Article
Chemistry, Applied
Kailu Zang, Junxia Ding, Wenna Zhang, Jindou Huang, Juanzhi Yan
Summary: This study extensively investigated the electronic structure of H-SSZ-13 and H-SAPO-34 zeolites and found that the catalytic activity of acidic zeolites is derived from the electronic distribution of their acidic catalytic centers. The acidity strength and polarization ability of the zeolites also affect their catalytic efficiency.
MICROPOROUS AND MESOPOROUS MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Yue Ma, Yang Gao, Xiaodong Wu, Baofang Jin, Rui Ran, Zhichun Si, Duan Weng
Summary: The influences of gaseous, weakly adsorbed, and strongly adsorbed NH3 on the low-temperature hydrothermal stability of SAPO-34 and Cu-SAPO-34 were investigated in this study. The results showed that gaseous NH3 and weakly adsorbed NH3 led to catalyst deactivation, while strongly adsorbed NH4+ helped protect the catalyst's activity.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Physical
Brenda Roberta Silveira De Araujo, Jon Ander Onrubia-Calvo, Guillaume Petaud, Antonio Nieto-Marquez, Benat Pereda-Ayo, Juan Ramon Gonzalez Velasco, Angel Caravaca, Sonia Gil
Summary: Cu-hierarchical SAPO-34-based catalysts are designed to enhance gas diffusion and improve NOx abatement efficiency at low temperature. However, the hydrothermal stability of mesopores may be compromised. The NH3-SCR catalytic activity of fresh and hydrothermally treated hierarchical catalysts was compared to a Cu-microporous catalyst, showing lower performance at high temperatures but higher activity at low temperatures due to increased active sites and enhanced diffusion through mesopores, as confirmed by the effectiveness factor.
Article
Thermodynamics
Y. M. Liu, Z. X. Yuan, X. Wen, C. X. Du
Summary: This study evaluated the performance of a solar adsorption cooling system using a silica gel-water working pair, finding optimal performance at an adsorption time of 45 minutes. Comparison with a SAPO-34 zeolite-water system showed that the silica gel system outperformed at the optimal adsorption time.
APPLIED THERMAL ENGINEERING
(2021)
Article
Chemistry, Multidisciplinary
Wei Zhang, Haipeng Zhang, Mengxi Ma, Shuzhen Wang, Jiangnan Xiang, Yan Wang, Weijiong Dai, Binbin Fan, Jiajun Zheng, Ruifeng Li
Summary: A series of Ga-modified ZSM-48 zeolites were synthesized by the dynamic hydrothermal method, with Ga species introduced into the molecular sieve framework. Ga modification reduced the acid amount and strength, especially for Bronsted acid. Pt-supported GaZSM-48 showed higher isomer selectivity and improved catalytic performance compared to the original ZSM-48, with Pt/GaZSM-48-1 providing the best iso-dodecane yield of 76%. Ga modification also reduced diffusion resistance and increased the turnover frequency of the catalyst.
REACTION CHEMISTRY & ENGINEERING
(2023)
Article
Engineering, Multidisciplinary
Tian Heyuan, Xi Wenchang, Zhang Yibo, Sun Liwei, Liu Peng, Wu Fan, Yang Guo, Guo Feng, Yang Xiangguang
Summary: This research provides a new method for preparing highly stable Cu-SAPO-34 catalysts by coating TiO2 nanolayers on the surface of Cu-SAPO-34 to improve its resistance to hydrothermal aging. The study has important implications for controlling NOx emissions from diesel engines.
SCIENCE CHINA-TECHNOLOGICAL SCIENCES
(2022)
Article
Chemistry, Applied
Jie Gong, Fei Tong, Chunyong Zhang, Mojtaba Sinaei Nobandegani, Liang Yu, Lixiong Zhang
Summary: In this study, a biosynthesis route for the preparation of hierarchical pompon-like SAPO-34 was developed using bacterial cellulose aerogel as template and silica source. The obtained hierarchical pompon-like SAPO-34 exhibited a spherical morphology with nanosheets and showed superior CO2 adsorption capacity compared to trigonal SAPO-34 crystals.
