Review
Environmental Sciences
Xiaohong Wang, Hairong Cheng, Guangzheng Ye, Jie Fan, Fan Yao, Yuqin Wang, Yujun Jiao, Wenfu Zhu, Haomin Huang, Daiqi Ye
Summary: This paper reviews the recent research progress into activated carbon as an adsorbent for carbon-based gases, analyzing key factors affecting the adsorption of carbon-based gases. It also discusses methods to modify activated carbon to improve its adsorption capacity, as well as the targeted applications of such material in the adsorption of different types of carbon-based gases. Finally, future development directions and challenges of activated carbon are discussed, aiming to benefit the development of activated carbon with selective adsorption properties and reduce production costs of adsorbents.
Article
Engineering, Environmental
Mikko Selenius, Joonas Ruokolainen, Joakim Riikonen, Jimi Rantanen, Simo Nakki, Vesa-Pekka Lehto, Marko Hyttinen
Summary: Landfill gas can be used as a renewable fuel, but impurities like hydrogen sulfide and siloxanes can damage gas engines and turbines. This study compared the filtration efficiency of biochar made from birch and willow with activated carbon to remove these impurities from gas streams. The results showed that biochar effectively removed heavier siloxanes, but its efficiency declined for volatile siloxanes and hydrogen sulfide. Further research is needed to improve the performance of biochars.
Article
Engineering, Environmental
Xinyu Ge, Zhilin Wu, Maela Manzoli, Barbara Bonelli, Stefano Mantegna, Werner Kunz, Giancarlo Cravotto
Summary: This study focused on the removal of antibiotics from contaminated water and milk using pristine and modified activated carbons from various biomass sources. Modified activated carbons showed significantly higher adsorption performance for antibiotics than pristine ones, reducing adsorbent consumption and treatment costs.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Engineering, Environmental
Mirtha A. O. Lourenco, Marco Fontana, Pravin Jagdale, Candido Fabrizio Pirri, Sergio Bocchini
Summary: In this study, multi-walled carbon nanotubes with different functionalities were chemically modified with N1-(3-trimethoxysilylpropyl)diethylenetriamine (DETASi) to enhance CO2 adsorption/separation properties. Among the functionalized samples, COOH-modified MWCNT showed the highest CO2 adsorption capacity after DETASi modification. Additionally, the selectivity for CO2/N2 separation was improved after DETASi grafting reaction.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Multidisciplinary
De-Cai Wang, Min-Da Xu, Zhen Jin, Yi-Fan Xiao, Yang Chao, Jie Li, Shao-Hua Chen, Yi Ding
Summary: A porous MgO nanosheet-modified activated carbon fiber felt (MgO@ACFF) was prepared and characterized for fluoride removal. The MgO@ACFF showed fast adsorption rate with more than 90% of fluoride ions being adsorbed within 100 min, and the adsorption kinetics followed a pseudo-second-order model. The Freundlich model fitted well for the adsorption isotherm of MgO@ACFF. The MgO@ACFF exhibited efficient fluoride removal from water in a wide pH range of 2-10 and a fluoride adsorption capacity larger than 212.2 mg/g at neutral. Co-existing anions had an effect on the fluoride removal efficiency of MgO@ACFF. The mechanism of fluoride adsorption by MgO@ACFF was revealed to be a hydroxyl and carbonate co-exchange mechanism through FTIR and XPS analysis. The column test showed that MgO@ACFF had the potential to be used as a fluoride adsorbent.
Article
Environmental Sciences
Ming-Xiu Zhan, Yu-Wei Liu, Wen-Wen Ye, Tong Chen, Wen-Tao Jiao
Summary: This research focuses on effectively modifying activated carbon with urea to improve its adsorption capacity for dioxins, by enhancing pore structure and introducing nitrogen. The optimized modification led to increased adsorption efficiency, with AC600 showing the highest efficiency at 97.65% for dioxins, while AC800 with more nitrogen-containing groups achieved 85.24% efficiency for low-concentration dioxins.
