Article
Chemistry, Physical
Zheng Wu, Xing-Hao Du, Qian-Feng Zhang, Maria Stromme, Chao Xu
Summary: This study introduces a new technique called solar thermal swing adsorption (STSA) which utilizes intermittent illumination on porous carbon monolith (PCM) sorbents to selectively adsorb and release CO2 during the CO2 capture process. The PCM sorbents have high CO2 adsorption capacity and selectivity, and when combined with vacuum swing adsorption, can achieve a high CO2 capture rate.
Article
Engineering, Environmental
Conor Cleeton, Amir H. Farmahini, Lev Sarkisov
Summary: This study investigates how the uncertainty in equilibrium adsorption data and other properties of an adsorbent affects its ranking in carbon capture screening studies. By developing a probabilistic isotherm model and utilizing process optimization and surrogate models, the authors show that the performance of zeolite 13X is better represented by a cloud of possible Pareto fronts rather than a single Pareto front. These findings highlight the importance of considering material-level uncertainty when ranking materials for carbon capture.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Engineering, Environmental
Zijun Deng, Arun Gopalan, Lev Sarkisov
Summary: In this article, a multiscale computational framework is used to design zeolites with competitive performance in post-combustion carbon capture. The properties of the LTA zeolite were modified to produce a wide range of isotherms for carbon capture. Molecular simulations showed that the engineered zeolites could meet the standard requirements for CO2 purity and recovery. The performance of these zeolites can be further improved by modifying the cation composition.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Energy & Fuels
Ammar Ali Abd, Mohd Roslee Othman, Zuchra Helwani
Summary: A new model was proposed to predict the mass transfer behavior of CO2 over silica gel, and an overview of mathematical models for CO2 mass transfer was conducted. The model was validated by comparing with experimental data, and the most suitable mass transfer system for predicting CO2 diffusion was identified.
Article
Engineering, Chemical
Stephen J. A. DeWitt, Ryan P. Lively
Summary: This work discusses the development of a novel metal-organic framework (MOF) fiber adsorbent for sub-ambient CO2 capture. Experimental results demonstrate that the fiber adsorbent has good water stability and high adsorption capacity, making it suitable for CO2 capture in practical applications.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2022)
Article
Environmental Sciences
Zunipa Roy, Avinash V. Palodkar, Gopinath Halder
Summary: A novel cooling system based on the PSAD mechanism has been developed using activated carbons derived from wood apple shell, exhibiting high surface area and excellent performance indicators. The system shows high coefficient of performance and cooling effects, with low cost effectiveness, making it an environmentally friendly and efficient cooling solution.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Review
Chemistry, Multidisciplinary
Hongxue Zeng, Xinghong Qu, Dong Xu, Yang Luo
Summary: This article summarizes the application of pressure swing adsorption technology in CO2 enrichment and separation, discusses the optimization methods and internal laws of porous adsorbent materials, and prospects the development needs and research focuses of CO2 adsorbent materials in industrial waste gas treatment.
FRONTIERS IN CHEMISTRY
(2022)
Article
Thermodynamics
W. Liu, Y. C. Lin, L. Jiang, Y. Ji, J. Y. Yong, X. J. Zhang
Summary: This study evaluates and compares the thermodynamic performance of two-stage vacuum-pressure swing adsorption cycles, suggesting that the introduction of a second stage can significantly increase the concentration of product gas and reduce energy input. As the initial concentration of CO2 rises, energy consumption decreases.
Article
Chemistry, Multidisciplinary
Jinyu Wang, Bo Wang, Zulong Wen, Ning Zhao, Tan Li, Wenbo Zhao
Summary: Adsorption separation is a commonly used gas purification method, with pressure swing adsorption (PSA) and temperature swing adsorption (TSA) being the most widely used techniques. Mathematical analysis of the Langmuir isotherm model helps in determining the optimal cyclic adsorption conditions, thermodynamic parameters, and adsorption capacity. This study also develops a predictive isotherm model to calculate the optimal adsorption/desorption temperatures and cyclic adsorption capacity for different adsorbents.