MICROPOROUS AND MESOPOROUS MATERIALS
(2022)
Article
Chemistry, Applied
D. Zapater, J. Lasobras, J. Soler, J. Herguido, M. Menendez
Summary: The conversion of methanol to light olefins was studied using SAPO-34 molecular sieve as the catalyst. The highest olefin yield was obtained at 500 degrees C with a 1:1 methanol:water molar ratio in the feed.
Article
Chemistry, Physical
Magdalena Jablonska
Summary: In recent years, Cu-exchanged small pore zeolites have been commercially used in diesel after-treatment systems. This article provides a review on the preparation, operating temperatures, poisoning and deactivation mechanisms, and NH3-SCR reaction mechanisms of Cu-SAPO-34, highlighting potential candidates for future development.
MOLECULAR CATALYSIS
(2022)
Article
Chemistry, Multidisciplinary
Shuchi Zhang, Dengyun Miao, Yi Ding, Mengyuan Li, Shujing Guo, Yujuan Zhang, Xiulian Pan, Xinhe Bao
Summary: The introduction of SAPO-34 into MnCrOx-ZSM-5 catalyst significantly enhances the formation of BTX without sacrificing the aromatics selectivity. SAPO-34 consumes partially the intermediates, inhibiting the methylation of BTX and leading to an enhanced BTX selectivity in the products. This hybrid catalyst provides an efficient method for highly selective synthesis of BTX from syngas.
SCIENCE CHINA-CHEMISTRY
(2023)
Article
Energy & Fuels
Wenjun Huang, Chenxi Zong, Zhisong Liu, Qinyuan Hong, Leipeng Ji, Haomiao Xu, Zan Qu, Naiqiang Yan
Summary: This paper investigates the removal of gaseous elemental mercury (Hg0) from industrial flue gas using Mn-based oxides modified SAPO-34 molecular sieve. The results show that deposition of 5% Mn on the surface of SAPO-34 enhances Hg0 removal efficiency, especially at lower temperatures. The surface MnOx particles enhance the oxidation of Hg0 and facilitate its adsorption.
Article
Biochemistry & Molecular Biology
Golnaz Navidi, Maryam Allahvirdinesbat, Seyed Mohammad Mousavi Al-Molki, Soodabeh Davaran, Parvaneh Nakhostin Panahi, Marziyeh Aghazadeh, Abolfazl Akbarzadeh, Aziz Eftekhari, Kazem Dindar Safa
Summary: The innovative therapeutic bio-composites were designed to enhance odontogenic and osteogenic differentiation of human dental pulp-derived mesenchymal stem cells. The scaffolds containing nanoparticles affected the physicochemical properties of the scaffolds differently, with CaSAPO-34/CS promoting cell differentiation and Fe-Ca-SAPO-34 promoting cell proliferation and osteogenic differentiation. The incorporation of FeO3 to the Ca-SAPO-34/CS scaffold led to increased proliferation and differentiation of the stem cells.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2021)
Review
Chemistry, Multidisciplinary
Wenhe Yu, Xiaowen Wu, Bohao Cheng, Tianyi Tao, Xin Min, Ruiyu Mi, Zhaohui Huang, Minghao Fang, Yangai Liu
Summary: SAPO-34 zeolite is known for its excellent form selection and controllability in the chemical industry, but easily generates carbon deposition leading to deactivation. To improve catalytic performance, reducing crystal size or introducing secondary macropores to form a hierarchical structure is essential.
CHEMISTRY-A EUROPEAN JOURNAL
(2022)
Article
Engineering, Chemical
Bin Wang, Nana Wang, Xuewen Li, Rongfei Zhou, Weihong Xing
Summary: High-aspect-ratio SAPO-34 nanosheets were successfully fabricated by exfoliation of lamellar SAPO-34 zeolite using a solvent-mediated freeze-thaw method. The nanosheets exhibited excellent performance in CO2 permeation and CO2/CH4 selectivity when used as thin membranes.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Engineering, Environmental
Jiayi Zhou, Nan Li, Xurui Wang, Lu Xu, Hao Zhou
Summary: Cu-SAPO-34 catalysts prepared by different methods showed excellent NOx removal ability in C3H6-SCR reaction, with the sample prepared by one-pot method exhibiting the best catalytic performance.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Chemistry, Applied
Juan I. Mirena, Denis Constales, Johan Martens, Jolien Dendooven, Gregory S. Yablonsky, Vladimir V. Galvita
Summary: The study reveals the complex dynamic behavior of CO oxidation over a Pt catalyst in heterogeneous catalysis. It shows that critical phenomena in such systems are influenced by surface interactions, nonlinear reaction mechanisms, and the transport of energy and mass. The pulse experiments conducted with a TAP reactor demonstrate the dependence of the dynamic patterns on the pulsed CO/O2 ratio and the local bed temperature, resulting in a dynamic transition between two critical values of the reaction rate for feed mixtures richer in O2 due to controlled interactions of adsorbed species on the catalyst's surface.