ENVIRONMENTAL RESEARCH
(2022)
Article
Chemistry, Multidisciplinary
Yongxiang Niu, Chao Zheng, Yucong Xie, Kai Kang, Hua Song, Shupei Bai, Hao Han, Shunyi Li
Summary: Given the characteristics and risks of ammonia, the removal of ammonia is crucial for industrial production and environmental safety. This study modified viscose-based activated carbon fiber (ACF) with nitric acid impregnation to enhance its adsorption capacity for ammonia. The results showed that ACF-N-6 significantly increased the surface functional group content without destroying the physical structure of the activated carbon fibers. The highest adsorption capacity of ammonia by ACFs was 14.08 mmol/L at 293 K, which was a 165% increase compared to ACF-raw. The adsorption performance was strongly correlated with the carboxyl group content and relative humidity of the inlet gas. This research contributes to the development of efficient ammonia adsorption systems for industrial production and environmental safety.
Article
Engineering, Chemical
Ndifreke Etuk Williams, Oluwasuyi Ayobami Oba, Nur Pasaoglulari Aydinlik
Summary: This review explores the use of potassium hydroxide (KOH) in the production and modification of activated carbon. The activation process, carbonization, temperature, activation time, and KOH ratio are discussed, as well as their effects on surface area, surface morphology, and functional groups. The study finds that the pore structure, surface area, and pore size of activated carbon depend on the ratio of KOH, indicating that KOH influences the surface chemistry of the material. Additionally, the review calculates and evaluates the impact of various parameters on sorbent-sorbate interactions.
CHEMBIOENG REVIEWS
(2022)
Article
Chemistry, Multidisciplinary
Vivek Laishram, Potsangbam Albino Kumar
Summary: This study focuses on the adsorption of COD organic matter from pretreated landfill leachate using H3PO4 treated activated carbon derived from Parkia speciosa (Petai) pods (PPAC). The adsorbent was analyzed for morphology and surface characteristics, and the impact of various factors on the adsorption process was considered. The performance of PPAC was compared with other reported adsorbents.
Article
Environmental Sciences
Teck Nam Ang, Brent R. Young, Rob Burrell, Matthew Taylor, Mohamed Kheireddine Aroua, Saeid Baroutian
Summary: This study investigated the effects of surface physical and chemical properties on sevoflurane adsorption by conducting oxidative hydrothermal surface modification of activated carbon. The research found that treatment temperature and duration influenced the adsorption performance, and the re-formation of surface oxygen functionalities may lead to the development of functional groups that improve sevoflurane adsorption.
Article
Engineering, Environmental
Mariana Mariana, H. P. S. Abdul Khalil, E. M. Mistar, Esam Bashir Yahya, Tata Alfatah, Mohammed Danish, Mousa Amayreh
Summary: Contamination of water with heavy metals is a global issue, and activated carbon has drawn attention for its high adsorption capacity against heavy metals. Recent advances have focused on modifying activated carbon to improve its adsorption performance through physical, chemical, organic, and inorganic loading techniques.
JOURNAL OF WATER PROCESS ENGINEERING
(2021)
Article
Chemistry, Multidisciplinary
Qi Zhang, Xiang C. Ma, Chang He, Qing L. Chen, Bing J. Zhang
Summary: Modification of raw activated carbon using chemical solvents, such as triethylenetetramine, can enhance its adsorption performance. Liquid impregnation experiments were conducted to investigate the adsorption of triethylenetetramine on activated carbon for modification. The Langmuir isotherm model and pseudo-first-order kinetic model fitted well with the experimental data, with R2 values of 0.9883 and 0.9954, respectively. The adsorption process was found to be spontaneous, endothermic, and monolayer physical adsorption.
Article
Engineering, Environmental
Yaowei Huang, Qiongfen Yu, Ming Li, Shaoxuan Jin, Jie Fan, Le Zhao, Zhaohui Yao
Summary: The surface modification of activated carbon fiber (ACF) using low-temperature oxygen plasma technology (LTOP) can enhance water vapor adsorption performance, especially under low relative humidity conditions (RH less than 40%).
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Physical
Ilknur Demiral, Canan Samdan, Hakan Demiral
Summary: This study synthesized activated carbon from peach stones and fruit juice industrial wastes, enriching the surface functional groups through HNO3 oxidation. Acid modification significantly affected the surface area and pore structures of the activated carbon, leading to collapse of micropores and an increase in mesopores. By utilizing 69% nitric acid modification, the activated carbon showed increased diversity in surface functional groups and total surface acidity.
