Hydrogen, nitrogen and carbon dioxide production through chemical looping using iron-based oxygen carrier – A Green plant for H2 and N2 production
Hydrogen, nitrogen and carbon dioxide production through chemical looping using iron-based oxygen carrier – A Green plant for H2 and N2 production
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DOI：
10.1016/j.ijhydene.2014.03.108
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发表时间：
2014-07
影响因子：
7.2
通讯作者：
A. Edrisi;Z. Mansoori;B. Dabir;A. Shahnazari
中科院分区：
文献类型：
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作者：
A. Edrisi;Z. Mansoori;B. Dabir;A. Shahnazari
为了模拟纯甲烷在铁基载氧体化学链中的性能，研究了同时生产氢气、氮气和二氧化碳三种纯气体的情况。为此目的，讨论了最大产氢量、进气氧气完全消耗和甲烷完全燃烧的适当操作条件。专业软件用于模拟化学循环反应器并优化其输出流。结果表明，在该过程中，每摩尔甲烷燃料可分别产生2.533、2.65和0.99摩尔的纯N2、H2和CO2，对CH4到H2的能量转化贡献率为80.2%。此外，为了消耗全部输入燃料并最大化氢气产量，有必要使用支撑材料来改善氧载体颗粒的机械性能并通过三个反应器的热集成来优化流的温度。此外，由于三个反应器的可控温度，可以使用更多的载氧颗粒流率来代替支撑材料，而空气流率应该是合理的，以产生纯氮气。因此，除了氢气和CO2生产外，三个化学循环反应器可以通过比空气分离单元等传统技术更简单的工艺直接生产氮气。
In order to simulate the performance of pure methane in chemical looping using iron-based oxygen carrier, simultaneously production of three pure streams of hydrogen, nitrogen and carbon dioxide has been investigated. For this purpose, proper operating conditions have been discussed for maximum production of hydrogen, complete consumption of oxygen of inlet air and complete combustion of methane. Professional software is used to simulate the chemical looping reactors and optimize their output streams. Results show that in this process each mole of methane fuel can produce 2.533, 2.65 and 0.99 mol of pure N2, H2and CO2, respectively which contributes 80.2% energy conversion of CH4to H2. Moreover, in order to consume the whole input fuel and maximize hydrogen production, it is necessary to use a supportive material to improve mechanical property of oxygen carrier particles and optimize temperature of streams by thermal integration of three reactors. Also, due to controllable temperature of three reactors, more flow rate of oxygen carrier particles can be used instead of supportive material while the air flow rate should be justified to produce pure nitrogen. Hence, three chemical looping reactors, beside hydrogen and CO2production, can directly produce nitrogen, by means of a process simpler than the conventional technologies like air separation unit.