Pathways toward carbon-neutral coal to ethylene glycol processes by integrating with different renewable energy-based hydrogen production technologies

Yang, Qingchun; Chu, Genyun; Zhang, Lihao; Zhang, Dawei; Jin, Yu

doi:10.1016/j.enconman.2022.115529

Cited by 37 publications

(12 citation statements)

References 44 publications

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“…The resting oxygen of the air separation unit (ASU) is sent to the dimethyl oxalate synthesis (DMOS) unit. Since the H 2 /CO ratio of the output syngas is lower than that of the methyl glycolate production process, 19 part of the syngas is fed into the WGS unit to boost the H 2 mole fraction of the syngas. The shifted syngas mixed with the unshifted syngas is sent to the gas separation and purification (GSP) unit to remove acidic substances.…”

Section: ■ Process Descriptionmentioning

confidence: 99%

“…Shi et al 11 proposed a novel green hydrogenassisted coal-to-ethylene glycol process and found that the novel process increases the exergy efficiency by 7.6% and reduces CO 2 emission intensity by 63.95%. Zhao et al 12 designed a green hydrogen-assisted coal-to-methanol process, which can improve the carbon, hydrogen, and exergy efficiencies by 28.91, 19.65, and 4.03%, respectively. Wang et al 13,14 also demonstrated that the coal gasification process coupled with green H 2 can significantly improve the overall performance of the traditional process.…”

Section: ■ Introductionmentioning

confidence: 99%

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Conceptual Design and Techno-Economic Analysis of a Novel Coal-to-Polyglycolic Acid Process Considering Wind–Solar Energy Complementary Features for Green H₂ Production and CO₂ Reduction

Chu

Yang

Zhao

et al. 2023

ACS Sustainable Chem. Eng.

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The production of degradable polyglycolic acid from coal is a promising route for converting coal to high-end chemicals and can availably alleviate the problem of excess ethylene glycol. However, the traditional coal-to-polyglycolic acid (CtPGA) process wastes a lot of precious CO gases to adjust the H 2 /CO ratio, simultaneously producing a large amount of CO 2 emissions. To address this issue, this work proposes a novel coal-to-polyglycolic acid process integrated with green hydrogen from complementary wind and solar power (GHCtPGA). The complementary characteristics of solar and wind energy are investigated to generate green hydrogen. It is found that the hybrid power of wind−solar energy for the green hydrogen production process can significantly affect the capacity of the energy and hydrogen storage systems. After the modeling and simulation of the whole flowsheet of the CtPGA and GHCtPGA processes, the techno-economic and environmental performance of these processes is analyzed in detail. Compared with the CtPGA process, the GHCtPGA process reduces CO 2 emissions by 68.85% and improves carbon and exergy efficiencies by 11.57 and 2.72%, respectively. Furthermore, the economic performance of the GHCtPGA process is more satisfactory because its total capital investment is reduced by 11.32%, the total production cost is saved by 3.59%, and the internal rate of return is improved by 2.83%. Finally, a sensitivity analysis is conducted to explore the effect of coal price, electricity price, power consumption, and carbon tax on the economic advantages of the proposed GHCtPGA process. It indicates that the proposed GHCtPGA process has considerably stronger market risk resistance than the CtPGA process. Therefore, the proposed process provides a valuable PGA production route with low carbon, high efficiencies, and optimal economic trade-offs.

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Section: ■ Process Descriptionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

Conceptual Design and Techno-Economic Analysis of a Novel Coal-to-Polyglycolic Acid Process Considering Wind–Solar Energy Complementary Features for Green H₂ Production and CO₂ Reduction

Chu

Yang

Zhao

et al. 2023

ACS Sustainable Chem. Eng.

