Simulation of a sorption-enhanced water gas-shift pilot technology for pure hydrogen production from a waste gasification plant

IF 7.2 2区工程技术 Q1 CHEMISTRY, APPLIED

Fuel Processing Technology Pub Date : 2024-01-11 DOI:10.1016/j.fuproc.2024.108032

Barbara Malsegna , Alex Sebastiani , João Guilherme da Gama Paz-Dias , Francesco Di Luca , Andrea Di Giuliano , Katia Gallucci , Massimiliano Materazzi

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Abstract

This study has analysed and optimised a 5-column sorption enhanced water gas shift (SEWGS) pilot unit, set to operate for the first time in a waste gasification facility for the production of transport-grade hydrogen and CO₂ streams. Full process simulation was undertaken by developing a one-dimensional model of each reactor, with boundary conditions directly informed by real plant operation. From the sensitivity analysis performed, syngas flowrate variations were seen to have a minor but temporary, impact on hydrogen product specifications, while changes to syngas composition were shown to have a longer-lasting effect on system performance. Based on full cycle operation results, the current 5-column SEWGS unit design was concluded to be inadequate for fuel-cell-grade H₂ production, despite obtaining a high H₂ purity of 99.5%, mainly due to its excessive steam consumption. However, the process achieved an exceptionally high CO₂ purity of 99.9%, and 88.6% hydrogen recovery rate, suggesting its potential use in carbon capture and heat-grade hydrogen production applications.

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模拟吸附增强型水气变换中试技术，从废物气化厂生产纯氢

本研究分析并优化了一个 5 柱吸附增强型水煤气变换 (SEWGS) 试验装置，该装置将首次在废物气化设施中运行，用于生产运输级氢气和二氧化碳流。通过建立每个反应器的一维模型，并根据实际工厂的运行情况直接确定边界条件，进行了全流程模拟。从所进行的敏感性分析来看，合成气流速的变化对氢气产品规格的影响较小，但只是暂时的，而合成气成分的变化则会对系统性能产生较持久的影响。根据全循环运行结果，尽管目前的 5 塔 SEWGS 装置可获得 99.5% 的高纯度氢气，但其设计仍不足以生产燃料电池级氢气，主要原因是蒸汽消耗量过大。不过，该工艺的二氧化碳纯度特别高，达到 99.9%，氢气回收率为 88.6%，这表明它有可能用于碳捕获和热量级氢气生产应用。

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来源期刊

Fuel Processing Technology 工程技术-工程：化工

CiteScore

13.20

自引率

9.30%

发文量

398

审稿时长

26 days

期刊介绍： Fuel Processing Technology (FPT) deals with the scientific and technological aspects of converting fossil and renewable resources to clean fuels, value-added chemicals, fuel-related advanced carbon materials and by-products. In addition to the traditional non-nuclear fossil fuels, biomass and wastes, papers on the integration of renewables such as solar and wind energy and energy storage into the fuel processing processes, as well as papers on the production and conversion of non-carbon-containing fuels such as hydrogen and ammonia, are also welcome. While chemical conversion is emphasized, papers on advanced physical conversion processes are also considered for publication in FPT. Papers on the fundamental aspects of fuel structure and properties will also be considered.