Article
Chemistry, Multidisciplinary
Hyun June Choi, Donghui Jo, Jung Gi Min, Suk Bong Hong
Summary: The CO2 adsorption behavior of various alkali cation-exchanged forms of merlinoite zeolites with Si/Al=2.3 and 3.8 at 25-75 degrees C and 0-1.0 bar is studied. It is found that different forms of extraframework cations in MER zeolites exhibit different CO2 adsorption characteristics, indicating a cooperative cation gating-breathing mechanism.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Multidisciplinary
Hyun June Choi, Elliott L. Bruce, Kevin S. Kencana, Jingeon Hong, Paul A. Wright, Suk Bong Hong
Summary: This study found that the isotherms of CO2 adsorption on cesium-exchanged phillipsite zeolite exhibit a rectilinear step shape. Structural analysis revealed that this behavior is caused by the high concentration and large size of cesium ions in the dehydrated zeolite, which allows the relaxation of the framework and enables the filling of pores with CO2 over a narrow range of pressure. This highly cooperative phenomenon has not been observed in other zeolites.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Eduardo Perez-Botella, Miguel Palomino, Gabriel B. Bafero, Heloise O. Pastore, Susana Valencia, Fernando Rey
Summary: The influence of framework topology on the separation of carbon dioxide from methane was studied in small pore pure silica zeolites with various structures. Pure silica materials were used to isolate the effect of framework topology. The results showed that materials with channel-like topology exhibited higher selectivity towards CO2 due to kinetic exclusion of methane. Si-ITW showed promising performance in CO2 separation, with high selectivity, diffusion rates, and moderate maximum capacity. It also had advantages over traditional zeolites in terms of energy requirements for regeneration and hydrophobicity.
JOURNAL OF CO2 UTILIZATION
(2023)
Article
Chemistry, Inorganic & Nuclear
Xiang-Jing Gao, He-Gen Zheng
Summary: Research on the relationship between structure and CO2 adsorption capacity of MOFs was conducted, exploring the impact of functional groups on MOFs. Experimental results showed that compounds with a pyridazinyl group exhibited higher CO2 adsorption capacity.
DALTON TRANSACTIONS
(2021)
Article
Chemistry, Multidisciplinary
Xiao-Hong Xiong, Zhang-Wen Wei, Wei Wang, Liu-Li Meng, Cheng-Yong Su
Summary: In this study, a viable synthetic protocol was developed to produce DUT-67 with controllable MOF structure, excellent crystallinity, adjustable shape/size, and large-scale production. Simple HCl post-treatment resulted in depurated DUT-67-HCl with ultrahigh purity, excellent chemical stability, fully reversible SO2 uptake, and high separation selectivity. This research has important implications for future SO2 capture and recovery technology.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Applied
Maxime Debost, Edwin B. Clatworthy, Julien Grand, Nicolas Barrier, Nikolai Nesterenko, Jean-Pierre Gilson, Philippe Boullay, Svetlana Mintova
Summary: There is a growing demand for porous materials with the ability to separate natural gas components, mainly CH4 and CO2. Zeolites with flexible small pores are interesting due to their high sorption capacity and selective separation ability. By introducing different extra-framework cations, such as Na+, K+, Cs+, the pore size, cavity size, and shape of the zeolite can be controlled, allowing for selective access to the pores and cages. The synthesis of nanosized CHA zeolites with optimized quantities of extra-framework cations and hydrothermal conditions was successfully achieved, resulting in a high CO2 storage capacity and making it an ideal candidate for gas separation applications.
