Article
Chemistry, Physical
Pawel P. Ziemianski, Arkadiusz Derkowski
Summary: This study investigates the adsorption of H-2 on clay minerals in rocks, revealing that the adsorption capacity depends on the mineral texture rather than its structure. The majority of H-2 is adsorbed in micropores accessible to CO2 and also intercalates in smectitic interlayers. This enhances the gas storage capacity of the rocks.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Energy & Fuels
Palash Ghosh, Basanta Kumar Prusty, Pavitra Sandilya, Venkata Yasaswy Turlapati
Summary: Researchers studied the adsorption characteristics of gaseous hydrogen on different clay minerals under low-pressure-low-temperature and high-pressure-high-temperature conditions. They analyzed the pore morphology and structure of the clay samples and found that specific surface area and micropore volume have a positive effect on hydrogen adsorption, while average pore width has a negative effect. The Langmuir model did not fit well, but the Toth and Sips models provided good fits at both experimental conditions.
Article
Multidisciplinary Sciences
Lin Hong, Wenjing Wang, Dameng Gao, Wentong Liu
Summary: This study investigated the occurrence and migration of coalbed methane in coals of different ranks and revealed the microscopic reservoir space and mechanism of coalbed methane. The results showed that the proportion of N-2 molecules in low-rank coals in the form of micropore filling and monolayer adsorption was higher than that in high-rank coals. The critical pressure and pore size for micropore filling exhibited U-shaped correlations with the coal rank.
Article
Food Science & Technology
Durmus Sert, Emin Mercan, Mehmet Kilinc
Summary: High-pressure homogenisation increased the hardness and consistency of buffalo milk ice cream, improved its color, reduced the size of air bubbles, decreased the overrun of ice cream, and enhanced the resistance to melting.
LWT-FOOD SCIENCE AND TECHNOLOGY
(2021)
Article
Engineering, Chemical
N. Flores-Alamo, M. J. Solache-Rios, C. G. Aguirre-Malvaez, F. Cuellar-Robles, M. C. Carreno-De Leon
Summary: Novel adsorbent materials were prepared from sodium alginate and polyvinyl alcohol (AL-PVA) in different ratios and evaluated for their adsorption capacities for Pb(II), Cu(II), and Zn(II). The material with a ratio of 50/50 showed the highest efficiency and exhibited good adsorption kinetics and isotherm characteristics. Therefore, this adsorbent material has high potential for the removal of Pb(II), Cu(II), and Zn(II) from wastewater.
DESALINATION AND WATER TREATMENT
(2022)
Article
Chemistry, Physical
Y. E. Divo-Matos, R. C. Cruz-Rodriguez, L. Reguera, E. Reguera
Summary: This contribution presents a new model for gas adsorption isotherm at high pressures, derived from the Redlich-Kwong's equation of state, which considers the adsorption space as a fitting parameter unlike the frequently used Zhou model. The proposed model is validated through comparison with hydrogen adsorption isotherms in various porous solids, and the effects of model parameters on the isotherm shape are discussed in detail. This model has potential applications for evaluating adsorption data for gases above their critical temperature, particularly for hydrogen adsorption in porous solids.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Engineering, Environmental
Lei Chen, Keyu Liu, Shu Jiang, Hexin Huang, Jingqiang Tan, Luo Zuo
Summary: The study evaluated the accuracy of different methods for methane excess adsorption correction using the Polanyi adsorption potential theory. The results suggest that an adsorbed phase density around 0.30 g/cm³ to 0.40 g/cm³ may yield results close to the actual adsorption. Comparing the results with previous studies on methane adsorption on shale further supported the conclusions in this study.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Multidisciplinary
Chengyu Liang, Wei Xiong, Meiling Wang, David S. K. Ting, Rupp Carriveau, Zhiwen Wang
Summary: Underwater compressed gas energy storage (UW-CGES) is a promising option for energy storage, but liquid accumulation in underwater pipelines poses a challenge. This study investigates the pressure distribution characteristics of liquid accumulation flow in hilly terrain under Zero Net Liquid Flow conditions. The findings can contribute to the development of UW-CGES technology.
APPLIED SCIENCES-BASEL
(2023)
Article
Energy & Fuels
Guojun Yu, Zhenqiang Hu, Yuan Gao, Lizhi Zhang, Chao Yang
Summary: This study proposes a concept for a constant-pressure integrated hydrogen purification and storage system using carbon nanotubes and nanoporous graphene membranes. Molecular dynamics simulations were conducted to investigate purification efficiency and hydrogen storage capacity under different working conditions. The research findings suggest that the system can achieve optimal purification and hydrogen storage performance at specific feed-hydrogen temperature, adsorption temperature, and working pressure, providing a theoretical reference for designing large-capacity hydrogen storage systems.
