影响因子：
7.4
通讯作者：
Huangwei Li;Wencai Peng;Di Zhu;Jiale Gu;Youqing Wu;Sheng Huang;Jinsheng Gao;Baofeng Zhao;Haibin Guan;Chao Li;Jing Xu;Jinfeng Bai;Yanli Lv;Jinhui Yang;Dabo Chen;Shi-fa Wu
中科院分区：
文献类型：
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作者：
Huangwei Li;Wencai Peng;Di Zhu;Jiale Gu;Youqing Wu;Sheng Huang;Jinsheng Gao;Baofeng Zhao;Haibin Guan;Chao Li;Jing Xu;Jinfeng Bai;Yanli Lv;Jinhui Yang;Dabo Chen;Shi-fa Wu
随着对能源和原材料需求的不断增加，有效利用低阶煤的重要性日益突出。由于脱氧和干燥分别需要大量的氢和能量，低变质煤在直接液化中的利用受到其高氧和高水分含量的限制。在含水、合成气或CO(DCLS)的系统中进行煤炭直接液化是一种经济有效的方法，可以在无纯氢(或贫氢气体)和干燥的条件下，将低阶煤转化为燃料和附加值化学品，从而降低DCLS的整体利用成本。本文介绍了DCLS的最新进展，重点介绍了临界液化行为(主要是煤、催化剂、溶剂等各种参数以及适宜的反应温度和压力对液化行为的影响)、公认的催化液化机理(特别是水-气变换反应)和液化工艺过程。在上述归纳、分析和讨论的基础上，强调了DCLS发展和应用的潜在机遇和挑战。这篇综述旨在讨论有价值的技术，为低阶煤的高效利用提供更多的解决方案。
With the increasing demand for energy and raw materials, the importance of effective utilization of low-rank coals has been emphasized. The utilization of low-rank coals in direct liquefaction is limited by their high oxygen and moisture contents because large amounts of hydrogen and energy are required for oxygen removal and drying, respectively. Direct coal liquefaction in the system containing water and syngas or CO (DCLS) is an economical and effective method that can convert low-rank coals into fuels and value-added chemicals in the conditions of no pure hydrogen (or hydrogen-poor gas) and drying, thus resulting in the whole cost reduction for the utilization of DCLS. This review presents the latest development of DCLS, focusing on critical liquefaction behaviors (mainly the effects of various parameters such as coals, catalysts, solvents, as well as appropriate reaction temperatures and pressures on the liquefaction behaviors), widely recognized catalytic liquefaction mechanisms (especially water–gas shift reaction), and liquefaction technological processes. On the basis of the above inductions, analyses and discussions, the potential opportunities and challenges for the development and application of DCLS are emphasized. This review aims at discussing valuable technologies to provide more solutions for the efficient utilization of low-rank coals.