MICROPOROUS AND MESOPOROUS MATERIALS
(2023)
Review
Chemistry, Multidisciplinary
Ru-Shuai Liu, Xiao-Dong Shi, Cheng-Tong Wang, Yu-Zhou Gao, Shuang Xu, Guang-Ping Hao, Shaoyun Chen, An-Hui Lu
Summary: With the atmospheric CO2 concentration rapidly increasing to record levels, there is a growing need for advanced CO2 capture technologies. Physical adsorption-based separation technologies offer easy regeneration, high cycle stability, and potentially lower energy penalties and costs. Extensive research has been conducted ranging from novel porous adsorbents to practical separation practices, with a focus on intrinsic properties and industrial relevant variables to enhance CO2 capture.
Review
Chemistry, Physical
Dina G. Boer, Jort Langerak, Paolo P. Pescarmona
Summary: This article reviews the properties of zeolites as CO2 adsorbents and critically presents and discusses their advantages and limitations. Firstly, an overview of the CO2 adsorption mechanisms on different types of zeolites is provided. Then, the relationship between the physicochemical properties of zeolites (framework type, Si/Al ratio, and extra-framework cations) and their performance as CO2 adsorbents for the separation of CO2/CH4 (biogas) and CO2/N2 (flue gas) mixtures is systematically discussed. Based on the identified trends and properties, a comparison of different zeolites is made, highlighting their advantages and drawbacks for CO2 adsorption. Finally, the state of the art in the shaping of zeolites in macroscopic format, which is crucial for their industrial utilization as adsorbents, is presented.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Valeria B. Lopez-Cervantes, Dae Won Kim, Juan L. Obeso, Eva Martinez-Ahumada, Yoarhy A. Amador-Sanchez, Eli Sanchez-Gonzalez, Carolina Leyva, Chang Seop Hong, Ilich A. Ibarra, Diego Solis-Ibarra
Summary: The MOF-type Ni-2(dobpdc) exhibits high chemical stability towards SO2, high capacity for low-pressure SO2 capture, and exceptional cycling performance. Fluorescence experiments demonstrate the remarkable SO2 detection selectivity of Ni-2(dobpdc). Time-resolved photoluminescence experiments provide a plausible mechanism of SO2 detection by this Ni(ii)-based MOF material.
Article
Energy & Fuels
Houxiao Wu, Yinuo Yuan, Yongwei Chen, Daofei Lv, Shi Tu, Ying Wu, Zhong Li, Qibin Xia
Summary: MOF-11, a copper-based metal-organic framework, shows efficient CO2/N-2 separation performance due to dense Cu open metal sites and -CH2 moieties from organic ligands. Its high CO2 uptake and selectivity are attributed to the strong electrostatic interactions with Cu OMS in channel I and weak van der Waals interactions with -CH2 moieties in channel II. The dynamic separation of CO2/N-2 mixture gases on MOF-11 was further investigated through cyclic breakthrough experiments.
Article
Environmental Sciences
Ziyi Shen, Jie Jin, Jingjing Fu, Meng Yang, Feihu Li
Summary: The co-occurrence of arsenic and fluoride in water can lead to health concerns. Magnetic biochars with aluminum and magnesium oxides show enhanced adsorption capacity for both AsV and F-.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Article
Chemistry, Multidisciplinary
Sang Rim Shin, Hae Sung Cho, Yongjin Lee, Suji Gim, Yong Min Jung, Hyungjun Kim, Osamu Terasaki, Jeung Ku Kang
Summary: This study investigates the adsorbate behavior in individual local pores of MIL-101, a metal-organic framework with heterogeneous mesopores and different metal sites. The interaction between substrate and adsorbate affects the initial adsorption and pore condensation steps, with changes in monolayer adsorption gradient depending on the metal-adsorbate attraction force. The study also reveals the influence of different metals on adsorption isotherms, as well as capillary condensation leading to local negative uptake behavior in individual pore isotherms.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Chemistry, Multidisciplinary
