Process Simulation for Converting CO2 Emissions from the Cement Industry to Dimethyl Ether

IF 2.9 4区 综合性期刊 Q1 Multidisciplinary
Mohamed Essam, Fatma Gad, Nour Abouseada, Moustafa Aly Soliman, Dina Aboelela
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Abstract

Climate change is the leading severe problem in the twenty-first century, which is associated with greenhouse gas emissions, carbon dioxide that is the foremost cause of global warming and super greenhouse effect. In this concern, to avoid hazardous problems, the steady stream of CO2 effluents existing in the atmosphere must be transformed to beneficial products for being used as an abundant chemical feedstock. Implementing a new green strategy, which is known for the catalytic hydrogenation of CO2 into alternative fuels and valuable chemicals, will be a long-lasting solution to alleviate CO2 emissions. In this paper, a process simulation showing the synthesis of dimethyl ether (DME) from CO2 hydrogenation (CO2 produced from EL-Sewedy cement industry) is performed using Aspen HYSYS V10 to attain a complete distinctive design for all equipment for producing a capacity of 475,000 tons per year, while energy integration is performed using Energy Analyzer Simulation software. In the main model, catalytic dehydration is done in a single-pass reactor, and then separation in multi-column product separations. Other configurations were tested by developing three simulation models with different reactors, a double pipe reactor and membrane reactor were with the aim of modification for higher energy efficiency and lower operating and capital costs. Moreover, an economic and environmental study was obtained for the basic & the integrated case, which showed that the total annual/capital costs based on the “base case” are estimated to be 90 million USD without heat integration while the optimum and integrated costs are found to be 100 Million USD. Finally, process optimization and integration were obtained to reduce the utilized energy of the hot & cold utilities by 90% and 60%, respectively.

Abstract Image

将水泥工业排放的二氧化碳转化为二甲醚的工艺模拟
气候变化是二十一世纪的主要严重问题,它与温室气体排放有关,二氧化碳是全球变暖和超级温室效应的主要原因。因此,为了避免出现危险问题,必须将大气中源源不断的二氧化碳废气转化为有益产品,用作丰富的化学原料。实施新的绿色战略,将二氧化碳催化加氢转化为替代燃料和有价值的化学品,将是缓解二氧化碳排放的长久之计。本文使用 Aspen HYSYS V10 对二氧化碳加氢(EL-Sewedy 水泥工业产生的二氧化碳)合成二甲醚(DME)的过程进行了模拟,以获得年产量为 475,000 吨的所有设备的完整独特设计,同时使用 Energy Analyzer Simulation 软件进行了能源整合。在主要模型中,催化脱水在单程反应器中进行,然后在多柱产品分离器中进行分离。为了提高能效、降低运行成本和资本成本,还开发了三个不同反应器、双管反应器和膜反应器的模拟模型,对其他配置进行了测试。此外,还对基本 &amp 和综合案例进行了经济和环境研究,结果表明,基于 "基本案例 "的年总成本/资本成本在没有热集成的情况下估计为 9000 万美元,而最佳和综合成本为 1 亿美元。最后,工艺优化和整合可使热& 冷公用设施的能耗分别降低 90% 和 60%。
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来源期刊
Arabian Journal for Science and Engineering
Arabian Journal for Science and Engineering 综合性期刊-综合性期刊
CiteScore
5.20
自引率
3.40%
发文量
0
审稿时长
4.3 months
期刊介绍: King Fahd University of Petroleum & Minerals (KFUPM) partnered with Springer to publish the Arabian Journal for Science and Engineering (AJSE). AJSE, which has been published by KFUPM since 1975, is a recognized national, regional and international journal that provides a great opportunity for the dissemination of research advances from the Kingdom of Saudi Arabia, MENA and the world.
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