Solar hydrogen production by thermal decomposition of natural gas using a vortex-flow reactor
Solar hydrogen production by thermal decomposition of natural gas using a vortex-flow reactor
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DOI：
10.1016/s0360-3199(03)00048-x
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发表时间：
2004
影响因子：
7.2
通讯作者：
D. Hirsch;A. Steinfeld
中科院分区：
文献类型：
--
作者：
D. Hirsch;A. Steinfeld
利用集中太阳辐射作为高温过程热源，对天然气的吸热分解过程进行了实验研究。太阳能化学反应堆的特点是甲烷涡流被限制在腔接收器中，并装载着碳颗粒，这些颗粒同时充当辐射吸收器和非均相分解反应的成核场所。制作了一台5kW的反应堆样机，并在功率通量强度超过3500kW/m2的高通量太阳炉中进行了测试。介绍了化学反应器的工程设计、实验装置和试验结果。在1600K和1bar条件下，甲烷转化为H_2和C(GR)的最大化学转化率为67%。生成的碳是纳米纤维性质的。拟议的太阳能混合化学过程节省了天然气，减少了二氧化碳排放，并提供了一条向太阳能氢气过渡的途径。
The endothermic decomposition of natural gas is experimentally investigated using concentrated solar radiation as the source of high-temperature process heat. The solar chemical reactor features a vortex flow of CH4confined to a cavity-receiver and laden with carbon particles that serve simultaneously as radiant absorbers and nucleation sites for the heterogeneous decomposition reaction. A 5 kW reactor prototype was fabricated and tested in a high-flux solar furnace with power flux intensities exceeding 3500 kW / m2. The chemical reactor engineering, experimental setup, and test results are described. Maximum chemical conversion of CH4to H2and C(gr) was 67% at 1600 K and 1 bar . Carbon formed was of nano-filamentary nature. The proposed solar hybrid chemical process conserves natural gas, reduces CO2emissions, and provides a transition path to solar hydrogen.