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首页> 外文期刊>International journal of hydrogen energy >Renewable energy storage system via coal hydrogasification with co-production of electricity and synthetic natural gas
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Renewable energy storage system via coal hydrogasification with co-production of electricity and synthetic natural gas

机译：煤炭加氢气化与电力和合成天然气联合生产的可再生能源存储系统

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In this paper a novel integrated plant, designed for the co-production of electricity and synthetic natural gas (SNG), has been proposed as suitable strategy for renewable energy storage and CO_2 emission control. The hydrogen generation by electrolysis and its use for SNG production is the approach chosen for the energy storage (chemical storage), while the CO_2 control is performed by using (or recycling) the CO_2, concentrated in the anode exhausts of a molten carbonate fuel cell, in the chemical processes of the plant (coal hydrogasification and SNG production processes). The proposed HyCRESt plant, acronym of Hydrogasification of Coal for Renewable Energy Storage, consists of three main sections: ⅰ) the hydrogasification island, in which the coal is gasified in hydrogen environment to a methane rich fuel gas stream (syngas); ⅱ) the power island, in which the syngas is used as fuel for the electric power generation by using a molten carbonate fuel cell (MCFC) power unit; ⅲ) the SNG island, in which the syngas is converted into a synthetic natural gas stream. The plant performance, in terms of co-production efficiency, CO_2 avoided and fuel saving, has been evaluated by means of thermochemical and electrochemical models able to predict energy and mass balances. Results have pointed out that the co-production of electric and chemical powers allows to achieve system efficiencies greater than 55% with fuel saving values higher than 6% and CO_2 avoided ranging from 20% (only electric power generation) to 120% (only SNG generation).
机译：在本文中，已经提出了一种设计用于电力和合成天然气（SNG）联合生产的新型综合工厂，作为可再生能源存储和CO_2排放控制的合适策略。电解制氢及其在SNG生产中的应用是能量存储（化学存储）所选择的方法，而CO_2的控制是通过使用（或循环利用）浓缩在熔融碳酸盐燃料电池阳极废气中的CO_2进行的。 ，在工厂的化学过程中（煤的气化和SNG生产过程）。拟议中的HyCRESt工厂（可再生能源的煤炭氢气化的首字母缩写）由三个主要部分组成：ⅰ）气化岛，其中的煤在氢气环境中被气化成富含甲烷的燃气流（合成气）； ⅱ）动力岛，其中合成气被用作通过使用熔融碳酸盐燃料电池（MCFC）动力装置发电的燃料； ⅲ）SNG岛，其中合成气转化为合成天然气流。已通过能够预测能量和质量平衡的热化学和电化学模型评估了工厂的性能，包括联产效率，避免的CO_2和节省的燃料。结果指出，电力和化学能的联合生产可实现大于55％的系统效率，而燃油节省值则大于6％，避免的CO_2范围从20％（仅发电）到120％（仅SNG）代）。

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