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首页> 外文期刊>International journal of hydrogen energy >Technical and economic feasibility of adapting an industrial steam reforming unit for production of hydrogen from renewable ethanol
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Technical and economic feasibility of adapting an industrial steam reforming unit for production of hydrogen from renewable ethanol

机译：改造工业蒸汽重整装置以从可再生乙醇生产氢的技术和经济可行性

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摘要

The steam reforming of ethanol could be a solution to reduce CO_2 emissions in industrial hydrogen plants, given its renewable character. To adapt this process into the Repsol refineries, a scheme with pre-reforming section has been considered. Ethanol steam reforming has been tested using a commercial nickel catalyst at industrial pre-reforming conditions, particularly at high pressure (25 bar). In addition, a new "Ethanol-to-shift" process using a commercial water gas shift (WGS) catalyst to convert ethanol is proposed. The pilot plant tests show that complete ethanol conversion is reached at low space velocity (WHSV ＜ 1 h~(-1)) or at high temperature (400 ℃), with predominance of methane formation. The commercial nickel catalyst is stable for at least 530 h due to the use of high hydrogen partial pressure to inhibit coke deposition. Then, it has been proven that it is a technically feasible process for industrial scale. The WGS catalyst (Fe-Cr), however, does not achieve full conversion even at very high temperature. An economic analysis indicates that the steam reforming process would only be viable with a low price of ethanol (around 350 €/t), which is far from the current market price.
机译：鉴于乙醇的蒸汽可重整性，具有可再生性，因此可以作为减少工业制氢厂中CO_2排放的解决方案。为了使该过程适应Repsol炼油厂，已经考虑了一种带有预改革部分的方案。乙醇蒸汽重整已经在工业预重整条件下，尤其是在高压（25 bar）下，使用商用镍催化剂进行了测试。另外，提出了使用商业水煤气变换（WGS）催化剂来转化乙醇的新的“乙醇转化”方法。中试工厂的测试表明，在低空速（WHSV ＜1 h〜（-1））或高温（400℃）下，可以完全转化乙醇，且甲烷的形成主要是甲烷。由于使用高的氢气分压来抑制焦炭沉积，因此商用镍催化剂在至少530小时内稳定。然后，已经证明这是工业规模的技术上可行的方法。然而，WGS催化剂（Fe-Cr）即使在非常高的温度下也无法实现完全转化。一项经济分析表明，只有在乙醇价格低（约350欧元/吨）的情况下，蒸汽重整工艺才可行。

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