Article
Green & Sustainable Science & Technology
Viktor Kalman, Johannes Voigt, Christian Jordan, Michael Harasek
Summary: This study investigates the feasibility of hydrogen storage in a depleted gas field and the purification of recovered hydrogen using pressure swing adsorption, achieving high purity hydrogen recovery. Challenges are identified in cycle design with varying feed parameters, but adequate separation performance is demonstrated, supporting the applicability of pressure swing adsorption in seasonal storage.
Article
Chemistry, Physical
Hirotada Fujiwara, Hiroaki Ono, Keiko Ohyama, Masahiro Kasai, Fumitoshi Kaneko, Shin Nishimura
Summary: The study evaluated the impact of hydrogen gas permeability in five types of polyethylene materials under high-pressure environment, revealing that fractures may occur during decompression after exposure to hydrogen gas, and the permeability coefficient decreases with increasing pressure.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Saba Khan, Muhammad Mushtaq, Golibjon R. Berdiyorov, Nacir Tit
Summary: The study examined the suitability of embedding metal atoms (Ca versus Mn) in the pores of C2N as anode materials for metal-ion battery applications using density-functional theory. Results showed that both Ca and Mn atoms have strong interactions with the pyridinic-nitrogen pore. It was found that the DAC-Mn catalyst exceeded the theoretical irreducible capacitance of SAC Ca catalyst, and H-2 molecule exhibited different adsorption behaviors on Ca-catalyst and Mn-catalyst.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Materials Science, Ceramics
P. K. Chauhan, R. Parameshwaran, P. Kannan, R. Madhavaram, R. Sujith
Summary: This study explores the potential of using thermally stable porous silicon oxycarbide ceramics as a material for hydrogen storage. Experimental results show that etching can significantly improve the hydrogen storage performance of the ceramics, with mesopore size being crucial for hydrogen adsorption.
CERAMICS INTERNATIONAL
(2021)
Article
Geosciences, Multidisciplinary
Haihai Hou, Longyi Shao, Yue Tang, Zhen Li, Sheng Zhao, Minglei Yao, Xuetian Wang, Jiaqiang Zhang
Summary: This study focuses on characterizing the pore structure of coal reservoirs in northern China. By utilizing various techniques such as proximate analysis, coal petrology, and nuclear magnetic resonance, the study examines the coal samples from three coalbed methane exploration areas. The results show that coalification and igneous intrusion greatly influence the coal properties, including vitrinite content, pore connectivity, and methane adsorption capacity. The study also reveals the complex variation in pore size distribution and highlights the best target maturity level for CBM exploitation.
Review
Chemistry, Physical
Pamela Ramirez-Vidal, Giuseppe Sdanghi, Alain Celzard, Vanessa Fierro
Summary: Hydrogen, as a promising energy carrier, has the potential to replace fossil fuels and reduce CO2 emissions; however, its low volumetric energy density remains a major drawback. This manuscript reviews different solutions for hydrogen storage, with a particular focus on hydrogen adsorption at cryogenic temperatures and moderate pressures on high surface area porous materials.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Editorial Material
Thermodynamics
J. Ilja Siepmann, Ramesh L. Gardas, David A. Kofke, Ronny Pini, Gabriele Sadowski, Cara E. Schwarz, Jiangtao Wu
JOURNAL OF CHEMICAL AND ENGINEERING DATA
(2021)
Editorial Material
Thermodynamics
J. Ilja Siepmann, Ramesh Gardas, David A. Kofke, Carlos Nieto de Castro, Eugene Paulechka, Ronny Pini, Gabriele Sadowski, Cara E. Schwarz
JOURNAL OF CHEMICAL AND ENGINEERING DATA
(2022)
Article
Engineering, Chemical
Nerine Joewondo, Valeria Garbin, Ronny Pini
Summary: This paper presents a mathematical model that describes the dissolution of spherical bubbles in two-dimensional regular pore networks. The study reveals that network connectivity affects the dissolution time, and the solute concentration field influences the bubble dissolution or growth process.
TRANSPORT IN POROUS MEDIA
(2022)
Article
Chemistry, Physical
Adam Ward, Ronny Pini
Summary: In this study, a traditional analysis was carried out on a set of dynamic breakthrough experiments of the CO2/He system adsorbing onto activated carbon by fitting a 1D dynamic column breakthrough model. Uncertainties in the fitted model parameters were quantified using Bayesian inference techniques, and the robustness of the modeling was assessed by propagating these uncertainties through the dynamic model. It was found that uncertainties in the adsorption isotherm parameters were the main cause of variability in the modeling outputs, and several recommendations were made for practitioners using Bayesian statistical tools.
ADSORPTION-JOURNAL OF THE INTERNATIONAL ADSORPTION SOCIETY
(2022)
Article
Energy & Fuels
Humera Ansari, Shuwei Gong, J. P. Martin Trusler, Geoffrey Maitland, Ronny Pini
Summary: This study presents a hybrid pore-scale model for gas adsorption in shale, using surrogate surfaces to simulate the behavior. The reliability of the model is verified through comparisons with experimental data. The proposed model can reduce the experimental burden and has general applicability.