Hanqian Pan, Xian Suo, Zhenglu Yang, Lifeng Yang, Xili Cui, Huabin Xing
Summary: A new class of ionic porous polymers with high ionic density and microporous surface area is constructed through a facile copolymerization strategy, providing an efficient path to rational control over pore structure and functionality. These polymers demonstrate the highest C2H2/CO2 selectivity among porous organic polymers, effectively addressing the challenge of discriminating structurally similar gases. Modeling studies reveal the role of anions in preferential C2H2 capture due to specific Br···HC(sic)CH interactions.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Engineering, Environmental
Yixuan Yu, Xianhai Li, Xiubo Min, Mingyang Shang, Ping Tao, Tianjun Sun
Summary: This study focuses on the effects of channel morphology and Bronsted acidity on noble gas separation using three different zeolites. ZSM-5 has been found to have better selectivity for separating Xe and Kr, making it an efficient method for capturing Xe from used radioactive gas and cryogenic air.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Nanoscience & Nanotechnology
Aline Lauwers, Jannick Vercammen, Dirk De Vos
Summary: This study identifies all-silica zeolite beta as an ideal sorbent for the removal of PFAS, with the length of the PFAS chain affecting its affinity and capacity. The solution pH, the presence of cations or natural organic substances have minimal influence on the adsorption efficiency. Additionally, the PFOS-loaded zeolite can be regenerated through thermal or solvent-driven methods.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Dali Zhu, Linying Wang, Dong Fan, Nana Yan, Shengjun Huang, Shutao Xu, Peng Guo, Miao Yang, Jianming Zhang, Peng Tian, Zhongmin Liu
ADVANCED MATERIALS
(2020)
Article
Chemistry, Applied
Dong Fan, Yuyan Qiao, Kaipeng Cao, Lijing Sun, Shutao Xu, Peng Tian, Zhongmin Liu
MICROPOROUS AND MESOPOROUS MATERIALS
(2020)
Article
Chemistry, Multidisciplinary
Nana Yan, Chao Ma, Yi Cao, Xiaona Liu, Lei Cao, Peng Guo, Peng Tian, Zhongmin Liu
Article
Chemistry, Applied
Lijing Sun, Miao Yang, Lei Cao, Yi Cao, Shutao Xu, Dali Zhu, Peng Tian, Zhongmin Liu
MICROPOROUS AND MESOPOROUS MATERIALS
(2020)
Article
Chemistry, Applied
Lijing Sun, Wenna Zhang, Zhuocheng Li, Miao Yang, Ye Wang, Xiaosi Zhang, Peng Tian, Zhongmin Liu
Summary: Two SAPO molecular sieves with -CLO and MEI topologies, named as SAPO-CLO and ECR-40F, were synthesized in an aminothermal environment using N,N-diethyl ethanolamine (DEEA) as both a solvent and an organic structure-directing agent (OSDA), and N,N,N-trimethylbutylammonium chloride (BTMACl) as a co-OSDA. The introduction of Si atoms into the aluminophosphate framework of DNL-1 has been evidenced by Si-29 MAS NMR. The crystallization efficiency and solid yield of ECR-40F is dramatically improved compared with the previously reported synthesis of ECR-40, thanks to the strong alkaline aminothermal environment combining with the dual OSDAs and fluoride mineralizing agent.
MICROPOROUS AND MESOPOROUS MATERIALS
(2021)
Editorial Material
Engineering, Multidisciplinary
Mao Ye, Peng Tian, Zhongmin Liu
Article
Chemistry, Inorganic & Nuclear
Xiaona Liu, Nana Yan, Chao Ma, Lei Wang, Peng Tian, Peng Guo, Zhongmin Liu
Summary: The study revealed the preferred positions of boron atoms and the importance of structural-directing agents in the synthesis of MFI-type borosilicates, providing a new approach to controlling the locations of Brønsted acids.
