Article
Chemistry, Physical
Narmin Noorani, Behrad Barzegar, Abbas Mehrdad, Hassan Aghdasinia, Seyed Jamaleddin Peighambardoust, Hossein Kazemian
Summary: This study focuses on enhancing the CO2 adsorption capacity of activated carbon composites by incorporating metal oxides. AC/MgO and AC/Fe3O4 composites showed adsorption capacities of 38.567 mmol g(-1) and 71.963 mmol g(-1), respectively, at 298.15 K and 5 bar. The adsorbents maintained adsorption capacities of 94.1%, 97.9%, and 96.5%, respectively, after six consecutive cycles. These findings highlight the promising potential of AC/MgO composites as effective adsorbents for CO2 capture applications.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Engineering, Chemical
Yan Xu, Youlin Chen, Cheng Ma, Wenming Qiao, Jitong Wang, Licheng Ling
Summary: Simultaneous removal of NH3 and H2S at room temperature is important for industrial production safety and environmental protection. In this study, adsorbents with metal chlorides and metal oxides loaded in activated carbon fiber mat were prepared and shown to efficiently remove NH3 and H2S. The adsorbents have a large surface area and hierarchical porous structure, allowing for effective adsorption of NH3 and H2S.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Biochemistry & Molecular Biology
Szu-Han Wang, Feng-Cheng Chang
Summary: This study aimed to develop lignosulfonate activated carbon fibers (LACFs) and investigate the metal recovery mechanisms. The LACFs were prepared through electrospinning and CO2-based physical activation. The activated LACF exhibited a larger specific surface area, total pore volume, and micropore ratio, as well as more acidic and sulfur functional groups. The adsorption behaviors of Cu(II) and Au(III) on LACF could be described using the Freundlich and Langmuir model, respectively. Both systems involved physisorption and chemisorption, with mechanisms including electrostatic forces, Van der Walls forces, cation exchange, and surface complexation. Overall, this study provides a foundation for developing physically activated lignosulfonate carbon for metal ion recovery.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2022)
Article
Chemistry, Physical
Drew M. Glenna, Asmita Jana, Qiang Xu, Yixiao Wang, Yuqing Meng, Yingchao Yang, Manish Neupane, Lucun Wang, Haiyan Zhao, Jin Qian, Seth W. Snyder
Summary: This article introduces an AC-based material and proposes a hierarchical guideline for evaluating the feasibility of such materials in carbon capture. The most critical performance indicator is the CO2 adsorption energy, with considerations for thermal stability and defect sensitivity, as well as selectivity and capacity.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Engineering, Chemical
Nor Khonisah Daud, Darshini Muthiyah
Summary: Activated carbon, Fe-MOF, ZnO, and CaO were prepared and used as adsorbents in the CO2 adsorption process. Fe-MOF showed better performance in CO2 adsorption due to its higher surface area compared to the other adsorbents. The optimal parameters for CO2 adsorption were determined for all adsorbents.
CHEMICAL ENGINEERING & TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Faten Ermala Che Othman, Norhaniza Yusof, Sadaki Samitsu, Norfadhilatuladha Abdullah, Muhammad Faris Hamid, Kazukiyo Nagai, Muhammad Nizam Zainal Abidin, Mohd Ariff Azali, Ahmad Fauzi Ismail, Juhana Jaafar, Farhana Aziz, Wan Norharyati Wan Salleh
Summary: In this study, activated carbon nanofibers (ACNFs) incorporated with different metal oxides were successfully prepared using a simple electrospinning and pyrolysis process. Among the four types of metal oxides investigated, magnesium oxide (MgO) incorporated ACNF2 showed the highest CO2 adsorption capacity, indicating great potential for enhanced adsorption performance.
