Thermodynamic and techno-economic analysis of coal to ethylene glycol process (CtEG) with different coal gasifiers

Yang, Qingchun; Zhu, Shuangdong; Yu, Peijing; Yang, Qing; Zhang, Dawei

doi:10.1016/j.enconman.2019.04.019

Cited by 42 publications

(12 citation statements)

References 36 publications

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“…To estimate the TCI, we divide it into fixed capital investment (FCI) and working capital (WC). The FCI mainly includes direct costs such as the equipment cost (EC), the cost of installation and maintenance of equipment, and the cost of land building during the construction and indirect costs such as plant construction expenses and engineering and supervision costs . It can be estimated by the cost coefficient method, as shown in eqs and …”

Section: Techno-economic Analysis Methodsmentioning

confidence: 99%

“…The FCI mainly includes direct costs such as the equipment cost (EC), the cost of installation and maintenance of equipment, and the cost of land building during the construction and indirect costs such as plant construction expenses and engineering and supervision costs . It can be estimated by the cost coefficient method, as shown in eqs and where θ is the domestic factor, sf is the production scale factor, Q and I are the production capacity and equipment cost, Q ref and I ref refer to the production capacity and investment of the established project, and F eco, ij is the ratio factor for estimating the fixed capital cost, which is summarized in Table S1 in the Supporting Information.…”

Section: Techno-economic Analysis Methodsmentioning

confidence: 99%

“…The IRR refers to the discount rate that makes the cumulative net present value (NPV) of the investment income stream zero, as shown in eq where NCF i refers to the annual net cash flow of the project in the i th year and n means the plant life, which is set as 20 years, including a construction period of 2 years in this study.…”

Section: Techno-economic Analysis Methodsmentioning

confidence: 99%

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Process Development and Technoeconomic Analysis of Different Integration Methods of Coal-to-Ethylene Glycol Process and Solid Oxide Electrolysis Cells

Yang

Chu

Zhang

et al. 2021

Ind. Eng. Chem. Res.

Self Cite

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The conventional coal-to-ethylene glycol (CtEG) process is criticized for its high CO 2 emissions. Because most CtEG projects are located in areas rich in renewable energy such as wind energy and solar energy, two novel green hydrogen-assisted CtEG processes are proposed and analyzed by the integration of solid oxide electrolysis cell (SOEC) technology: the CtEG process integrated with the SOEC technology of only steam electrolysis (SOEC-CtEG) and that of steam and carbon dioxide electrolysis (CoSOEC-CtEG). The effects of the operating temperature, current density, and inlet gas composition on the electrochemical performance of the solid oxide steam electrolytic and coelectrolytic processes are investigated and compared based on their electrochemical and flowsheet-based models. The thermodynamic and technoeconomic advantages of the two proposed processes are manifested by comparison with a conventional process. The results show that the two proposed processes are promising because they increase the carbon utilization efficiency by 26.13 and 22.48%, increase the exergy efficiency by 14.82 and 17.34%, decrease the total capital investment by 23.60 and 19.38%, decrease the levelized production cost by 20.55 and 27.47%, and increase the internal rate of return by 8.85 and 9.18%. In addition, the sensitivity analysis results show that the two proposed processes have stronger antirisk ability than the conventional process.

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Section: Techno-economic Analysis Methodsmentioning

confidence: 99%

Section: Techno-economic Analysis Methodsmentioning

confidence: 99%

Section: Techno-economic Analysis Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Process Development and Technoeconomic Analysis of Different Integration Methods of Coal-to-Ethylene Glycol Process and Solid Oxide Electrolysis Cells

Yang

Chu

Zhang

et al. 2021

Ind. Eng. Chem. Res.

Self Cite

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“…There are about 20 CtEG plants have successfully operated, and the total capacity of CtEG plants is more than 5.1 megatons per year in China. [6,7,[39][40][41] In the current synthesis process, the syngas is first separated into H 2 and CO, pressure swing adsorption (PSA) technology is an effective method to separate H 2 and CO from syngas, but it needs a lot of energy. [42] Then, methyl nitrite (MN) is used as the reaction intermediate, and after the reaction, it is reduced through the by-product methanol and NO.…”

Section: Introductionmentioning

confidence: 99%

Direct Synthesis of Ethylene Glycol from Syngas

Sun

Chai

2022

ChemistrySelect

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After decades of development, the reaction conditions for direct synthesis of ethylene glycol (EG) from syngas are still very harsh. The reason for the severe conditions of direct synthesis of EG is revealed by thermodynamic analysis. This review analyzed the reason why all the current studies on direct synthesis of EG from syngas are homogeneous synthesis. Through the evidence of other related studies and the exploration of reaction mechanism, some suggestions for the further investigation of direct synthesis of EG are also put forward. We also summarizes the progress of direct synthesis of EG from syngas in the past decades, and details the current development status. The catalysts, promoters and reaction conditions used for direct synthesis of EG are sorted out.

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“…For example, Pettinau et al [16] conducted a techno-economic comparison between different technologies for CO 2 -free power generation from coal. In our previous work [17], a thermodynamic and technoeconomic analysis of the CTEG process with different gasifiers was conducted to make the appropriate and reasonable decision and choice of efficient, economical and cleaner coal gasifier technologies. However, not many literature has been reported to the optimal selection of CO 2 capture technology for the CTEG process through technical and economic analysis.…”

Section: Introductionmentioning

confidence: 99%

Comparative Investigation of Different CO2 Capture Technologies for Coal to Ethylene Glycol Process

Liao

et al. 2021

Processes

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The coal to ethylene glycol (CTEG) process has drawn much attention due to the serious conflict between supply and demand of ethylene glycol in China. However, it is inevitably accompanied by the problem of high CO2 emissions. Carbon capture is one of the most promising potential effective ways to address this issue. However, the CTEG process, integrated with carbon capture technology, will lead to energy and economic penalties. Thus, a comprehensive evaluation of CTEG process with different CO2 capture technologies is urgently needed. This study analyzed the technoeconomic performance of four CO2 capture alternatives for the CTEG process: Rectisol, mono-ethanol amine (MEA), chilled ammonia process (CAP) and dimethyl carbonate (DMC) technologies. Results show the energy consumption of CO2 capture of the Rectisol process is the lowest, 1.88 GJ/tCO2, followed by the DMC process, 2.10 GJ/tCO2, the CAP process, 3.64 GJ/tCO2, and the MEA process, 5.20 GJ/tCO2. The CO2 capture cost of the Rectisol process is lowest, CNY 169.5/tCO2, followed by the DMC process, CNY 193.2/tCO2, the CAP process CNY 232.6/tCO2, and the MEA process CNY 250.5/tCO2. As the Rectisol technology has the best comprehensive performance, it is the best option for CTEG industry in comparison with the MEA, CAP, and DMC technologies.

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Thermodynamic and techno-economic analysis of coal to ethylene glycol process (CtEG) with different coal gasifiers

Cited by 42 publications

References 36 publications

Process Development and Technoeconomic Analysis of Different Integration Methods of Coal-to-Ethylene Glycol Process and Solid Oxide Electrolysis Cells

Process Development and Technoeconomic Analysis of Different Integration Methods of Coal-to-Ethylene Glycol Process and Solid Oxide Electrolysis Cells

Direct Synthesis of Ethylene Glycol from Syngas

Comparative Investigation of Different CO2 Capture Technologies for Coal to Ethylene Glycol Process

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