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Hydrogenation to convert CO2 to C1 chemicals: Technical comparison of different alternatives by process simulation
The Canadian Journal of Chemical Engineering ( IF 1.6 ) Pub Date : 2020-05-05 , DOI: 10.1002/cjce.23755
Elena Barbera 1, 2 , Fabio Mantoan 3 , Alberto Bertucco 1, 2 , Fabrizio Bezzo 3
Affiliation  

Carbon dioxide (CO2) conversion by catalytic reaction with hydrogen to produce different C1 chemicals is a promising strategy in view of the development of a sustainable chemical industry. In this work, two CO2 hydrogenation routes are investigated in detail, respectively syngas and formic acid syntheses. Starting from published experimental reaction data, simulation models based on a kinetic analysis were developed and implemented in Aspen Plus process simulator. The two processes are analyzed according to a number of selected technological indicators, comprising CO2 conversion, specific H2 consumption, product yield, energy duties, and carbon emissions. To extend our study, three additional CO2 conversion pathways are considered, respectively methanol, methane, and urea syntheses, whose technological performances were retrieved from similar studies available in the scientific literature. Under the assumption that H2 is available from renewable sources, our results highlight that CO2 conversion routes towards fuel compounds (ie, syngas and methane) look particularly appealing from the energy balance point of view. If non‐renewable energy is used to produce H2, the actual environmental benefits (in terms of net CO2 emissions) strongly depend on the country‐specific carbon intensity for electricity generation.

中文翻译:

加氢将CO2转化为C1化学品:通过工艺模拟对不同替代品进行技术比较

考虑到可持续化学工业的发展,通过与氢的催化反应转化二氧化碳(CO 2)以产生不同的C1化学品是一种有前途的策略。在这项工作中,详细研究了两种CO 2氢化途径,分别是合成气和甲酸的合成。从已发布的实验反应数据开始,在Aspen Plus过程模拟器中开发并实现了基于动力学分析的模拟模型。根据许多选定的技术指标对这两个过程进行了分析,包括CO 2转化率,H 2比消耗,产品产量,能效和碳排放量。为了扩展我们的研究,另外三个CO 2分别考虑了甲醇,甲烷和尿素合成的转化途径,其技术性能可从科学文献中的类似研究中获得。在H 2可以从可再生资源中获取的假设下,我们的结果突出表明,从能量平衡的角度来看,CO 2转化为燃料化合物(即合成气和甲烷)的途径特别有吸引力。如果使用不可再生能源生产H 2,则实际的环境收益(就净CO 2排放而言)在很大程度上取决于国家特定的发电碳强度。
更新日期:2020-05-05
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