SURFACES AND INTERFACES
(2021)
Article
Engineering, Environmental
Yang Yue, Yanxiang Wang, Ce Qu, Xiaodan Xu
Summary: This study investigated the use of modified PAN-ACF, PAN-ACF/TiO2, and PAN-ACF/ZnO adsorbents for the removal of PNP pollutants in wastewater, with adsorption efficiency up to 98.05%. Additionally, ACFs loaded with nano-TiO2 and nano-ZnO photocatalysts exhibited high photocatalytic degradation rates of PNP under UV light irradiation, reaching 99.85% and 98.31% respectively.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Green & Sustainable Science & Technology
Huijuan Gong, Shuyu Zhou, Zezhi Chen, Lu Chen
Article
Engineering, Chemical
Honglei Pang, Zezhi Chen, Huijuan Gong, Mengfan Du
JOURNAL OF MEMBRANE SCIENCE
(2020)
Article
Engineering, Environmental
Yuchen Zhou, Zezhi Chen, Huijuan Gong, Xiaoshu Wang, Huiqiang Yu
Article
Chemistry, Physical
Shuyu Zhou, Zezhi Chen, Huijuan Gong, Xiaoshu Wang, Tingting Zhu, Yuchen Zhou
APPLIED CATALYSIS A-GENERAL
(2020)
Article
Engineering, Chemical
Zezhi Chen, Qi Shen, Huijuan Gong, Mengfan Du
SEPARATION AND PURIFICATION TECHNOLOGY
(2020)
Article
Engineering, Environmental
Yuchen Zhou, Zezhi Chen, Huijuan Gong, Lu Chen, Huiqiang Yu
Summary: Using monolithic catalysts with larger size than biomass feedstock can improve gas production and simplify the separation process of catalyst and char in in-situ catalytic biomass pyrolysis. This approach not only enhances catalytic performance, but also increases the efficiency of energy recovery in biomass.
Article
Green & Sustainable Science & Technology
Yuchen Zhou, Zezhi Chen, Huijuan Gong, Ziyi Yang
Summary: Thermal decomposition is a promising technology for tannery sludge disposal, where different processes were simulated to investigate the transformation of Cr species. The study found that pyrolysis is the safest method for Cr fixation and reuse.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Chemistry, Physical
Shuyu Zhou, Zezhi Chen, Huijuan Gong, Lu Chen, Huiqiang Yu
Summary: In this study, three-dimensional ordered macro/mesoporous Ce0.8Zr0.1M0.1 solid solutions were prepared as the carriers for Ni/Ce0.8Zr0.1M0.1 catalysts to catalyze the steam reforming of toluene (SRT). The results showed that the Ni/Ce0.8Zr0.1M0.1 catalysts exhibited excellent low-temperature catalytic activity, with Ni/Ce0.8Zr0.1Pr0.1 catalyst showing the highest toluene conversion rate.
Article
Chemistry, Physical
Ziyi Yang, Zezhi Chen, Huijuan Gong, Xiaoshu Wang
Summary: CuO was successfully introduced into activated carbon to improve its adsorption performance on Octamethylcyclotetrasiloxane (D4). Adsorption experiments and theoretical calculations demonstrated that CuO/AC composite had the best adsorption performance on D4, with higher adsorption energy and more charge transfer. IGMH analysis confirmed the adsorption of D4 on CuO surface through C-H-Cu hydrogen bond.
APPLIED SURFACE SCIENCE
(2022)
Article
Thermodynamics
Yuchen Zhou, Xiangwei Ma, Zezhi Chen, Huijuan Gong, Lu Chen, Huiqiang Yu
Summary: Volatile organic compounds (VOCs) are major air pollutants. This study proposes a novel strategy of converting recovered VOCs into syngas and using the syngas as fuel for power generation. Thermodynamic simulations and experiments show that this strategy can improve the utilization efficiency of VOCs.
Article
Energy & Fuels
Xinyu Yang, Zezhi Chen, Huijuan Gong, Feng Lin, Tingting Zhu, Ziyi Yang
Summary: Using a solid superacid catalyst Pt/SO42-/Al2O3 can realize the deoxygenation of LFG, and it has higher activity and lower reaction temperature compared to Pt/gamma-Al2O3 catalyst. Sulfation increases the number of acid sites on the γ-Al2O3 support and enhances the activity of Pt species. In addition, the Pt/SO42-/Al2O3 catalyst maintains stable activity after multiple tests.
Article
Agricultural Engineering
Xinyu Yang, Zezhi Chen, Lu Chen, Huiqiang Yu, Huijuan Gong
Summary: Upgrading landfill gas (LFG) to bio-methane is a feasible solution to utilize its energy and address environmental pollution caused by its emissions. This study developed Cu/H-ZSM-5 zeolites with different copper content and demonstrated their excellent catalytic activity in removing oxygen from simulated LFG. The findings provide valuable insights for the development of cost-effective and high-performance LFG deoxygenation catalysts.