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“…At present, the main methods to produce hydrogen include thermochemical methods, natural gas reforming methods, coal gasification, steam methane reforming and water electrolysis [26], so there are more and more studies on hydrogen production systems [27][28][29]. In the Wind H2 plan which is proposed by the National Renewable Energy Laboratory (NREL) of the United States, the wind-hydrogen coupled system adopts electrolysis of water to produce hydrogen which is also adopted by other countries in hydrogen storage systems for the wind-solar power generation.…”

Section: Production Storage and Transportation Of Hydrogen Energymentioning

confidence: 99%

Optimization of Operating Hydrogen Storage System for Coal–Wind–Solar Power Generation

2022

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To address the severity of the wind and light abandonment problem and the economics of hydrogen energy production and operation, this paper explores the problem of multi-cycle resource allocation optimization of hydrogen storage systems for coal–wind–solar power generation. In view of the seriousness of the problem of abandoning wind and photovoltaic power and the economy of hydrogen production and operation, the node selection and scale setting issues for hydrogen production and storage, as well as decision-making problems such as the capacity of new transmission lines and new pipelines and route planning, are studied. This research takes the satisfaction of energy supply as the basic constraint and constructs a multi-cycle resource allocation optimization model for an integrated energy system, aiming to achieve the maximum benefit of the whole system. Using data from Inner Mongolia, where wind abandonment and power limitation are severe, and Beijing and Shanxi provinces, where hydrogen demand is high, this paper analyzes the benefits of the hydrogen storage system for coal–wind–solar power generation, and explores the impact of national subsidy policies and technological advances on system economics.

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“…In addition, it produces a large amount of high-price ethylene glycol (EG) as a by-product, which is widely used to produce polyester, synthetic fiber, and cosmetics. 13 It could further greatly improve the economic benefits of the process. Therefore, the indirect hydrogenation of CO 2 to methanol and EG route has a higher techno-economic-environmental performance and promising prospects in industrialization than the direct route.…”

Section: Introductionmentioning

confidence: 99%

Machine learning-aided catalyst screening and multi-objective optimization for the indirect CO₂ hydrogenation to methanol and ethylene glycol process

Yang¹,

Fan²,

Zhou³

et al. 2023

Green Chem.

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Pathways toward carbon-neutral coal to ethylene glycol processes by integrating with different renewable energy-based hydrogen production technologies

Cited by 37 publications

References 44 publications

Conceptual Design and Techno-Economic Analysis of a Novel Coal-to-Polyglycolic Acid Process Considering Wind–Solar Energy Complementary Features for Green H₂ Production and CO₂ Reduction

Conceptual Design and Techno-Economic Analysis of a Novel Coal-to-Polyglycolic Acid Process Considering Wind–Solar Energy Complementary Features for Green H₂ Production and CO₂ Reduction

Optimization of Operating Hydrogen Storage System for Coal–Wind–Solar Power Generation

Machine learning-aided catalyst screening and multi-objective optimization for the indirect CO₂ hydrogenation to methanol and ethylene glycol process

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Pathways toward carbon-neutral coal to ethylene glycol processes by integrating with different renewable energy-based hydrogen production technologies

Cited by 37 publications

References 44 publications

Conceptual Design and Techno-Economic Analysis of a Novel Coal-to-Polyglycolic Acid Process Considering Wind–Solar Energy Complementary Features for Green H2 Production and CO2 Reduction

Conceptual Design and Techno-Economic Analysis of a Novel Coal-to-Polyglycolic Acid Process Considering Wind–Solar Energy Complementary Features for Green H2 Production and CO2 Reduction

Optimization of Operating Hydrogen Storage System for Coal–Wind–Solar Power Generation

Machine learning-aided catalyst screening and multi-objective optimization for the indirect CO2 hydrogenation to methanol and ethylene glycol process

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Conceptual Design and Techno-Economic Analysis of a Novel Coal-to-Polyglycolic Acid Process Considering Wind–Solar Energy Complementary Features for Green H₂ Production and CO₂ Reduction

Conceptual Design and Techno-Economic Analysis of a Novel Coal-to-Polyglycolic Acid Process Considering Wind–Solar Energy Complementary Features for Green H₂ Production and CO₂ Reduction

Machine learning-aided catalyst screening and multi-objective optimization for the indirect CO₂ hydrogenation to methanol and ethylene glycol process