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
Energy & Fuels
Ayub Golmakani, Seyed Ali Nabavi, Basil Wadi, Vasilije Manovic
Summary: The use of biogas as a renewable energy resource has the potential to significantly reduce greenhouse gas emissions, however its share in the global renewable energy market does not reflect this potential. This study reviews advancements in biogas cleaning and upgrading technologies, addresses converting biogas to biomethane, and discusses the application of biogas in various technologies.
Article
Engineering, Environmental
Jung Gi Min, K. Christian Kemp, Kevin S. Kencana, Rino R. Mukti, Suk Bong Hong
Summary: The 973 K-steamed cesium ZK-5 zeolite shows high propylene uptake and propylene/propane selectivity, along with fast adsorption kinetics, making it potentially useful for selective propylene/propane separation. Its impressive regeneration performance compares favorably with pure-silica small-pore zeolite ITQ-12, highlighting its potential in adsorption processes.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Engineering, Environmental
Haiyan Yang, Xinzhong Wang, Jun Liu, Wanzhen Liu, Yue Gong, Yankun Sun
Summary: The study found that with a TEPA loading of 40wt% and a flow rate of 200mL.min(-1), the CO2 adsorption capacity reached optimal value. ADS-17-40%TEPA exhibited good reversibility, with the CO2 adsorption capacity remaining nearly stable after two adsorption-desorption cycles.
CHEMICAL ENGINEERING JOURNAL
(2022)
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
Engineering, Chemical
Haifei Jiang, Zheyuan Guo, Hongjian Wang, Xin Liu, Yanxiong Ren, Tong Huang, Jiandang Xue, Hong Wu, Junfeng Zhang, Yan Yin, Zhongyi Jiang, Michael D. Guiver
Summary: COF-based composite membranes offer breakthroughs in separation performance, but challenges such as poor filler dispersity and limited functionality severely restrict their development. Therefore, the careful design of physical and chemical structures for COFs is urgently needed. A geometry transformation strategy can overcome some challenges, by decreasing filler size, improving dispersibility and compatibility, and introducing chemical functionality at the quantum dot edges.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Engineering, Environmental
Chun-Yu Lai, Linjie Zhou, Zhiguo Yuan, Jianhua Guo
Summary: Biogas upgrading is an advanced process that aims to convert biogas into biomethane with higher commercial value by removing carbon dioxide. Utilizing microbial technologies and hydrogen as electron donor can effectively upgrade biogas quality by removing CO2 and increasing its value.
Article
Energy & Fuels
Sangseo Gu, Jae-Wook Choi, Dong Jin Suh, Young-Kwon Park, Jungkyu Choi, Jeong-Myeong Ha
Summary: Biogas is a promising energy source and chemical feedstock, but its application as fuel is limited due to its low calorific value. Upgrading biogas via the oxidative coupling of methane can increase its heating value to meet fuel standards, however, sulfur compounds produced during this process can negatively impact catalysts.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Engineering, Environmental
Liang Feng, Feihong Liang, Lang Xu, Long Ji, Qingyao He, Shuiping Yan
Summary: A novel system has been established for simultaneous biogas upgrading, CO2 sequestration, and biogas slurry decrement by using biomass ash as an absorbent, achieving high absorption capacity and low upgrading cost.
Review
Agricultural Engineering
Tian Yuan, Zhenya Zhang, Zhongfang Lei, Kazuya Shimizu, Duu-Jong Lee
Summary: Biogas upgrading is essential for efficient utilization of biogas from organic wastes. Biogas recirculation in AD reactors can enhance methane content and establish a robust system for waste treatment. More research is needed for better understanding of mechanisms and optimization of the AD system for high-calorie bioenergy production.
BIORESOURCE TECHNOLOGY
(2022)
Article
Engineering, Environmental
Thiwa Rattanaya, Ajchareeya Manmeen, Prawit Kongjan, Charun Bunyakan, Alissara Reungsang, Kulchanat Prasertsit, Lidia Lombardi, Rattana Jariyaboon
Summary: The study demonstrates that NaOH used in biogas upgrading can achieve high removal efficiencies of CO2 and H2S through regeneration, and untreated groundwater can be used to prepare the absorbent with similar efficiency as softened water. Experimental and simulation results show that a smaller volume caustic scrubber can replace a bio scrubber to improve biomethane production efficiency.
JOURNAL OF WATER PROCESS ENGINEERING
(2021)
Article
Chemistry, Multidisciplinary
Francesc Vines, Adria Calzada, Pablo Gamallo
Summary: Different nano-engineered grazynes were studied as membranes for separating methane and carbon dioxide. The study investigated the thermodynamics, kinetics, and dynamics of the process and compared the materials to others in the literature. The results showed that grazynes have low adsorption energy and diffusion energy barriers, making them excellent membranes for biogas upgrading with improved selectivity and larger quantity of separated CO2 per material gram.
