Article
Engineering, Chemical
Minyong Lee, Heecheon Lee, Chaeyeong Seo, Jeongwoo Lee, Jae W. Lee
Summary: This study proposes energy-efficient design alternatives for dimethyl carbonate production by combining various heat integration routes. The hybrid heat integrated sequences, based on internal and external heat integration and a vapor recompression heat pump, resulted in cost reduction, energy savings, and reduced CO2 emissions, by eliminating certain heat duties.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Thermodynamics
Ying Wu, Ying Dai, Weiyi Xie, Haijun Chen, Yuezhao Zhu
Summary: This study conducts a performance analysis on the integration of post-combustion CO2 capture and solar energy in a coal-fired power plant. The results show that the integration of solar energy can significantly improve the electric efficiency and reduce costs. The use of absorption heat pump and absorption heat exchanger enables heat integration among the steam cycle, the CO2 capture process, and the solar energy system.
Article
Thermodynamics
Liheng Guo, Yudong Ding, Qiang Liao, Xun Zhu, Hong Wang
Summary: A new heat supply strategy for the CO2 capture process was proposed and evaluated, showing the effectiveness of utilizing internal heat exchangers to enhance the performance of a two-stage heat pump. Lowering the CO2 desorption temperature can significantly improve the COP of the heat pump system and overall thermodynamic performance.
Article
Thermodynamics
Zhaoyang Cui, Qian Du, Jianmin Gao, Rushan Bie
Summary: In this paper, a waste heat recovery route of CO2 chemical absorption systems is proposed to achieve waste heat recovery and cascade utilization in heating season. Simulation and experimental methods were used to study carbon capture systems and absorption heat pump. The system can achieve energy conservation and CO2 emission reduction effect, with over 80% of the solution waste heat recovered and the two-stage gas waste heat recovery process improving boiler efficiency by over 19%.
APPLIED THERMAL ENGINEERING
(2023)
Article
Engineering, Chemical
Yinggui Xu, Jinlong Li, Qing Ye, Yudong Li
Summary: This study focuses on the separation of a ternary mixture using extractive distillation, with dimethyl sulfoxide as the optimal solvent. By introducing vapor recompressed heat pump technology and heat integration, significant energy savings were achieved. Direct extractive distillation was found to be better than indirect extractive distillation, with double-heat pump assisted direct extractive distillation showing the best performance in energy conservation and cost reduction.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Green & Sustainable Science & Technology
Wei Wu, Rasa Supankanok, Walairat Chandra-Ambhorn, Muhammad Ikhsan Taipabu
Summary: A palm oil-based polygeneration system (POPS) combines a fixed bed hydrotreating reactor (FBHTR), a three-phase separator, and cryogenic separators to produce green diesel and liquefied petroleum gas (LPG). The FBHTR model is validated and optimized using the response surface methodology. Designs 2 and 3 of the POPS are CO2-negative and utilize evacuated tube solar collectors, amine-based CO2 capture processes, and heat integration designs to reduce emissions and improve efficiency. Design 2 achieves the maximum negative net CO2 emissions, while Design 3 produces high-purity products simultaneously.
Article
Thermodynamics
Jielin Luo, Zhiming Ye, Zhen Zhao, Kaiyin Yang, Shaozhi Zhang, Qin Wang
Summary: In this study, the vapor-liquid equilibrium properties of two eco-friendly CO2/HFO blends were measured and the Peng-Robinson and Soave-Redlich-Kwong models were found to accurately describe the VLE with deviations less than 4.5%. A heat pump water heater was also modeled to demonstrate the thermodynamic and safety advantages of CO2/HFO, showing higher volumetric heating capacity and comparable efficiency compared to R134a.
APPLIED THERMAL ENGINEERING
(2023)
Article
Thermodynamics
Nahyan Arshad, Ahmed Alhajaj
Summary: The study evaluates the technoeconomic aspects of different configurations of advanced MEA-based Post-Combustion CO2 Capture (PCCC) processes applied to a 750 MW Combined Cycle Gas Turbine (CCGT) power plant. Using energy and levelized cost of capture as key performance indicators (KPIs), a rigorous rate-based model of the PCCC process was validated and used to analyze the synergistic effects of combining three process configurations. The results indicate that the combination of Absorber Inter Cooling (AIC) + Rich Solvent Split (RSS) + Lean Vapor Compression (LVC) is the optimal choice, providing significant energy and cost savings.
Article
Energy & Fuels
Julio Bravo, Donata Drapanauskaite, Nenad Sarunac, Carlos Romero, Thomas Jesikiewicz, Jonas Baltrusaitis
Summary: The energy optimization modeling work aims to improve efficiency of existing coal-fired power plants through thermal integration for partial CO2 capture and reduction of energy requirements. The optimization of the post-combustion CO2 capture process helps offset efficiency and capacity losses incurred by retrofit or implementation of post-combustion CO2 capture.
Article
Thermodynamics
Jason Hirschey, Zhenning Li, Kyle R. Gluesenkamp, Tim J. LaClair, Samuel Graham
Summary: A heat pump can transfer heat from a low-temperature source to a high-temperature sink with energy input. Integrating thermal energy storage (TES) into a heat pump system allows advantageous coupling to different temperature bodies. The circumstances for TES integration with heat pumps are not well understood.
INTERNATIONAL JOURNAL OF REFRIGERATION
(2023)
Review
Green & Sustainable Science & Technology
Kelvin O. Yoro, Michael O. Daramola, Patrick T. Sekoai, Edward K. Armah, Uwemedimo N. Wilson
Summary: Absorptive CO2 Capture (ACC) is a mature technology for mitigating CO2 emissions, but implementing it on a commercial scale can be energy-intensive and expensive. Energy recovery during ACC can be achieved by integrating flexible heat exchanger networks. This review summarizes the current state of knowledge creation in process integration and ACC, focusing on the integration of flexible HENs for energy recovery.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2021)
Article
Engineering, Environmental
Mengxiao Yu, Xiaobin Liu, Yanfang Chen, Zhihan Zhang, Yifei Wang, Jinli Zhang, You Han
Summary: A novel process coupling syngas purification and CO2 capture, transcritical CO2 power and absorption refrigeration is proposed to achieve energy conservation and CO2 emission reduction. The study shows that the process meets industrial requirements and can reduce CO2 emissions.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Energy & Fuels
Armin Ebrahimi, Bahram Ghorbani, Masoud Taghavi
Summary: This study proposes a novel integrated structure for capturing and liquefying CO2 from power plant flue gases, in order to reduce carbon emissions. By utilizing various technologies and energy sources, the system is able to generate efficient liquid CO2 products.
ENERGY SCIENCE & ENGINEERING
(2022)
Article
Green & Sustainable Science & Technology
Yawen Zheng, Song He, Lin Gao, Sheng Li
Summary: The study finds that the importance of absorbent innovation and process upgrading varies for emission sources with different CO2 concentrations. Absorbent innovation is more effective for high-concentration sources, while process upgrading is more suitable for low-concentration sources.
INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL
(2021)
Article
Thermodynamics
Wei Wu, Harrison M. Skye, John J. Dyreby
Summary: The study developed a prototype CO2 liquid-to-air GSHP and a detailed model to simulate its performance. Testing and comparison showed that the CO2 GSHP has better cooling performance than the R410A GSHP under low temperature conditions.
ENERGY CONVERSION AND MANAGEMENT
(2021)