Article
Engineering, Environmental
Matthias Schoukens, Mohsen Gholami, Gino V. Baron, Tom Van Assche, Joeri F. M. Denayer
Summary: In this study, a fully electrified temperature vacuum swing adsorption (TVSA) method was investigated for adsorbent regeneration in post-combustion carbon capture. Different strategies of simultaneous and sequential heating and evacuation were applied, and the performance indicators included the adsorbate loading, bed pressure, bed temperature, and mole fraction of CO2 at the outlet. By using the inductive TVSA process, it took significantly less time to reach a 90% regeneration level compared to using only vacuum evacuation. Additionally, short heating and evacuation times were found to maintain a large portion of the total bed capacity as working capacity.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Green & Sustainable Science & Technology
Amirreza Aghili Mehrizi, Shahram Tangestaninejad, Joeri F. M. Denayer, Keikhosro Karimi, Marzieh Shafiei
Summary: Morpholinium ionic liquids with different anions were used for the pretreatment of triticale straw. The addition of water or DMSO as cosolvent improved the ethanol production efficiency. The best solvent for pretreatment was a mixture of N-allyl-N-methylmorpholinium and acetate, with 20% water as cosolvent.
Article
Chemistry, Multidisciplinary
Madhuwanthi Buddhadasa, Brieuc Verougstraete, Yamid Gomez-Rueda, David Petitjean, Joeri F. M. Denayer, Francois Reniers
Summary: Ammonia plasma treatment can enhance the CO2 adsorption capacity of activated carbon by improving its surface chemistry, although it may also result in a decrease in microporosity due to pore blocking by the treated species.
JOURNAL OF CO2 UTILIZATION
(2023)
Article
Engineering, Environmental
Hoseong Han, Joel M. P. Scofield, Paul A. Gurr, Paul A. Webley, Greg G. Qiao
Summary: Reducing CO2 emissions in the atmosphere is urgent due to serious environmental issues. Polymer-based ultrathin film composite (UTFC) membranes offer a promising solution with lower environmental impacts, higher cost-efficiency, and ease of scale-up. However, improving gas separation performance with a simplified fabrication process is still necessary for practical applications.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Green & Sustainable Science & Technology
Nasim Espah Borujeni, Masih Karimi Alavijeh, Joeri F. M. Denayer, Keikhosro Karimi
Summary: Ethanolic organosolv pretreatment was used to increase ethanol yield from apple pomace. The optimal condition was found to be 100 degrees C for 30 min, with 50% ethanol and without sulfuric acid, resulting in reduced greenhouse gas emissions during the fermentation process.
Review
Engineering, Chemical
Seyed Saeid Hosseini, Mohammad Azadi Tabar, Ivo F. J. Vankelecom, Joeri F. M. Denayer
Summary: Biogas is a reliable renewable resource and energy carrier with growing potential. The use of membranes for biogas valorization has attracted attention and advancements are being made in materials and processes. This review analyzes the extensive work done at different scales in relation to membrane separation processes for biogas. The discussions cover various membrane materials, processes, and configurations used in the entire value chain of biogas production, upgrading, and conversion. Guidelines for designing high-performance membrane systems are provided, taking into account economic considerations.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Rahul Maity, Mohsen Gholami, Sunil A. Peter, Matthias Schoukens, Segato Tiriana, Gino V. Baron, Joeri F. M. Denayer
Summary: A major challenge in Cyclic Swing Separation using flexible adsorbents is their very low-pressure hysteresis that hinders efficient desorption. Mg-Gallate MOF, a flexible adsorbent, shows very slow and inefficient desorption in pressure or temperature swing. Therefore, a novel strategy combining Magnetic Induction Heating with a vacuum swing is presented for fast and efficient CO2 desorption from flexible adsorbents at a moderately elevated temperature (70 degrees C).