Article
Chemistry, Physical
Hamidreza Mahdavi, Muhammad M. Sadiq, Stefan J. D. Smith, Xavier Mulet, Matthew R. Hill
Summary: Researchers have successfully designed and formed porous liquids (PLs), which have permanent pores instead of transient intermolecular pores found in regular liquids. The combination of porosity and fluidity in PLs has attracted attention due to their unique physicochemical properties. Significant advances have been made in understanding the structure and properties of PLs, with improvements in gas uptake and molecular separation. However, the regeneration and reusability of PLs still need further investigation.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Thermodynamics
Z. X. Zhang, H. J. Xu
Summary: In order to improve the performance and reduce the energy consumption of Direct Air carbon Capture (DAC) technology, a thermodynamic model of 4-step Vacuum-Pressure Swing Adsorption (VPSA) cycle is developed. The total electricity consumption and energy utilization efficiency of VPSA under different operating conditions are analyzed. Results show that capturing CO2 at low concentrations requires significant energy and the introduction of a second stage is necessary. The energy consumed for CO2 separation decreases as the CO2 concentration in the feed gas increases.
Article
Chemistry, Inorganic & Nuclear
Chaohui He, Peng Zhang, Sai Ma, Yujuan Zhang, Tuoping Hu
Summary: Developing ultra-stable adsorbents with high CO2 adsorption performance is an effective solution for the separation of CO2/CH4 and CO2/N-2.
DALTON TRANSACTIONS
(2023)
Article
Engineering, Environmental
Ayse Sever Akdag, Ines Duran, Gulen Gullu, Covadonga Pevida
Summary: The study evaluates the CO2 capture performance of hazelnut shell-based activated carbon adsorbent from dry simulated flue gases using Temperature Swing Adsorption (TSA) and Vacuum Swing Adsorption (VSA) configurations. Results show that the biomass-based adsorbent exhibits high CO2 adsorption performance.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Engineering, Chemical
Cristian Cardenas, David Farrusseng, Ceicile Daniel
Summary: This study presents the development and validation of a dynamic multiscale model for simulating the adsorption and desorption processes in a fixed bed for medical air drying. The model incorporates equations of mass balance, thermodynamics, hydrodynamics, and adsorption/desorption kinetics. The model proves effective in predicting water vapor adsorption and desorption breakthrough curves on adsorbents, considering concentration, flow rate, and temperature, making it a valuable tool for the development and optimization of commercial PSA columns with multiple adsorption layers.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Engineering, Chemical
Soichiro Masuda, Yugo Osaka, Takuya Tsujiguchi, Akio Kodama
Summary: This study combined an adsorbent-packed heat exchanger with a thermal swing adsorption process to capture CO2 effectively. A two-stage system was designed to achieve CO2 purity greater than 90% in the simulated flue gas. The volume of the second-stage adsorption heat exchanger was found to be approximately one-third of the first-stage adsorber due to the increased CO2 concentration. The maximum CO2 purity of 95% was achieved by optimizing the purge air flow rate and regeneration time in the second-stage regeneration process. The overall CO2 recovery ratio was -60%, indicating the need for improvement.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Energy & Fuels
Jungyeon Ji, Kyungmin Im, Heeyeon An, Sung Jong Yoo, Yongjin Chung, Jinsoo Kim, Yongchai Kwon
Summary: Hollow cobalt nitrogen-doped carbon (H-CoNC) is proposed as an anodic catalyst for membraneless hydrogen peroxide fuel cells (HPFC) and enzymatic biofuel cells (EBC), demonstrating superior catalytic activity for hydrogen peroxide oxidation reaction (HPOR) due to its porous and hollow-shell structure, along with a large amount of isolated Co atoms and coordinate bonds with Co and nitrogen (Co-N-4). The improved mass transfer to the active site results in enhanced current density at the bioanode and higher maximum power density (MPD) for both EBC and HPFC when using H-CoNC compared to conventionally synthesized catalysts.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Engineering, Chemical
Ammar Ali Abd, Mohd Roslee Othman, Zuchra Helwani, Hind Jihad Kadhim Shabbani
Summary: The research indicates that in the biomethane upgrading process, using a rigorous heat dissipation system can achieve the highest purity and recovery rate, mainly due to its efficient heat transfer effect.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Bahruddin Ibrahim, Zuchra Helwani, Ivan Fadhillah, Arya Wiranata, Joni Miharyono
Summary: This study investigated the properties of emulsion paint with a binder added from a mixture of modified natural rubber latex (NRL) and polyvinyl acetate (PVAc). The results showed that an NRL concentration of 15% w/w resulted in the best opacity, washability resistance, and drying touch time.