JOURNAL OF CO2 UTILIZATION
(2021)
Article
Environmental Sciences
Shuangjun Li, Moon-Kyung Cho, Ki Bong Lee, Shuai Deng, Li Zhao, Xiangzhou Yuan, Junyao Wang
Summary: The scientific community has long believed in the potential of waste PET plastics as an effective carbon precursor. Developing PET-derived activated carbons (PETACs) for specific applications remains a challenge. This study successfully designed a high-value PETAC, P600K600-1.5, with the highest gas selectivity and decent CO2 adsorption uptake through a comprehensive process of development method screening, experiments design, and sample optimization. Utilizing PETACs as CO2 adsorbents not only addresses plastic pollution but also helps combat the greenhouse effect.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Thermodynamics
Gautam, Satyabrata Sahoo
Summary: The current research focuses on characterizing and comparing the physiochemical properties of seven commercially available activated carbons (ACs) as adsorbents for CO2 capture. The study found that the selected ACs have high micro and ultra-micro porosity, making them suitable for post-combustion CO2 capture. The study also estimated important thermodynamic properties of adsorption and confirmed that the selected ACs are suitable for various gas sorption applications.
THERMAL SCIENCE AND ENGINEERING PROGRESS
(2022)
Article
Multidisciplinary Sciences
Zhao Li, Chengliang Mao, Qijun Pei, Paul N. Duchesne, Teng He, Meikun Xia, Jintao Wang, Lu Wang, Rui Song, Abdinoor A. Jelle, Debora Motta Meira, Qingjie Ge, Kulbir Kaur Ghuman, Le He, Xiaohong Zhang, Geoffrey A. Ozin
Summary: This study demonstrates that disorder engineering can boost light absorption, charge carrier separation, and surface reactions in photocatalysts, leading to enhanced CO2 reduction. The crystalline-amorphous heterostructure with surface frustrated Lewis pairs shows increased reactivity and provides a new approach for catalytically generating sustainable chemicals and fuels.
NATURE COMMUNICATIONS
(2022)
Article
Thermodynamics
Gautam, Satyabrata Sahoo
Summary: The research focuses on characterizing and comparing seven commercially available activated carbons as adsorbents for CO2 capture, revealing their suitability for various gas sorption applications and providing valuable properties for actual system design.
THERMAL SCIENCE AND ENGINEERING PROGRESS
(2022)
Article
Engineering, Chemical
Chaiyot Tangsathitkulchai, Suravit Naksusuk, Atichat Wongkoblap, Poomiwat Phadungbut, Prapassorn Borisut
Summary: The study investigated the equilibrium and kinetics of CO2 adsorption by coconut-shell activated carbon impregnated with sodium hydroxide at 273 K. The CO2 adsorption increased with NaOH loading and exhibited three distinctive regions. The results showed an empirical correlation between effective pore diffusivity, CO2 adsorption, and NaOH loading.
Review
Green & Sustainable Science & Technology
He Li
Summary: CO2 capture, utilization, and storage (CCUS) is recognized as the most effective strategy for removing CO2 emissions. However, the application of nanomaterials for CO2 capture in real environmental remediation faces challenges such as limited adsorption capacity and poor regeneration. This review examines the recent advances in CO2 capture on various nanoadsorbents and proposes the challenges and prospects for CO2 capture.
JOURNAL OF CLEANER PRODUCTION
(2023)
Review
Environmental Studies
R. Maniarasu, Sushil Kumar Rathore, S. Murugan
Summary: This review article provides a comprehensive review of the utilization, production, and characterization of biomass-based activated carbon for CO2 adsorption, including utilization research, characterization research, and research on enhancing adsorption performance.
ENERGY & ENVIRONMENT
(2023)
Article
Environmental Sciences
Sergio Acevedo, Liliana Giraldo, Juan C. Moreno-Pirajan
Summary: This study examines the adsorption kinetics of activated carbon (AC) adsorbent materials produced from a by-product of African palm processing. The textural characteristics of the adsorbent solids were determined through N-2 physisorption, revealing BET areas between 721 and 1334 m(2)g(-1) and micropore volumes between 0.33 and 0.55 cm(3)g(-1). FTIR was used for chemical characterization, and CO2 adsorption was measured, showing values between 175 and 274 mg·g(-1). The kinetic study suggests that the intraparticle diffusion model best describes the physisorption process.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Agricultural Engineering
Duy Anh Khuong, Hong Nam Nguyen, Toshiki Tsubota
Summary: Bamboo and its solid residue were successfully converted into porous carbon through physical activation with CO2 agent, with the solid residue showing a higher potential due to its very low ash content. The activated carbon materials exhibited dominant microporous structures, with the highest BET surface area observed in the solid residue-derived carbon. The microporosity structure and CO2 adsorption capacity of the activated carbon could be enhanced under optimal CO2 activation conditions.