BIOMASS & BIOENERGY
(2023)
Article
Chemistry, Physical
Yuchen Zhou, Yu Wang, Zezhi Chen, Huijuan Gong, Lu Chen, Huiqiang Yu
Summary: The researchers found that catalysts based on ZIF-8 could significantly enhance CO2 absorption in water and alkaline solutions, and showed good reusability. Furthermore, catalysts based on ZIF-8-TA exhibited even higher CO2 absorption rates and mimicked the activity of natural carbonic anhydrase. These findings provide a new direction for the development of low-cost and efficient CO2 absorption materials.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Multidisciplinary
Feng Lin, Zezhi Chen, Huijuan Gong, Xiaoshu Wang, Lu Chen, Huiqiang Yu
Summary: Ni/Ce0.8Zr0.2O2 nanorods were developed as an efficient Ni-based steam reforming catalyst for tar removal from biomass gasification products. The 5Ni/Ce0.8Zr0.2O2 nanorod catalyst achieved 100% toluene conversion at 600 degrees C with high catalytic activity and coking resistance. The excellent catalytic performance was attributed to the strong metal-support interaction between Ni and the {100} facet of Ce0.8Zr0.2O2, allowing Ni atoms to anchor to surface oxygen vacancies and maintain its reduced state.
Article
Chemistry, Multidisciplinary
Tingting Zhu, Zezhi Chen, Huijuan Gong, Huiqiang Yu, Ping Ning, Shuyu Zhou, Yuchen Zhou
NEW JOURNAL OF CHEMISTRY
(2020)
Article
Green & Sustainable Science & Technology
Cameron Bracken, Nathalie Voisin, Casey D. Burleyson, Allison M. Campbell, Z. Jason Hou, Daniel Broman
Summary: This study presents a methodology and dataset for examining compound wind and solar energy droughts, as well as the first standardized benchmark of energy droughts across the Continental United States (CONUS) for a 2020 infrastructure. The results show that compound wind and solar droughts have distinct spatial and temporal patterns across the CONUS, and the characteristics of energy droughts are regional. The study also finds that compound high load events occur more often during compound wind and solar droughts than expected.
Article
Green & Sustainable Science & Technology
Ning Zhang, Yanghao Yu, Jiawei Wu, Ershun Du, Shuming Zhang, Jinyu Xiao
Summary: This paper provides insights into the optimal configuration of CSP plants with different penetrations of wind power by proposing an unconstrained optimization model. The results suggest that large solar multiples and TES are preferred in order to maximize profit, especially when combined with high penetrations of wind and photovoltaic plants. Additionally, the study demonstrates the economy and feasibility of installing electric heaters (EH) in CSP plants, which show a linear correlation with the penetration of variable energy resources.
Article
Green & Sustainable Science & Technology
M. Szubel, K. Papis-Fraczek, S. Podlasek
Article
Green & Sustainable Science & Technology
J. Silva, J. C. Goncalves, C. Rocha, J. Vilaca, L. M. Madeira
Summary: This study investigated the methanation of CO2 in biogas and compared two different methanation reactors. The results showed that the cooled reactor without CO2 separation achieved a CO2 conversion rate of 91.8%, while the adiabatic reactors achieved conversion rates of 59.6% and 67.2%, resulting in an overall conversion rate of 93.0%. Economic analysis revealed negative net present worth values, indicating the need for government monetary incentives.
Article
Green & Sustainable Science & Technology
Yang Liu, Yonglan Xi, Xiaomei Ye, Yingpeng Zhang, Chengcheng Wang, Zhaoyan Jia, Chunhui Cao, Ting Han, Jing Du, Xiangping Kong, Zhongbing Chen
Summary: This study investigated the effect of using nanofiber membrane composites containing Prussian blue-like compound nanoparticles (PNPs) to relieve ammonia nitrogen inhibition of rural organic household waste during high-solid anaerobic digestion and increase methane production. The results showed that adding NMCs with 15% PNPs can lower the concentrations of volatile fatty acids and ammonia nitrogen, and increase methane yield.
