将二氧化碳转化为合成燃料:利用工业废料生产甲醇的建模、模拟和优化分析

Eng Pub Date : 2024-07-05 DOI:10.3390/eng5030070
V. Kontou, Antonis Peppas, Sotiris Kottaridis, C. Politi, S. Karellas
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引用次数: 0

摘要

近年来,碳捕集与利用(CCU)作为一种有前途的脱碳解决方案在难以消减的行业中崭露头角。与碳捕集与封存(CCS)相比,碳捕集与利用的目的不是封存二氧化碳(CO2),而是将其用于生产合成燃料,如合成甲醇(MeOH)。合成甲醇是利用绿色氢气 (H2) 通过二氧化碳加氢生产的。高效利用二氧化碳和 H2 原料对于最大限度地发挥该工艺的减碳潜力和能源效率至关重要。本研究对一个小型集装箱式便携二氧化碳氢化装置进行了优化分析,该装置的目标是每小时生产 5 千克 MeOH,重点关注碳转化效率 (CCE)、MeOH 产量、H2 消耗量和 MeOH 纯度。分析使用 Aspen Plus V12 进行。首先使用单程模型对初始反应器设计进行评估。然后根据气体小时空间速度 (GHSV) 的结果重新设计反应器。然后对模型进行了扩展,加入了循环回路,并对最终的反应器设计进行了验证,旨在最大限度地提高整体效率。研究了反应器入口温度、反应器压力、导热液体温度和冷凝温度等运行参数的影响。然后进一步扩展了模型,将甲基OH蒸馏过程包括在内,并考察了蒸馏温度的影响。分析的最终结果是一个完全定义和优化的装置,实现了 87.97% 的 CCE 和 84.99% 的 MeOH 产量,消耗 1.11 kg H2/h,生产 5.01 kg MeOH/h,纯度为 99.86 wt%。这项研究为设计小型、集装箱式和便携式二氧化碳加氢装置提供了宝贵的信息和指导,可作为解决与大型装置相关的 H2 生产和运输问题的替代方案。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Transforming CO2 into Synthetic Fuels: Modeling, Simulation, and Optimization Analysis of Methanol Production from Industrial Wastes
Carbon capture and utilization (CCU) has emerged in recent years as a promising decarbonization solution for hard-to-abate industries. Compared to carbon capture and storage (CCS), CCU aims not for the storage of carbon dioxide (CO2) but for its use in the production of synthetic fuels, such as synthetic methanol (MeOH). Synthetic MeOH is produced through CO2 hydrogenation, utilizing green hydrogen (H2). Efficient use of CO2 and H2 feedstocks is essential to maximize the carbon reduction potential and energy efficiency of the process. This study performed an optimization analysis on a small-scale, containerized, and portable CO2 hydrogenation unit with a 5 kg MeOH/h production capacity goal, focusing on carbon conversion efficiency (CCE), MeOH yield, H2 consumption, and MeOH purity. The analysis was conducted using Aspen Plus V12. A single-pass model was used first to evaluate an initial reactor design. The reactor was then re-designed according to the results of the gas hourly space velocity (GHSV). The model was then expanded to include a recycling loop and the final reactor design was validated, aiming to maximize overall efficiency. The effects of the operational parameters including the reactor inlet temperature, reactor pressure, thermal fluid temperature, and condensation temperature were examined. The model was then further expanded to include the MeOH distillation process, and the effect of the distillation temperature was examined. The final product of the analysis was a fully-defined and optimized unit, achieving an 87.97% CCE and an 84.99% MeOH yield, consuming 1.11 kg H2/h for the production of 5.01 kg MeOH/h of 99.86 wt% purity. This study can provide valuable information and guidelines for designing small-scale, containerized, and portable CO2 hydrogenation units, which can serve as alternative solutions to address issues of H2 production and transportation related to large-scale installations.
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Eng
Eng
CiteScore
2.10
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