APPLIED SCIENCES-BASEL
(2022)
Article
Nanoscience & Nanotechnology
Edy Saputra, Panca Setia Utama, Yelmida Azis, Zuchra Helwani, Monita Olivia, Wahyu Bambang Widayatno, Oki Muraza
Summary: Chemical Engineering plays a crucial role in the circular economy by utilizing abundant waste materials. In this study, renewable catalysts synthesized from palm oil mill bottom ash were used to produce biodiesel from Calophyllum inophyllum oil. The synthesized catalyst showed high effectiveness in the transesterification process, achieving a fatty acid methyl ester yield of 97%. The produced biodiesel met the specifications of ASTM D6751 and SNI 7182:2015, and the catalyst could be reused up to 5 times.
APPLIED NANOSCIENCE
(2022)
Article
Energy & Fuels
Ammar Ali Abd, Mohd Roslee Othman, Zuchra Helwani
Summary: Biogas upgrading is an important technique for producing renewable biomethane with low carbon footprint. This study models and analyzes the effects of different component species in biogas on the upgrading process. The presence of impurities adversely affects the upgrading performance, but certain impurities can enhance methane recovery.
BIOMASS CONVERSION AND BIOREFINERY
(2022)
Article
Biochemistry & Molecular Biology
Pati Kemala, Rinaldi Idroes, Khairan Khairan, Muliadi Ramli, Zulkarnain Jalil, Ghazi Mauer Idroes, Trina Ekawati Tallei, Zuchra Helwani, Eka Safitri, Muhammad Iqhrammullah, Rosnani Nasution
Summary: Silver nanoparticles were successfully synthesized using aqueous extracts from Calotropis gigantea leaves and flowers, showing broad-spectrum antimicrobial activities.
Article
Chemistry, Physical
Toan Minh Pham, Kyungmin Im, Jinsoo Kim
Summary: This study presented a tungsten-modified titanium dioxide support for platinum catalyst, which showed improved catalytic activity and stability, offering a potential solution to the carbon corrosion issue in proton exchange membrane fuel cells.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Bahruddin Ibrahim, Zuchra Helwani, Arya Wiranata, Ivan Fadhillah, Joni Miharyono, Nasruddin
Summary: Infrastructure developments in recent decades have led to increasing demand for high-performance paints for construction and decorative purposes. Emulsion paint, commonly used for coating buildings' surfaces, relies on its constituent components, such as binders, pigment, solvents, and additives, to achieve its quality and performance. This study explores the potential of bio-based paints with natural rubber latex (NRL) as an emulsion paint binder. The results showed that NRL grafted with styrene monomer or MMA demonstrated improved resistance to wet scrub and abrasion, outperforming PVAc at certain monomer concentrations. Combining NRL grafted with MMA monomer and 30% PVAc showed even better performance and cost-effectiveness compared to NRL grafted MMA alone.