BIOMASS & BIOENERGY
(2021)
Article
Chemistry, Analytical
Mojtaba Khajeh, Ahad Ghaemi
Summary: This study investigates the effects of surface activation and modification of nanoclay adsorbent on CO2 adsorption capacity. SEM analysis shows that the layer structure and crystallinity of nanoclay are retained after activation. FTIR analysis reveals structural changes during surface treatment with HCl. BET analysis demonstrates that surface activation increases specific surface area and pore volume. Optimization experiments using response surface methodology suggest that the optimal adsorption capacity is achieved at specific operating conditions. Adsorption isotherm models and the Elovich model provide insights into the CO2 adsorption process. Thermodynamic parameters indicate that the adsorption process is spontaneous and exothermic.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY
(2023)
Article
Green & Sustainable Science & Technology
Farid Maleki, Ahad Ghaemi, Gity Mir Mohamad Sadeghi
Summary: In this study, a hypercrosslinked polymeric adsorbent was synthesized from waste Styrofoam for CO2 adsorption. The adsorbent exhibited excellent adsorption performance, occurred in multi-layers, and the process was spontaneous and exothermic. Furthermore, the adsorbent showed high regenerability after multiple cycles.
ENVIRONMENTAL PROGRESS & SUSTAINABLE ENERGY
(2023)
Article
Environmental Sciences
Hossein Mashhadimoslem, Ahad Ghaemi
Summary: This research focuses on predicting the adsorbed amount of N-2, O-2, and N2O on carbon molecular sieve and activated carbon using the artificial neural network (ANN) approach. Experimental isotherm data and different models were used to establish the neural network, achieving high prediction accuracy.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Green & Sustainable Science & Technology
Mohadeseh Noroozian, Shahrokh Shahhosseini, Ahad Ghaemi
Summary: In this study, piperazine-modified activated alumina was used for CO2 capture process. Artificial neural networks (ANNs) and response surface methodology (RSM) were employed to identify the behavior and performance of the CO2 capture process. The results showed that ANNs produced more accurate predictions than RSM.
ENVIRONMENTAL PROGRESS & SUSTAINABLE ENERGY
(2023)
Article
Energy & Fuels
Maryam Helmi, Farzad Moazami, Ahad Ghaemi, Alireza Hemmati
Summary: In this study, CO2 adsorption experiments were conducted using NaOH@Chitosan-Fe3O4 as a magnetic biodegradable adsorbent. Chitosan was magnetized with Fe3O4 nanoparticles and NaOH solution was immobilized on it to enhance its alkali nature. The results showed that the adsorption capacity increased with increasing pressure and decreasing temperature. The highest adsorption capacity was achieved at 25 degrees C and 9 bar. The isotherm study revealed that the Langmuir, Freundlich, and Sips models provided the best fit to the experimental data. The Elovich kinetic model was the most suitable for describing the adsorption process. The thermodynamic analysis indicated that the adsorption process was exothermic and spontaneous. The diffusion coefficient, mass flux, and mass transfer coefficient for CO2 molecules were calculated to be 2.850 m2/s, 0.0042 mol/m2.s, and 10.324 m/s, respectively.
Article
Nuclear Science & Technology
Fatemeh Ardestani, Ahad Ghaemi, Alireza Hemmati, Jaber Safdari, Vahid Rafiei
Summary: The behavior of dispersed phase holdup (DPH) and slip velocity (SV) was studied in a new type of pulsed extraction columns. The impact of pulsation intensity, interfacial tension, and flow rate of dispersed and continuous phases on DPH and SV was investigated. New semi-experimental correlations were proposed to predict DPH and SV, which showed good agreement with the experimental data.
