The methanol (MeOH) steam reforming (MSR) process plays an important role in the MeOH-based international renewable energy supply chain. To address the challenges related to the high cost and substantial CO emissions linked to the state-of-the-art integrated MSR process, this study aims to propose and enhance an intensified MSR process focusing on energy utilization, economic viability and environmental impact. Aside from the MSR process, the overall scenario also includes the water–gas-shift reaction (WGS) process, CO capture using amine-based methods, liquefaction, and hydrogen purification through pressure-swing adsorption. Based on this study, apparent enhancements of the state-of-the-art MSR process can be achieved by adjusting key process variables, especially those related to the CO capture process, and by incorporating various intensification strategies, including heat integration (with feed-effluent heat exchangers) between the MSR and the WGS processes, implementing a side-draw intercooling structure of the CO absorber, splitting the rich solvent flow to the CO stripper, and employing a multi-stage CO stripper with vapor recompression. Compared to the state-of-the-art MSR process in the literature, the intensified MSR process produces ultra-pure hydrogen (99.99 mol%) as a main product while reduces 6.2 % of the shared cost (from 191.0 USD/t-MeOH to 179.1 USD/t-MeOH), increases the overall carbon capture rate by 3 % (from 86.73 % to 89.99 %), and reduces the direct CO emission by approximately 25 % (from 1.41 t-CO/ t-MeOH to 1.06 t-CO/ t-MeOH). Within a MeOH-based international renewable energy supply chain, these enhancements can also significantly lower the imported cost of electricity from 105.9 USD/MWh to 95.5 USD/MWh.

中文翻译：

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强化二氧化碳捕集甲醇蒸汽重整工艺：能源、经济和环境影响的综合分析


甲醇（MeOH）蒸汽重整（MSR）工艺在以MeOH为基础的国际可再生​​能源供应链中发挥着重要作用。为了解决与最先进的综合 MSR 工艺相关的高成本和大量二氧化碳排放的挑战，本研究旨在提出和加强强化 MSR 工艺，重点关注能源利用、经济可行性和环境影响。除了MSR工艺外，总体方案还包括水煤气变换反应（WGS）工艺、使用胺基方法捕获CO、液化以及通过变压吸附纯化氢气。基于这项研究，通过调整关键工艺变量，特别是与 CO 捕获过程相关的变量，并结合各种强化策略，包括热集成（与进料- MSR 和 WGS 工艺之间采用侧出式中间冷却结构，将富溶剂流分流至 CO 汽提塔，并采用带有蒸汽再压缩的多级 CO 汽提塔。与文献中最先进的 MSR 工艺相比，强化 MSR 工艺生产超纯氢气 (99.99 mol%) 作为主要产品，同时降低了 6.2% 的共享成本（从 191.0 美元/t-MeOH至 179.1 美元/t-MeOH），总体碳捕获率提高 3%（从 86.73% 至 89.99%），二氧化碳直接排放量减少约 25%（从 1.41 t-CO/t-MeOH 至 1.06 t） -CO/t-MeOH)。在基于甲醇的国际可再生​​能源供应链中，这些增强功能还可以将进口电力成本从 105.9 美元/兆瓦时显着降低至 95.5 美元/兆瓦时。