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对高温氦气加热的甲烷蒸汽重整制氢过程进行了热力学分析。结果表明,在较高温度条件下压力对系统重整性能的影响很小。在重整压力大于1 MPa,水碳比大于2时,随着温度的升高,热效率先增加到最大值然后又缓慢下降;在温度800~1000℃范围内,随着水碳比的增加热效率先升高后下降。分析表明,利用高温气冷堆氮气供热的甲烷蒸汽重整制氢系统,选择较高的水碳比和重整温度有利于提高系统热效率和制氢性能。得到了匹配高温气冷堆供热系统且能使氢气产量和热效率的接近最大值的甲烷蒸汽重整反应优化操作参数范围.
The thermodynamic analysis of methane steam reforming with high temperature helium heating was carried out. The results show that the pressure has little effect on the reforming performance of the system at higher temperature. When the reforming pressure is greater than 1 MPa and the water-carbon ratio is greater than 2, the thermal efficiency first increases to the maximum with the increase of temperature and then decreases slowly. With the increase of water-carbon ratio at 800 ~ 1000 ℃, the thermal efficiency First increase and then decrease. The analysis shows that the methane steam reforming hydrogen production system using nitrogen gas supplied by high temperature gas cooled reactor can improve the system thermal efficiency and hydrogen production performance by choosing higher water / carbon ratio and reforming temperature. The optimal operating parameters of methane steam reforming are obtained, which match the HTGR heating system and make the hydrogen production and thermal efficiency close to the maximum value.