PROGRESS IN NUCLEAR ENERGY
(2023)
Article
Engineering, Chemical
Hossein Mashhadimoslem, Vahid Kermani, Kourosh Zanganeh, Ahmed Shafeen, Ali Elkamel
Summary: This study proposes a new optimizer linked to the machine learning (ML) model to predict the adsorption performance in different adsorbents. It aims to provide a unified framework for predicting adsorption phenomena under different process conditions. The ML approach linked to the grey wolf optimizer algorithm (GWO) is used to predict the adsorbed amount of O-2 and N-2 on carbon-based adsorbents.
CANADIAN JOURNAL OF CHEMICAL ENGINEERING
(2023)
Article
Energy & Fuels
Kamyar Naderi, Amirsoheil Foroughi, Ahad Ghaemi
Summary: This study investigated the hydraulic characteristics of a structured packing column for an air/water system using artificial neural network and response surface methodology. It identified that the gas factor and liquid load had the greatest effect on pressure drop and liquid hold-up.
CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION
(2023)
Article
Engineering, Multidisciplinary
Pedram Zafari, Ahad Ghaemi
Summary: This article investigates the modeling and optimization of CO2 mass transfer flux through chemical absorption. A combination of Piperazine (PZ) and Monoethanolamine (MEA) amines was used for CO2 absorption. Artificial neural networks (ANN) and Response Surface Methodology (RSM) were employed to achieve the objectives. The resulting models showed acceptable predictions of the experimental data, with ANN being recommended for the development of absorption simulation models due to its lower mean squared error.
RESULTS IN ENGINEERING
(2023)
Article
Engineering, Environmental
Zohreh Khoshraftar, Fatemeh S. Taheri, Shanli Nezami, Ahad Ghaemi
Summary: In this research, halloysite nanotube was studied as a natural adsorbent for CO2 capture. The effects of parameters on carbon dioxide adsorption were determined through the use of artificial neural network modeling and response surface methodology. The optimal operating conditions were determined and the adsorption capacity was measured at different temperatures and pressures, with the results agreeing competently with experimental and simulation results.
CHEMICAL ENGINEERING JOURNAL ADVANCES
(2023)
Article
Engineering, Environmental
Shaparak Mirzaei, Fatemeh Ardestani, Ahad Ghaemi, Alireza Hemmati, Mansour Shirvani
Summary: This study investigates the behavior of hydrodynamic parameters in agitated columns, including ARDC, PRDC, ORC, and Kuhni. The effects of different parameters on dispersed phase holdup and Sauter mean drop diameter were studied. Results show that increasing rotor speed and dispersed and continuous phase velocities enhance dispersed phase holdup. The decline in Sauter mean droplet diameter with increasing rotor speed is more pronounced in ORC and Kuhni columns. The droplet size in the ORC column is larger than in the other columns with the increase in dispersed phase velocity, while subtle changes in droplet size are observed with increasing continuous phase velocity.
CHEMICAL ENGINEERING JOURNAL ADVANCES
(2023)
Article
Engineering, Environmental
Hossein Mashhadimoslem, Ahad Ghaemi, Ali Maleki, Ali Elkamel
Summary: Investigation on the development of oxidized porous carbon adsorbent using walnut-shell precursors-based biomass and the Hummer synthesis method. Characterization techniques including adsorption-desorption of N-2, HRTEM, FESEM, FTIR spectra, and X-ray powder diffraction analyses were employed. The oxidized porous carbon adsorbent exhibited specific surface area (217.34 m(2)/g) and pore volume (0.1524 cm(3)/g). The oxidization process led to a reduction in mesopore and micropore volume, while enhancing oxygen adsorption capacity by over 1.4 times. The improved adsorbent demonstrated remarkable oxygen adsorption selectivity.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Multidisciplinary Sciences
Amir Kazemi, Fatemeh Moghadaskhou, Mahyar Ashourzadeh Pordsari, Faranak Manteghi, Azadeh Tadjarodi, Ahad Ghaemi
Summary: The excessive release of greenhouse gases, especially carbon dioxide (CO2) pollution, has resulted in significant environmental problems all over the world. CO2 capture technologies offer a very effective means of combating global warming, climate change, and promoting sustainable economic growth. UiO-66-NH2 synthesized by the novel sonochemical method has shown high CO2 adsorption capacity and durability.
SCIENTIFIC REPORTS
(2023)
