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Integration of Methanol Aromatization with Light Hydrocarbon Aromatization toward Increasing Aromatic Yields: Conceptual Process Designs and Comparative Analysis
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2020-07-09 , DOI: 10.1021/acssuschemeng.0c03705
Dan Zhang 1 , Minbo Yang 1 , Xiao Feng 1 , Yufei Wang 2
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2020-07-09 , DOI: 10.1021/acssuschemeng.0c03705
Dan Zhang 1 , Minbo Yang 1 , Xiao Feng 1 , Yufei Wang 2
Affiliation
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Methanol aromatization occurs with considerable byproducts of light hydrocarbons, resulting in a low yield of benzene, toluene, and xylene (BTX). This work proposes two novel process designs by integrating methanol aromatization with light hydrocarbon aromatization to increase the BTX yield so as to increase profitability and sustainability. For a comprehensive analysis, detailed process simulation models are developed in Aspen HYSYS for the two integrated processes with C3–C5 hydrocarbon single-pass conversions of 35, 55, 75, and 95%. On this basis, technoeconomic analysis and life cycle assessment are conducted for eight cases to systematically compare their profitability and sustainability measured by the net present value and greenhouse gas emissions, respectively. Advantages of the two integrated designs over the nonintegrated methanol to aromatics design are also explored. The results show that integrating light hydrocarbon aromatization with methanol aromatization can significantly increase the BTX yield and net present value by over 49 and 204%, respectively. Besides, producing BTX from the two integrated designs can lower greenhouse gas emissions by 9.87–15.20%. This study also finds that preseparation of the light hydrocarbon aromatization product shows better profitable and sustainable performances than direct coprocessing of the two aromatization products.
中文翻译：
甲醇芳构化与轻烃芳构化的集成以提高芳烃收率：概念性工艺设计和比较分析
甲醇芳构化会与轻烃的大量副产物发生，导致苯，甲苯和二甲苯（BTX）的收率低。这项工作提出了两种新颖的工艺设计，将甲醇芳构化与轻质烃芳构化相结合，以提高BTX收率，从而提高利润率和可持续性。为了进行全面的分析，在Aspen HYSYS中开发了详细的过程仿真模型，用于使用C 3 –C 5的两个集成过程35、55、75和95％的烃单程转化率。在此基础上，对八种情况进行了技术经济分析和生命周期评估，以系统地比较它们的获利能力和可持续性，分别以净现值和温室气体排放量衡量。还探讨了两种集成设计相对于非集成甲醇制芳烃设计的优势。结果表明，将轻烃芳构化与甲醇芳构化相结合可以分别将BTX收率和净现值分别提高49％和204％以上。此外，通过两个集成设计生产BTX可以将温室气体排放降低9.87–15.20％。
更新日期：2020-08-03
中文翻译：
甲醇芳构化与轻烃芳构化的集成以提高芳烃收率：概念性工艺设计和比较分析
甲醇芳构化会与轻烃的大量副产物发生，导致苯，甲苯和二甲苯（BTX）的收率低。这项工作提出了两种新颖的工艺设计，将甲醇芳构化与轻质烃芳构化相结合，以提高BTX收率，从而提高利润率和可持续性。为了进行全面的分析，在Aspen HYSYS中开发了详细的过程仿真模型，用于使用C 3 –C 5的两个集成过程35、55、75和95％的烃单程转化率。在此基础上，对八种情况进行了技术经济分析和生命周期评估，以系统地比较它们的获利能力和可持续性，分别以净现值和温室气体排放量衡量。还探讨了两种集成设计相对于非集成甲醇制芳烃设计的优势。结果表明，将轻烃芳构化与甲醇芳构化相结合可以分别将BTX收率和净现值分别提高49％和204％以上。此外，通过两个集成设计生产BTX可以将温室气体排放降低9.87–15.20％。
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