Article
Green & Sustainable Science & Technology
Zhong Ge, Xiaodong Wang, Jian Li, Jian Xu, Jianbin Xie, Zhiyong Xie, Ruiqu Ma
Summary: This study evaluates the thermodynamic, exergy, and economic performance of a double-stage organic flash cycle (DOFC) using ten eco-friendly hydrofluoroolefins. The influences of key parameters on performance are analyzed, and the advantages of DOFC over single-stage type are quantified.
Article
Green & Sustainable Science & Technology
Nicolas Kirchner-Bossi, Fernando Porte-Agel
Summary: This study investigates the optimization of power density in wind farms and its sensitivity to the available area size. A novel genetic algorithm (PDGA) is introduced to optimize power density and turbine layout. The results show that the PDGA-driven solutions significantly reduce the levelized cost of energy (LCOE) compared to the default layout, and exhibit a convex relationship between area and LCOE or power density.
Article
Green & Sustainable Science & Technology
Chunxiao Zhang, Dongdong Li, Lin Wang, Qingpo Yang, Yutao Guo, Wei Zhang, Chao Shen, Jihong Pu
Summary: In this study, a novel reversible liquid-filled energy-saving window that effectively regulates indoor solar radiation heat gain is proposed. Experimental results show that this window can effectively reduce indoor temperature during both summer and winter seasons, while having minimal impact on indoor illuminance.
Article
Green & Sustainable Science & Technology
Alessandro L. Aguiar, Martinho Marta-Almeida, Mauro Cirano, Janini Pereira, Leticia Cotrim da Cunha
Summary: This study analyzed the Brazilian Equatorial Shelf using a high-resolution ocean model and found significant tidal variations in the area. Several hypothetical barrages were proposed with higher annual power generation than existing barrages. The study also evaluated the installation effort of these barrages.
Article
Green & Sustainable Science & Technology
Francesco Superchi, Nathan Giovannini, Antonis Moustakis, George Pechlivanoglou, Alessandro Bianchini
Summary: This study focuses on the optimization of a hybrid power station on the Tilos island in Greece, aiming to increase energy export and revenue by optimizing energy fluxes. Different scenarios are proposed to examine the impact of different agreements with the grid operator on the optimal solution.
Article
Green & Sustainable Science & Technology
Peimaneh Shirazi, Amirmohammad Behzadi, Pouria Ahmadi, Sasan Sadrizadeh
Summary: This research presents two novel energy production/storage/usage systems to reduce energy consumption and environmental effects in buildings. A biomass-fired model and a solar-driven system integrated with photovoltaic thermal (PVT) panels and a heat pump were designed and assessed. The results indicate that the solar-based system has an acceptable energy cost and the PVT-based system with a heat pump is environmentally superior. The biomass-fired system shows excellent efficiency.
Article
Green & Sustainable Science & Technology
Zihao Qi, Yingling Cai, Yunxiang Cui
Summary: This study aims to investigate the operational characteristics of the solar-ground source heat pump system (SGSHPS) in Shanghai under different operation modes. It concludes that tandem operation mode 1 is the optimal mode for winter operation in terms of energy efficiency.
Article
Green & Sustainable Science & Technology
L. Bartolucci, S. Cordiner, A. Di Carlo, A. Gallifuoco, P. Mele, V. Mulone
Summary: Spent coffee grounds are a valuable biogenic waste that can be used as a source of biofuels and valuable chemicals through pyrolysis and solvent extraction processes. The study found that heavy organic bio-oil derived from coffee grounds can be used as a carbon-rich biofuel, while solvent extraction can extract xantines and p-benzoquinone, which are important chemicals for various industries. The results highlight the promising potential of solvent extraction in improving the economic viability of coffee grounds pyrolysis-based biorefineries.
Article
Green & Sustainable Science & Technology
Luiza de Queiroz Correa, Diego Bagnis, Pedro Rabelo Melo Franco, Esly Ferreira da Costa Junior, Andrea Oliveira Souza da Costa
Summary: Building-integrated photovoltaics, especially organic solar technology, are important for reducing greenhouse gas emissions in the building sector. This study analyzed the performance of organic panels laminated in glass in a vertical installation in Latin America. Results showed that glass lamination and vertical orientation preserved the panels' performance and led to higher energy generation in winter.
Article
Green & Sustainable Science & Technology
Zhipei Hu, Shuo Jiang, Zhigao Sun, Jun Li
Summary: This study proposes innovative fin arrangements to enhance the thermal performance of latent heat storage units. Through optimization of fin distribution and prediction of transient melting behaviors, it is found that fin structures significantly influence heat transfer characteristics and melting behaviors.