APPLIED SCIENCES-BASEL
(2022)
Article
Chemistry, Physical
Sion Oh, Kyungmin Im, Jinsoo Kim
Summary: Developments in fuel cell technology have led to the design of efficient electrocatalysts for the oxygen reduction reaction (ORR). Metal-nitrogen-carbon (M-N-C) catalysts, particularly carbon nanotube-encapsulated hollow Co-Fe-NC electrocatalysts, show promising catalytic activity and excellent selectivity for ORR. However, the synthesis of carbon-based metal electrocatalysts with evenly distributed active sites and well-controlled structures remains challenging.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Multidisciplinary
Thuan Anh Vo, Yoonmo Koo, Jinsoo Kim, Seung-Soo Kim
Summary: This study characterized non-precious metal catalysts over activated carbon and TiO2-SiO2 supports loaded via incipient wetness impregnation and spray pyrolysis. The research found that activated carbon exhibited better performance in syringol conversion and hydrocarbon selectivity compared to TiO2-SiO2. Additionally, the Ni catalyst showed more effective hydrodeoxygenation performance compared to Fe and NiFe catalysts. The study provides a promising potential for the utilization of non-precious metals and biomass-derived activated carbon in removing oxygen from bio-oil model compounds, contributing to sustainable renewable energy development.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Hind Jihad Kadhim Shabbani, Ammar Ali Abd, Tharveen Raj Rajalingam, Jinsoo Kim, Mohd Roslee Othman, Zuchra Helwani
Summary: This study investigates the use of microporous APKS and ZIF-8 adsorbents for capturing carbon dioxide from flue gas surrogate. The lab simulated and experimented with the purity and recovery of N2 and CO2 in the product and waste stream. The results show that factors like adsorbent type, adsorption times, and CO2 concentration influence the N2 purity in the product stream, while CO2 feed compositions, adsorbent type, and pressure swing operation affect the purity and recovery of CO2 in the waste stream.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Dieu-Phuong Phan, Toan Minh Pham, Hojin Lee, My Ha Tran, Eun Duck Park, Jinsoo Kim, Eun Yeol Lee
Summary: A series of zeolite-porous metal-organic framework composites with different Pt loadings were synthesized via a two-step approach. The Pt-loaded composites showed improved acidity compared to the parent materials and demonstrated high catalytic performance and stability in the selective hydrodeoxygenation process.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2023)
Article
Chemistry, Applied
Van Nhieu Le, Van Cuong Nguyen, Huu Trung Nguyen, Hoai Duc Tran, Thach N. Tu, Woo-Sik Kim, Jinsoo Kim
Summary: Bimetallic metal-organic frameworks with two different metal species demonstrate higher effectiveness in CO2 capture and separation performance than their monometallic counterparts. A series of bimetallic MIL-100(Fe, Al) was synthesized by adding Fe and Al metal precursors with various molar ratios. Among the investigated samples, MIL-100(Fe, Al)#2 showed the highest CO2 adsorption capacity of 3.27 mmol g-1 with an IAST-CO2/N2 selectivity of 76.5 at 25 degrees C and 1 bar. This facile synthetic route has the potential to enhance CO2 adsorption performance.
MICROPOROUS AND MESOPOROUS MATERIALS
(2023)
Article
Energy & Fuels
Hind Jihad Kadhim Shabbani, Ammar Ali Abd, Masad Mezher Hasan, Zuchra Helwani, Jinsoo Kim, Mohd Roslee Othman
Summary: The study investigated hydrogen purification from a surrogate gas using spent coffee grounds as a medium. The process was examined under isothermal, adiabatic, and non-adiabatic conditions using Aspen adsorption software. The results showed that spent coffee grounds can effectively purify hydrogen, and a rectangular non-adiabatic plate column can enhance the purification process by improving purity and recovery responses.
GAS SCIENCE AND ENGINEERING
(2023)
Article
Engineering, Environmental
Ammar Ali Abd, Mohd Roslee Othman, Hind Jihad Kadhim Shabbani, Zuchra Helwani
Summary: This study investigated the biomethane upgrading process using spent coffee as an adsorbent for binary biogas. A model was developed to estimate the temperature profile of the spent coffee's bed, and the results showed that the process performance could be accurately represented by the model. The study also found that adding moisture improved the CO2 removal rate and biomethane purity.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
