Article
Engineering, Chemical
Hojatollah Moradi, Hedayat Azizpour, Mohammad Mohammadi
Summary: In this study, the adsorption behavior of propane and propylene mixture on Chabazite (CHA) zeolite was investigated using molecular dynamics simulation. The presence of Na+ and Ca2+ cations was found to affect the adsorption of propylene, while the K+ cation decreased the adsorption capacity of propylene.
Article
Engineering, Chemical
Flor R. Siperstein, Carlos Avendano, Jordan J. Ortiz, Alejandro Gil-Villegas
Summary: Analytic expressions for isosteric heats of adsorption are derived for commonly used isotherm models and a two-dimensional molecular equation of state based on the SAFT-VR approach. The predicted isosteric heat of adsorption exhibits strong variations in regions where experimental data is insufficient.
Article
Energy & Fuels
Ziwei Wang, Yong Li, Zhuangsen Wang, Leixin Zhou
Summary: Temperature and pore structure and properties have an effect on adsorption capacity. The adsorption capacity of coal decreases with increasing temperatures, with the maximum volume adsorbed being 11.77-33.34 cm(3)/g at 20°C and 9.87-28.99 cm(3)/g at 100°C. Coals are dominated by 0.3-0.8nm micropores, and the variation in isosteric heat of adsorption is influenced by coal surface roughness and intermolecular forces.
Article
Green & Sustainable Science & Technology
Kang Hun Kim, Moon Hyeon Kim
Summary: This study investigated the single-component adsorption of CO2, CO, N-2, and H-2 using different adsorbents. The results showed that the surface features and molecular properties of the adsorbents have a significant impact on the adsorption process, and the selectivity of CO2 varies with different adsorbents.
Article
Thermodynamics
Bo Han, Anutosh Chakraborty
Summary: Metal organic frameworks (MOFs) are promising materials for achieving cooling, heating, and water desalination with zero or negligible carbon footprint. This article investigates the water adsorption and desorption characteristics of different functional group-assisted MOFs in the adsorption heat transformation (A-HT) process, and evaluates their performance in terms of cooling, heating, and desalination capacities.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Chemistry, Physical
Xiaonan Wang, Xiang Li, Junni Yang
Summary: This study investigated the effect of different types of surfactants adsorption characteristics on the wettability of coking coal dust. The experimental results showed that the adsorption isotherms of the cationic surfactant DDBAC, anionic surfactant AES, and non-ionic surfactant CDEA on the coal dust surface were bilayer LS-type, L-type, and S-type, respectively. The amount of AES adsorbed on the coal dust surface was estimated to be 64.9 mg/g at a concentration of 0.05%, which was significantly higher than DDBAC (15.5 mg/g) and CDEA (29.5 mg/g). The relationship between the amount of surfactant adsorbed and the contact angle on the coal dust surface was highly correlated. The findings provide a theoretical basis for the selection of surfactants to improve the coal dust suppression efficiency.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Engineering, Environmental
Rafay Ahmed, Guijian Liu, Balal Yousaf, Abdul Rehman, Mehr Ahmed Mujtaba Munir, Samina Irshad, Muhammad Saqib Rashid, Ayesha Imtiyaz Cheema
Summary: Nitrogen-doped carbonaceous adsorbents with high ultra-microporous structure were successfully synthesized in this study, showing the highest CO2 adsorption value at 700 degrees C due to the synergistic effect of nitrogen, high specific surface area, and micropore volume. The heterogeneous nature of the adsorbent, along with a strong interaction between the adsorbent and adsorbate, contributed to the high CO2 uptake efficiency.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Chemistry, Physical
Paloma M. Frias-Urena, Maximiliano Barcena-Soto, Eulogio Orozco-Guareno, Alberto Gutierrez-Becerra, Josue D. Mota-Morales, Karina Chavez, Victor Soto, Jose A. Rivera-Mayorga, Jose I. Escalante-Vazquez, Sergio Gomez-Salazar
Summary: The stoichiometry of hexacyanoferrate materials affects their porosity properties and CO2 capture applications. Varying amounts of Co ions and oxidation states of transition metals affect the structures of mesoporous K or Na-cobalt hexacyanoferrates (CoHCFs) and CO2 removal. The results demonstrate that CoHCFs have practical implications in CO2 capture and flue gas separations.
Review
Engineering, Environmental
Chong Yang Chuah, Hongju Lee, Tae-Hyun Bae
Summary: This review focuses on the recent progress of nanoporous adsorbents developed for light hydrocarbon separation, which is classified into acetylene separation, alkene/alkane separation, and propyne separation. Adsorptive separation is considered a promising technique with lower energy consumption than conventional processes.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Physical
Shashwat Srivastava, Sachin P. Shet, S. Shanmuga Priya, K. Sudhakar, Muhammad Tahir
Summary: Metal organic frameworks (MOFs) are widely used in adsorption and separation due to their porous nature and high surface area. In this study, hydrogen adsorption in four copper MOFs was analyzed using molecular simulation. The results showed that PCN-60 exhibited high hydrogen uptake at both 298 K and 77 K.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Green & Sustainable Science & Technology
Haijian Li, Qiang Zeng, Jianhong Kang, Gang Cheng, Jianwei Cheng, Shengcheng Wang
Summary: This study investigated the adsorption mechanism of carbon dioxide, oxygen, and nitrogen in coal. The adsorption amounts and adsorption heat values were determined for four different coal samples. Results showed that the adsorption isotherms of carbon dioxide followed the Langmuir equation, while oxygen and nitrogen followed Henry's law. The adsorption amounts of all gases decreased with increasing temperature, with the rate of change determined by the adsorption heat. The pore structure and chemical composition of coal were found to influence the adsorption heat. Micropores and mesopores were identified as the main determinants of gas adsorption amounts. The adsorption heat of nitrogen correlated positively with the pore structure, while the adsorption heat of oxygen correlated positively with the ash, elemental nitrogen, elemental sulfur, and mineral contents of the coal. The adsorption heat of carbon dioxide correlated positively with the elemental sulfur content of the coal.
