Technoeconomic analysis and feasibility of co-solvent mixtures in the liquid-liquid extraction of aromatics

Q1 Social Sciences South African Journal of Chemical Engineering Pub Date : 2024-04-01 DOI:10.1016/j.sajce.2024.02.012

Nivaar Brijmohan , Kuveneshan Moodley , Caleb Narasigadu

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Abstract

It is desired to improve the efficiency of liquid-liquid extraction processes in the fuel industry by reducing energy consumption and operational costs as well as reducing risk to health, safety and the environment. Co-solvent mixtures for extraction consisting of butane-1,4-diol, propane-1,2,3-triol (glycerol), and 2-methylpentane-2,4-diol (hexylene glycol) were assessed in terms of capital costs, operating costs and total annual costs relative to a baseline process that is employed for the liquid-liquid extraction of toluene from n-heptane. Commercial solvents such as sulfolane, morpholine-4-carbaldehyde (NFM), and dimethyl sulfoxide (DMSO) were used for the baseline processes that were simulated in ASPEN Plus V10. The capital costs ranged between 5.8–6.2 million US dollars, while the energy intensity ranged between 1000 - 1400 kJ/kg. The total annual costs for all solvents studied varied between 2.4 - 2.6 million dollars. The results highlighted that these co-solvent mixtures may offer some benefits in terms of total annual cost when the impact of solvent choice is holistically considered.

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共溶剂混合物在芳烃液-液萃取中的技术经济分析和可行性研究

人们希望通过降低能耗和运营成本，以及减少对健康、安全和环境的风险，来提高燃料工业中液-液萃取工艺的效率。与从正庚烷中液-液萃取甲苯的基准工艺相比，评估了由丁烷-1,4-二醇、丙烷-1,2,3-三醇（甘油）和 2-甲基戊烷-2,4-二醇（己二醇）组成的萃取共溶剂混合物的资本成本、运营成本和年总成本。在 ASPEN Plus V10 中模拟的基线工艺中使用了商用溶剂，如磺烷、吗啉-4-甲醛（NFM）和二甲亚砜（DMSO）。资本成本在 580-620 万美元之间，能源强度在 1000-1400 kJ/kg 之间。所研究的所有溶剂的年总成本在 240 万至 260 万美元之间。研究结果表明，如果全面考虑溶剂选择的影响，这些共溶剂混合物可能会在年度总成本方面带来一些好处。

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来源期刊

South African Journal of Chemical Engineering Social Sciences-Education

CiteScore

8.40

自引率

0.00%

发文量

100

审稿时长

33 weeks

期刊介绍： The journal has a particular interest in publishing papers on the unique issues facing chemical engineering taking place in countries that are rich in resources but face specific technical and societal challenges, which require detailed knowledge of local conditions to address. Core topic areas are: Environmental process engineering • treatment and handling of waste and pollutants • the abatement of pollution, environmental process control • cleaner technologies • waste minimization • environmental chemical engineering • water treatment Reaction Engineering • modelling and simulation of reactors • transport phenomena within reacting systems • fluidization technology • reactor design Separation technologies • classic separations • novel separations Process and materials synthesis • novel synthesis of materials or processes, including but not limited to nanotechnology, ceramics, etc. Metallurgical process engineering and coal technology • novel developments related to the minerals beneficiation industry • coal technology Chemical engineering education • guides to good practice • novel approaches to learning • education beyond university.