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Establishment of sustainable electric power supplement system by system design tool using EUD

利用EUD系统设计工具建立可持续电力补充系统

基本信息

批准号：
17310021
负责人：
TAKESHITA Kenji
金额：
$ 5.25万
依托单位：
Tokyo Institute of Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2005
资助国家：
日本
起止时间：
2005 至 2006
项目状态：
已结题

项目摘要

In this study, we proposed the PEACE (Peaceful East-Asia Centered Electricity) Network to supply the electricity stably in the East Asia region. Hydroelectric power and low quality natural gas was used as primary energy source. Hydrogen gas was produced by the electrolysis of water and DME (dimethylester) was produced by the catalytic reaction process with low quality natural gas and hydrogen gas. DME was used as an energy-transfer material, which is suitable for the long-distance transfer of energy. For the establishment of PEACE network, the development of reasonable DME synthesis process is required. The conventional DME synthesis systems (direct synthesis and methanol dehydration) were analyzed by EUD (Energy Utilization Diagram) method and the improvement of these systems was discussed. From these results, a new DME synthesis system using hydrogen and oxygen generated by the electrolysis of water was proposed.The methanol dehydration system was complicated, but both energy and exe … More rgy efficiencies were larger than those of direct synthesis system. This is because the carbon conversion yield is higher than that of direct method. The methanol dehydration system is more excellent than the direct synthesis system. From these results, we proposed a new DME synthesis system with high reaction conversion, in which the methanol synthesis column was divided to 5 columns and the pressure and temperature of these columns were optimized. As a result, the carbon conversion yield was increased to 99.5% and the exergy loss per 1mol DME production was reduced up to 60% of that for the direct synthesis and 40% of that for the methanol dehydration system.A chemical-looping combustor was developed and operated by a pilot-scale reactor. The chemical-looping combustion system can separate CO_2 from the outlet gas without any additional energy. In this system, two reactors are used to perform the combustion. In the reduction reactor, the reduction of metal by the fuel gas is performed, and the oxidation of the reduced metal by the air is performed in the oxidation reactor. A Fe_2O_3-AI_2O_3 composite powder is used as oxygen-transfer material between the reduction column and oxidation column. By the improvement of the separation of composite powder and gas in the reduction column, high CO_2 recovery more than 90% was attained successfully. Less

在这项研究中，我们提出了和平(和平东亚中心电力)网络，以稳定地供应东亚地区的电力。以水电和劣质天然气为一次能源。以劣质天然气和氢气为原料，电解水制取氢气，催化反应生成二甲酯。采用二甲醚作为能量传递材料，适用于能量的远距离传递。为了建立和平网络，需要开发合理的二甲醚合成工艺。采用能量利用图(EUD)法对传统的二甲醚合成系统(直接合成法和甲醇脱水法)进行了分析，并对这些系统的改进进行了探讨。在此基础上，提出了一种新的利用水电解产生的氢气和氧气合成二甲醚的系统。甲醇脱水系统复杂，但能量和EXE…更多的RGY效率高于直接合成系统。这是因为碳转化率比直接法高。甲醇脱水系统优于直接合成系统。根据这些结果，我们提出了一种新的高反应转化率的二甲醚合成系统，将甲醇合成塔划分为5个塔，并对这些塔的压力和温度进行了优化。结果表明，碳转化率提高到99.5%，单位1molDME生产的(火用)损失降低到直接合成法的60%和甲醇脱水系统的40%。化学链燃烧系统可以在不增加任何额外能量的情况下将二氧化碳从出口气体中分离出来。在该系统中，使用两个反应器来执行燃烧。在还原反应器中，通过燃气进行金属的还原，并且在氧化反应器中进行空气对还原金属的氧化。采用Fe_2O_3-Al_2O_3复合粉末作为还原塔和氧化塔之间的传氧材料。通过对还原塔内复合粉气分离的改进，成功地获得了高达90%以上的CO2回收率。较少