Article
Chemistry, Physical
Quang K. Loi, Krittamet Phothong, Ryuto Yuasa, Toshihide Horikawa, D. D. Do
Summary: The adsorption mechanism of ethanol on graphite was comprehensively investigated using experimental measurements and computer simulation. The study highlights the unique interplay of clustering and molecular layering of ethanol. Ethanol exhibits intermediate characteristics between simple gases and water during adsorption. The mechanism of ethanol adsorption involves the formation and growth of discrete clusters, predominantly in the form of tetramers and pentamers, followed by the coalescence of growing clusters. The interplay of clustering and coalescence depends on temperature.
Article
Nanoscience & Nanotechnology
Pamela Ramirez-Vidal, Rafael L. S. Canevesi, Giuseppe Sdanghi, Sebastien Schaefer, Gael Maranzana, Alain Celzard, Vanessa Fierro
Summary: This study investigated hydrogen adsorption on six commercial activated carbons under different temperature and pressure conditions. The authors found that the use of nonlocal density functional theory provided a more accurate prediction of hydrogen adsorption capacity. The relationship between hydrogen adsorption capacity and surface properties of activated carbons was established, and different parameters were identified for evaluating the best activated carbon for hydrogen storage or compression.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Multidisciplinary
R. Guo, Y. -S Tseng, I. Retita, G. Bahmanrokh, B. Arkhurst, S. L. I. Chan
Summary: This study investigated the reversible hydrogen storage of graphitic carbon nitride (g-C3N4) nanotubes at room temperature, and compared it with multiwalled carbon nanotubes (MWCNT), bulk g-C3N4, and g-C3N4 nanosheets. The g-C3N4 nanotubes exhibited a higher room temperature hydrogen storage capacity (0.78 wt%) compared to MWCNT (0.46 wt%), bulk g-C3N4 (0.51 wt%), and g-C3N4 nanosheets (0.73 wt%), despite the highest specific surface area of g-C3N4 nanosheets (161 m2/g). Temperature programming desorption (TPD) analysis revealed that chemisorption contributed to the high storage capacity of g-C3N4 nanotubes.
MATERIALS TODAY CHEMISTRY
(2023)
Article
Energy & Fuels
Hang Long, Hai-fei Lin, Min Yan, Yang Bai, Xiao Tong, Xiang-guo Kong, Shu-gang Li
Summary: The research found that with the increase of pore size, the gas loading amount in the pore model increased, but the tight adsorption amount and adsorption heat decreased. The order of CO2 > CH4 > N2 is the arrangement order of tight adsorption amount, loading amount and adsorption heat. The diffusion characteristics of the three gases in the pores are CH4 > N2 > CO2, and larger pores are more conducive to gas diffusion.
Article
Energy & Fuels
Xu Tang, Nino Ripepi, Ellen Gilliland
GREENHOUSE GASES-SCIENCE AND TECHNOLOGY
(2016)
Letter
Energy & Fuels
Xu Tang
Article
Engineering, Chemical
Gaowei Yue, Zhaofeng Wang, Ce Xie, Xu Tang, Junwei Yuan
TRANSPORT IN POROUS MEDIA
(2017)
Article
Energy & Fuels
Nino Ripepi, Kyle Louk, Joseph Amante, Charlies Schlosser, Xu Tang, Ellen Gilliland
Review
Energy & Fuels
Xu Tang, Nino Ripepi, Kray Luxbacher, Eleanor Pitcher
Article
Energy & Fuels
Xu Tang, Nino Ripepi, Nicholas P. Stadie, Lingjie Yu
Article
Energy & Fuels
Xu Tang, Nino Ripepi, Katherine A. Valentine, Cigdem Keles, Timothy Long, Aleksandra Gonciaruk
Article
Energy & Fuels
Kyle Louk, Nino Ripepi, Kray Luxbacher, Ellen Gilliland, Xu Tang, Cigdem Keles, Charles Schlosser, Ed Diminick, Steve Keim, Joseph Amante, Karmis Michael
JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING
(2017)
Article
Chemistry, Multidisciplinary
Xu Tang, Nino Ripepi
JOURNAL OF CO2 UTILIZATION
(2017)
Article
Energy & Fuels
Zhaofeng Wang, Xu Tang
Article
Energy & Fuels
Zhaofeng Wang, Weiwei Su, Xu Tang, Jiahao Wu
INTERNATIONAL JOURNAL OF COAL GEOLOGY
(2018)
Article
Energy & Fuels
Xu Tang
Article
Chemistry, Multidisciplinary
Xu Tang, Nino Ripepi, Sean Rigby, Robert Mokaya, Ellen Gilliland
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2019)
Article
Energy & Fuels
Xinyu Tan, Ellen Gilliland, Xu Tang, Nino Ripepi
Summary: The study found that with the maturation process, the chemical structure of shale changes, and the mechanical properties of organic components also increase. Atomic force microscopy studies show that organic matter in shale exhibits significant heterogeneity in mechanical properties.
Article
Mining & Mineral Processing
Qi Lingling, Tang Xu, Wang Zhaofeng, Peng Xinshan
INTERNATIONAL JOURNAL OF MINING SCIENCE AND TECHNOLOGY
(2017)
