On the synthesis of hydrogen producing alternative thermochemical cycles with electrochemical steps
On the synthesis of hydrogen producing alternative thermochemical cycles with electrochemical steps
复制标题
利用电化学步骤合成制氢替代热化学循环
DOI：
10.1016/j.ijhydene.2009.09.105
复制
发表时间：
2010
影响因子：
7.2
通讯作者：
Lealon L. Martin
中科院分区：
文献类型：
--
作者：
R. J. Andress;Lealon L. Martin
在这里，我们扩展了基于工艺系统工程的方法，用于初步评估用于制氢的替代热化学循环。提出了一种新的识别算法，其中包括反应簇搜索空间中的热化学循环和电化学步骤，称为混合循环。得到的公式是一个混合整数非线性程序，我们证明它可以使用分支定界作为一组混合整数线性子问题来解决。目标基准水平或理论最大效率为 35%，为了与基于底部循环的制氢技术竞争，通过基于热夹分析的评估程序筛选已确定的混合循环。通过混合铜-氯系统的案例研究证明了扩展配方的强度。我们的系统评估结果表明，所提出的方法在广泛的温度和候选物种范围内都是稳健的。在本案例研究中，我们确定了几种混合循环，估计基本效率高达 36%，超出了我们的目标效率。
Here we expand on our process systems engineering-based methodology for the initial evaluation of alternative thermochemical cycles for hydrogen production. A new identification algorithm is presented, which includes thermochemical cycles with electrochemical steps, referred to as hybrid cycles, in the reaction cluster search space. The resulting formulation is a mixed integer non-linear program, which we show can be solved as a set of mixed integer linear sub-problems using branch and bound. With a target base level, or theoretical maximum efficiency of 35%, as to be competitive with bottoming cycle based hydrogen production technologies, identified hybrid cycles are screened with an evaluation procedure based on heat pinch analysis. The strength of the expanded formulation is demonstrated with a case study for a hybrid copper–chlorine system. Results from our systematic evaluation suggest the proposed methodology is robust over a wide range of temperatures and candidate species. In this case study, we identify several hybrid cycles with estimated base efficiencies of up to 36%, exceeding our target efficiency.