Article
Green & Sustainable Science & Technology
Zihan Chen, Ren He
Summary: This paper investigates the effects of pore size, functional groups, and water content on the adsorption performance of activated carbon for four gasoline evaporation volatile organic compounds (VOCs) through molecular simulation. The results show that capillary condensation increases the equilibrium adsorption capacity, while functional groups and water molecules reduce the effective adsorption volume. The threshold pressure depends on interaction energy and the number of adsorption sites, with the lowest threshold pressure observed for all VOCs. The presence of functional groups and water molecules increases the threshold pressure for n-butane, n-hexane, and p-xylene, while functional group modification and a certain amount of water molecules enhance the adsorption capacity of ethanol at low pressure.
ENVIRONMENTAL PROGRESS & SUSTAINABLE ENERGY
(2023)
Article
Biochemical Research Methods
Zihan Chen, Ren He
Summary: This study investigates the adsorption competition characteristics between multi-component gases at different pressures by using molecular simulation method. The results show that the selectivity of activated carbon to toluene is negatively correlated with the adsorption pressure, while the opposite is true for ethanol. The competitive order of the three VOCs is toluene > cyclohexane > ethanol at low pressure, which becomes ethanol > toluene > cyclohexane at high pressure.
JOURNAL OF MOLECULAR GRAPHICS & MODELLING
(2023)
Article
Engineering, Environmental
Baogen Liu, Lingyun Yu, Huijun Wang, Xiancheng Ma, Zheng Zeng, Liqing Li
Summary: This study reveals the influence of oxygen doping on the surface heterogeneity and adsorption performance of volatile organic compounds (VOCs) through adsorption experiments and theoretical calculations. The results show that oxygen doping can significantly change the charge distribution on the carbon surface and enhance the adsorption capacity of methanol and acetone. The study also investigates the synergistic effect of oxygen-containing functional groups and finds no obvious synergistic effect.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Multidisciplinary
Susilawati, Yuan Alfinsyah Sihombing, Siti Utari Rahayu, Lilik Waldiansyah, Yuni Yati Br Sembiring
Summary: This study investigates the potential use of activated charcoal synthesized from cocoa shells waste and nanosize natural zeolite as an adsorber to increase the concentration of bioethanol. The results show that the activated zeolite produced has a small particle size and high water absorption capacity, leading to a significant increase in bioethanol concentration after 45 minutes of contact with water vapor.
Article
Engineering, Chemical
Zhirui Li, Yuqi Jin, Tong Chen, Feng Tang, Jie Cai, Jiayu Ma
Summary: The hydrophobic modification of activated carbon using TEOS and TMCS can enhance the selectivity of VOCs and improve adsorption performance at high humidity, resulting in better toluene adsorption capacity and increased water contact angle.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Environmental Sciences
Tangying Cheng, Jinjin Li, Xiuwei Ma, Lei Zhou, Hao Wu, Linjun Yang
Summary: The study focused on the control of low-concentration VOCs in coal-fired flue gas. Activated carbons were prepared from agricultural wastes using K2CO3 and K2CO3-KCl, with PSAC-2 showing the best adsorption performance for the target VOCs, especially phenol. The adsorption process was found to involve both physical and chemical adsorption, with physical adsorption being dominant and chemical adsorption being minor.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Energy & Fuels
Jinjin Li, Tangying Cheng, Hao Wu, Linjun Yang
Summary: This study developed a novel route to synthesize graphitic resin-based activated carbon (GRC) and investigated its selective adsorption behaviors of VOCs/water vapor. The obtained GRC showed outstanding graphitization degree, lower O content, and hierarchical pore structure, leading to high dynamic adsorption capacity. The competitive adsorption mechanism was explored from the perspective of surface oxygen groups and pore size, revealing that lower surface oxygen groups content contributed to the excellent adsorption selectivity.
Article
Materials Science, Paper & Wood
Jiakai He, Yuanyuan Zhao, Yun Zhou, Shubin Wu
Summary: Hemicellulose was extracted from poplar using the KOH method, and activated carbons with high VOCs adsorption capacity were prepared using the extracted residue as the carbon precursor and KOH as the activator. The pre-extraction of hemicellulose did not significantly affect the removal efficiency and pore structure of activated carbons. The removal of hemicellulose greatly improved the VOC adsorption capacity of activated carbons by increasing the percentage of micropores.