INORGANIC CHEMISTRY COMMUNICATIONS
(2021)
Article
Chemistry, Multidisciplinary
Xiaona Liu, Lingmei Liu, Tingting Pan, Nana Yan, Xinglong Dong, Yuanhao Li, Lu Chen, Peng Tian, Yu Han, Peng Guo, Zhongmin Liu
Summary: The study successfully solved the atomic structure of polymorphs A and B of zeolite EMM-17, obtained the first atomic-resolution images of EMM-17, and discovered numerous local structural defects. The unique porous structure of EMM-17 allows for efficient kinetic separation of C-6 alkane isomers.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Review
Chemistry, Multidisciplinary
Zhang Xiaosi, Yang Miao, Tian Peng, Liu Zhongmin
Summary: AlPO and SAPO molecular sieves are important materials with wide applications. However, the research on their synthesis is still insufficient and requires further development.
CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
(2022)
Article
Chemistry, Applied
Dongxia Luo, Quanyi Wang, Dong Fan, Miao Yang, Benhan Fan, Kaipeng Cao, Shutao Xu, Peng Tian, Zhongmin Liu
Summary: The size of inorganic cations plays a crucial role in the synthesis of siliceous Beta, with smaller cations facilitating the synthesis and larger ones potentially leading to impurity or amorphous materials. Inorganic cations help promote the fast polymerization of SiO2 colloids, aiding in the high-yield synthesis of siliceous Beta. The resultant material has few defects, high hydrophobicity, and large adsorption capacity for toluene compared to fluoride-synthesized siliceous Beta.
MICROPOROUS AND MESOPOROUS MATERIALS
(2022)
Article
Chemistry, Physical
Kaipeng Cao, Dong Fan, Mingbin Gao, Benhan Fan, Nan Chen, Linying Wang, Peng Tian, Zhongmin Liu
Summary: The presence of surface barriers in zeolites plays a crucial role in governing their catalytic performance, affecting both activity and stability of the catalyst. Chemical etching of the outer layer of zeolite crystals has been proven to be an effective strategy to reduce surface barriers, enhance mass transport properties, and improve the activity and stability of the catalyst. This work highlights the importance of controlling synthetic strategy and surface barriers on zeolite crystals for designing highly efficient catalysts.
Article
Chemistry, Physical
Linying Wang, Dali Zhu, Juan Wang, Wenhao Cui, Jingfeng Han, Bing Li, Dong Fan, Peng Tian, Zhongmin Liu
Summary: The embryonic CHA zeolite used for SSZ-13 synthesis offers fast crystallization, diverse product SiO2/Al2O3 ratio, and high yield, indicating its potential for enhancing zeolite synthesis efficiency and performance.
JOURNAL OF MATERIALS CHEMISTRY A
(2021)
Article
Chemistry, Applied
Kaipeng Cao, Dong Fan, Shu Zeng, Benhan Fan, Nan Chen, Mingbin Gao, Dali Zhu, Linying Wang, Peng Tian, Zhongmin Liu
Summary: A seed-assisted low alkalinity gel system was developed for the organic-free synthesis of MOR zeolite, resulting in nanoassemblies with high Si/Al ratio and solid yield. The acid strength of the samples increased with Si/Al ratio, and sample I-9.4 displayed the best mass transfer performance and acidity accessibility. In the DME carbonylation reaction, sample I-9.4 exhibited the highest activity and selectivity for methyl acetate.
CHINESE JOURNAL OF CATALYSIS
(2021)
Article
Chemistry, Multidisciplinary
Juan Wang, Linying Wang, Dali Zhu, Wenhao Cui, Peng Tian, Zhongmin Liu
Summary: Na+-free Cu-SSZ-13 zeolites were successfully synthesized using a cooperative strategy, showing advantages of rapid crystallization and high yield. The calcined materials exhibited good NH3-SCR catalytic performance and hydrothermal stability.
CHEMICAL COMMUNICATIONS
(2021)
Article
Chemistry, Physical
Yi Cao, Dong Fan, Dali Zhu, Lijing Sun, Lei Cao, Peng Tian, Zhongmin Liu
JOURNAL OF CATALYSIS
(2020)