Article
Thermodynamics
Junyoung Hwang, Hassan Azzan, Ronny Pini, Camille Petit
Summary: The excess adsorption of CO2, CH4, N-2, and H-2 on ZIF-8 was measured in different temperature and pressure ranges, and the adsorption isotherm models were analyzed, along with the microstructure of the adsorbent.
JOURNAL OF CHEMICAL AND ENGINEERING DATA
(2022)
Article
Environmental Sciences
Zitong Huang, Takeshi Kurotori, Ronny Pini, Sally M. Benson, Christopher Zahasky
Summary: This article presents a method for quantifying the heterogeneous multiscale permeability in geologic porous media using positron emission tomography (PET) imaging. By utilizing a trained convolutional neural network (CNN) based on experimental data, accurate and computationally efficient permeability inversion maps can be generated. The results demonstrate the effectiveness of this approach by comparing the network-predicted permeability maps with experimental data.
WATER RESOURCES RESEARCH
(2022)
Article
Chemistry, Physical
Hassan Azzan, Ashwin Kumar Rajagopalan, Anouk L'Hermitte, Ronny Pini, Camille Petit
Summary: This study aims to develop a novel method for characterizing the adsorption properties of individual shaped adsorbents using a small amount of material. The researchers used an experimental dynamic sorption setup and mathematical models to study mass transport, and utilized a derivative-free optimizer to predict model parameters. By testing and validating the method on adsorbents with different properties, it was demonstrated that this approach can rapidly and quantitatively characterize adsorption properties.
CHEMISTRY OF MATERIALS
(2022)
Editorial Material
Thermodynamics
Ronny Pini, Daniel W. Siderius, J. Ilja Siepmann
JOURNAL OF CHEMICAL AND ENGINEERING DATA
(2022)
Article
Engineering, Chemical
Adam Ward, Ronny Pini
Summary: The design of adsorption systems for CO2/N-2 separation in carbon capture applications is challenging and requires multiobjective optimization. Traditional methods using NSGA-II are time-consuming, while a Bayesian optimization algorithm called TSEMO can provide the same solution with significantly less computational time. The use of TSEMO algorithm has led to the design of an efficient carbon capture system. However, when coupled with a data-driven machine learning framework, NSGA-II outperforms the Bayesian approach in terms of computational performance.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2022)
Article
Engineering, Chemical
Anna-Maria Eckel, Rebecca Liyanage, Takeshi Kurotori, Ronny Pini
Summary: Dissolution trapping is an important mechanism for carbon dioxide storage in deep saline aquifers. Previous experiments mainly focused on 2D systems and did not reflect the subsurface CO2/brine system accurately. In this study, we use X-ray computed tomography to investigate the evolution of the convective mixing process in 3D porous media and observe the impact of hydrodynamic dispersion on longitudinal mixing. Our findings suggest that the finger pattern and counter-current flow structure enhance the spread of solute compared to unidirectional dispersion.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Engineering, Chemical
Nerine Joewondo, Valeria Garbin, Ronny Pini
Summary: This study investigates the dissolution of CO2 bubbles in a two-dimensional porous network. The experimental results show the dissolution, growth, or a combination of these processes for different initial liquid supersaturation levels. The pore-network model complements the experimental observations and provides insights into the interplay between inter-and intra-pore diffusive fluxes.
CHEMICAL ENGINEERING RESEARCH & DESIGN
(2023)
Article
Green & Sustainable Science & Technology
Evans Anto-Darkwah, Takeshi Kurotori, Ronny Pini, Avinoam Rabinovich
Summary: Characterizing subsurface reservoirs is crucial for environmental engineering technologies. This study presents a method to accurately model coreflooding experiments by estimating the permeability distribution and relative permeability of core samples, considering varying flow rates. The method improves previous approaches by achieving mm-scale accuracy. The application of the method to limestone core samples demonstrates its effectiveness in estimating saturation distribution and core pressure drop.
Article
Engineering, Environmental
Diana Iruretagoyena, Paul Fennell, Ronny Pini
Summary: This study investigated the adsorption of carbon dioxide on a commercial hydrotalcite (HT) and compared it with zeolite 13X (Z13X) using gravimetric analysis. The results showed that HT had higher adsorption capacities and surface area coverage at low pressures compared to Z13X. However, HT exhibited hysteresis and deactivation effects, indicating the need for further research on its regenerability. The CO2 adsorption isotherms of HT were successfully fitted to the Freundlich model.
CHEMICAL ENGINEERING JOURNAL ADVANCES
(2023)
Article
Engineering, Chemical
Adam Ward, Ke Li, Ronny Pini
Summary: We assessed dual-adsorbent beds for post-combustion CO2 capture using a model-based approach. We developed a process model and evaluated the performance of 2,850 combinations of adsorbents from a database of promising materials. We identified nine categories of process behavior and observed a reduction in energy penalty of the separation by approximately 20%.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)