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Optimal Design and Energy-Saving Investigation of the Triple CO2 Feeds for Methanol Production System by Combining Steam and Dry Methane Reforming
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2020-01-14 , DOI: 10.1021/acs.iecr.9b05296
Hong Wang 1 , Yang Su 1 , Dan Wang 1 , Saimeng Jin 1 , Shun’an Wei 1 , Weifeng Shen 1
Affiliation  

The process of synthesizing syngas with the triple CO2 feeds is proposed to achieve an efficient use of CO2 that mitigates climate warming. Also, the amount of CO2 added in three locations as the variables of the process is optimized based on the CO2 conversion rate and the energy consumption per unit product (ECP) output flow rate by the genetic algorithm. The performances of the triple CO2 feeds in the methanol synthesis process had been evaluated by comparing with the traditional methanol production processes. To further reduce energy consumption, the irreversibility of each component and the locations of the inefficiency in the overall selected production process are studied on the basis of the exergy analysis. Pinch analysis is further used to find the optimal matching scheme. Compared with those of the proposed process, the energy consumption and the total exergy loss of the heat-integrated process are significantly reduced by 33.1 and 6.65%, respectively. Besides, the overall total annual cost is reduced by 10.1% and the cost of utilities is saved by 36.4%, which results in energy-saving.

中文翻译:

蒸汽与干气重整相结合的甲醇生产系统三重CO 2进料的优化设计和节能研究

提出了用三重CO 2进料合成合成气的方法,以实现减轻气候变暖的CO 2的有效利用。此外,CO的量2在三个位置作为该过程的变量添加被优化基于所述CO 2转化率和通过遗传算法的每单位产品(ECP)输出流量的能量消耗。三重CO 2的性能通过与传统甲醇生产工艺进行比较,对甲醇合成工艺中的进料进行了评估。为了进一步降低能耗,在能值分析的基础上研究了每个组件的不可逆性和整个选定生产过程中效率低下的位置。捏分析进一步用于找到最佳匹配方案。与拟议的工艺相比,热集成工艺的能耗和总火用损失分别降低了33.1%和6.65%。此外,整体年度总成本降低了10.1%,公用事业成本节省了36.4%,从而实现了节能。
更新日期:2020-01-15
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