Article
Biotechnology & Applied Microbiology
Mohsen Gholami, Tom R. O. Van Assche, Joeri F. M. Denayer
Summary: This review discusses the development of the adsorptive separation process and focuses on the hybrid temperature vacuum swing adsorption (TVSA) process. It highlights the current and potential applications of TVSA for carbon capture, as well as the cycle steps, heating methods, and bed configurations. The review clarifies the benefits and pitfalls of TVSA that are crucial for decision-making in technology development.
CURRENT OPINION IN CHEMICAL ENGINEERING
(2023)
Article
Engineering, Environmental
Jian Wang, Xu Chen, Tao Du, Liying Liu, Paul A. Webley, Gang Kevin Li
Summary: In this study, it was demonstrated experimentally that a VPSA rig filled with activated carbon RB3 can achieve hydrogen production with a purity of 99.67% and a recovery of 91.97% at a low feed pressure of 5.17 bar. By optimizing the parameters, a hydrogen product with a purity of 99.995% and a recovery of 92.29% was obtained at slightly increased adsorption pressure and vacuum pressure. The success of low-pressure hydrogen production from coke oven gas (COG) will greatly accelerate COG utilization transformation and the decarbonization of the iron and steel industry.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Sambhu Radhakrishnan, Charlotte Lejaegere, Karel Duerinckx, Wei-Shang Lo, Alysson F. F. Morais, Dirk Dom, C. Vinod Chandran, Ive Hermans, Johan A. A. Martens, Eric Breynaert
Summary: During the liquid phase adsorption of C-1-C-5 primary alcohols on high silica MFI zeolites, the concentration of adsorbed molecules exceeds the traditional adsorption sites. This additional adsorption is driven by hydrogen bonding between the alcohol function and the zeolite siloxane bridges, while chemi- and physi-sorption on traditional sites also occur simultaneously.
MATERIALS HORIZONS
(2023)
Article
Chemistry, Physical
Geert Watson, Nithin B. Kummamuru, Sammy W. Verbruggen, Patrice Perreault, Maarten Houlleberghs, Johan Martens, Eric Breynaert, Pascal van der Voort
Summary: This study explores the use of hydrophobic periodic organosilica nanoparticles for hydrogen storage as clathrate hydrates. The surface decoration with promoter agents enhances the formation and growth kinetics of clathrate hydrates, resulting in an increase in hydrogen storage capacity. These findings are of significant importance for the development of hydrogen clathrates in industrial applications.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Engineering, Environmental
Seyed Sajad Hashemi, Mehdi Abbasi-Riyakhuni, Joeri F. M. Denayer, Meisam Tabatabaei, Mortaza Aghbashlo, Keikhosro Karimi
Summary: This study addresses environmental issues related to dairy and ethanol plant wastewaters and generates valuable products through a novel three-phase fungi-based biorefinery. The biorefinery process optimizes cultivation conditions and maximizes mycoprotein production. The three-phase biorefinery significantly reduces chemical oxygen demand of the wastewater and produces promising amounts of mycoprotein and biomethane.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2023)
Article
Engineering, Chemical
Tom R. C. Van Assche, Gille R. Wittevrongel, Valentina Lozano Betancur, Lala Muslumzada, Joeri F. M. Denayer
Summary: This paper proposes a graphical method to obtain adsorbed amounts from breakthrough curves, which can be used in isothermal, diluted adsorption breakthrough experiments. By using an integrated capacity curve, additional equilibrium points can be extracted beyond the final state without the need for a multicomponent model.
CHEMICAL ENGINEERING SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Ravi Sharma, Ghadi Saab, Matthias Schoukens, Tom R. C. Van Assche, Joeri F. M. Denayer
Summary: This study presents a novel hybrid ferromagnetic MOF-alginate composite bead for atmospheric water harvesting. The composite exhibits high water capture capacity and quick water release capability, making it an attractive candidate for next-generation water harvesting devices. It also shows high stability in outdoor conditions, indicating its potential for practical applications.
APPLIED MATERIALS TODAY
(2023)