Article
Engineering, Chemical
Morteza Davarpanah, Zaher Hashisho, David Crompton, James E. Anderson
Summary: The present study investigates the application of a metal-organic framework for the adsorption of toluene in an industrial fluidized bed adsorber. A steady-state model is used to analyze the effect of design and operating parameters on the overall removal efficiency and partial pressure profile along the bed. The performance of different adsorbent materials is compared, and suggestions for improving the removal efficiency for low-density adsorbents are provided.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Engineering, Environmental
Xiao Wei, Shiyong Wu, Pengbo Liu, Sheng Huang, Xueqin Li, Jinhui Yang, Youqing Wu
Summary: This study characterized the physicochemical properties of activated carbons (ACs) prepared from penicillin mycelial residues (PMR) and explored their adsorption performance for VOCs. The results showed that AC230-1 had the largest specific surface area (2187.50 m2/g), while AC290-0.5 had the largest microporous surface area (1624.81 m2/g). The increase of KOH ratio led to a gradual decrease in microporous surface area and the development of larger micropores and mesopores. AC290-0.5 exhibited better graphite microcrystalline structure and stability. ACs had similar surface functional groups, and AC290-0.5 contained more C--O, C-OH, and abundant N-containing functional groups, enhancing its adsorption capacity for VOCs. AC290-0.5 showed the highest saturation adsorption capacities for DCM, TCE, and CLB. The Y-N model fitted the adsorption breakthrough curve well, and the adsorption kinetics indicated mainly physical adsorption. The microporous and surface chemical groups of AC were the main factors determining its adsorption capacity for VOCs.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Chemistry, Multidisciplinary
Yufeng Zhao, Mengxi Zhang, Chen Yang, Ruyi Xiang, Xudong Yang, Longzhe Cui
Summary: In this study, the pp-LFER model was successfully developed to quantify the interactions between VOCs and AC, and predict the adsorption capacity of AC for VOCs. The established model shows good performance in predicting PC and ln q values, with high predictive accuracy.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2022)
Article
Engineering, Environmental
Yongsheng Jia, Donghang Chen, Zhongyu Jiang, Xiaolong Wang, Zhaoyu Zhou, Long Zhao, Limin Guo
Summary: This study investigates the conversion of CO2 into activated carbon (AC) and its application for the adsorption of volatile organic compounds (VOCs). The results show that the prepared ACs have a rich internal pore structure, and their adsorption capacity is positively correlated with their pore structures and surface chemistry.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2023)
Article
Chemistry, Multidisciplinary
Fu Yang, Yutong Lu, Wenhao Li, Wenlong Tu, Lulu Li, Xuyu Wang, Aihua Yuan, Jianming Pan
Summary: This study optimized the preparation method of waste biomass-derived activated carbon adsorbents, resulting in activated carbon with excellent structural properties and superior adsorption capacity. The adsorption properties were found to be directly related to the total pore volume and Langmuir surface area of the adsorbent. The obtained BC-1 adsorbent showed significantly higher adsorption capacity for benzene and toluene compared to industrial activated carbon, with enhanced adsorption selectivity under humid conditions.
Article
Biotechnology & Applied Microbiology
Aniyohana Valencia, Roberto Muniz-Valencia, Silvia G. Ceballos-Magana, Cintia Karina Rojas-Mayorga, Adrian Bonilla-Petriciolet, Jorge Gonzalez, Ismael Alejandro Aguayo-Villarreal
Summary: New activated carbons were prepared from coconut shell to separate benzene and cyclohexane. The best preparation conditions were identified using a Taguchi experimental design. The activating agent, impregnation ratio, and physical activation time were found to be the most important variables. The activated carbon obtained with ZnCl2 showed the highest adsorption properties for benzene and cyclohexane separation at an industrial level.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2022)
Review
Green & Sustainable Science & Technology
Shuangjun Li, Xiangzhou Yuan, Shuai Deng, Li Zhao, Ki Bong Lee
Summary: CO2 adsorption capture technology using biomass-derived materials is considered a cost-effective and environmentally friendly method for mitigating climate change. From a thermodynamic perspective, this method is preferred and feasible for commercial-scale applications.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2021)