JOURNAL OF CO2 UTILIZATION
(2023)
Review
Engineering, Environmental
Seyed Saeid Hosseini, Joeri F. M. Denayer
Summary: Biogas is gaining more attention as a sustainable energy carrier, and adsorption processes play a crucial role in its widespread utilization and economic viability. Mathematical modeling and simulation methods have advanced to support the growth of biogas upgrading, while computational methods have become more capable in handling complex phenomena. This review focuses on the implementation of mathematical modeling, simulation, and optimization methods for biogas upgrading, specifically adsorption based processes. Various strategies and methodologies for developing mathematical models and process simulations are discussed, along with the applications of molecular computational methods and hybridization/intensification strategies. The techno-economic assessment of these processes is also presented, providing insights and recommendations for future activities.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Environmental Sciences
Khuram Maqsood, Asif Jamil, Anas Ahmed, Burhannudin Sutisna, Suzana Nunes, Mathias Ulbricht
Summary: Biogas is a clean and sustainable energy source that is widely available worldwide. In order to fully utilize the benefits of this cleaner resource, it is essential to remove other gases and enrich the methane content. This study explores the use of blend membranes composed of polyetherimide (PEI) and polyvinyl acetate (PVAc) to enhance the performance of methane enrichment. The results show that PVAc is an excellent option for expanding the separation performance of blended polymeric membranes for biogas enrichment.
Article
Chemistry, Applied
Priscilla Ogunlude, Ofasa Abunumah, Ifeyinwa Orakwe, Habiba Shehu, Firdaus Muhammad-Sukki, Edward Gobina
Summary: Biogas has the potential to be a renewable energy source that is adaptable and can reduce greenhouse gas emissions. This study focuses on upgrading biogas using membrane technology and analyzes factors that affect permeability and selectivity. It is found that pore size plays a vital role in the optimization of the membrane process.
Article
Engineering, Chemical
Maarten Houlleberghs, Loes Verheyden, Filip Voorspoels, C. Vinod Chandran, Karel Duerinckx, Sambhu Radhakrishnan, Johan A. Martens, Eric Breynaert
Summary: Magnetohydrodynamic mixing was evaluated as an alternative method to conventional high shear mixing for preparing carbomer hydrogels. Results showed that magnetohydrodynamic mixing can adjust the viscosity of the hydrogel and achieve higher concentrations of TEA.
Article
Engineering, Chemical
Feng Xiong, Chen Ji, Shengzhi Gan, Peng Liang, Yi Huang, Jin Shang, Baoyu Liu, Jinxiang Dong
Summary: Mesoscopically structured ZSM-5 nanosheets were prepared as highly active catalysts for the alkylation between toluene with methanol. The Bronsted acid sites of ZSM-5 nanosheets were mainly distributed on the external surface in aluminum-rich zeolites, and high alkalinity was required for silica-rich systems to dissolve silica species in order to finish the self-assemble process, leading to ZSM-5 nanosheets with high alkalinity presenting enhanced catalytic performance. Moreover, the optimized ZSM-5-50-2.5 showed good effectiveness and stability in the alkylation reaction between toluene and methanol.
Article
Chemistry, Analytical
Hannah Vanderschaeghe, Maarten Houlleberghs, Loes Verheyden, Dirk Dom, C. Vinod Chandran, Sambhu Radhakrishnan, Johan A. Martens, Eric Breynaert
Summary: Porous silica is commonly used to enhance the bioavailability of poorly soluble compounds in drug delivery. Traditional methods for residual solvent quantification in drug formations are tedious and involve extraction and capillary gas chromatography. This study presents a new method using magic-angle spinning nuclear magnetic resonance spectroscopy, originally developed for water quantification in zeolites. The results show that the initial water content of the silica carrier can impact the residual solvent concentration in drug-loaded materials.
ANALYTICAL CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Yuanmeng Tian, Hao Wu, Aamir Hanif, Yanli Niu, Ying Yin, Yangyi Gu, Zuofeng Chen, Qinfen Gu, Yun Hau Ng, Jin Shang, Liangchun Li, Mingxian Liu
Summary: In this study, a high nitrogen-containing ligand was designed and used to prepare three new MOFs, which were further converted into nitrogen-doped carbon catalysts with hierarchical porous structure. The obtained catalyst showed excellent oxygen evolution reaction (OER) activity due to its well-defined periodic structure and active components. This work provides a new strategy for the fabrication of nitrogen-doped carbon/metal electrocatalysts from cost-effective and abundant biomolecules, showing great potential for practical OER application.
CHINESE CHEMICAL LETTERS
(2023)
Article
Engineering, Environmental
Yuanmeng Tian, Ming Kong, Zeyu Tao, Chen Yang, Shanshan Shang, Qinfen Gu, Daniel C. W. Tsang, Liangchun Li, Jin Shang
Summary: A microporous covalent triazine framework (CTF) was developed as an effective adsorbent for NO2 capture, achieving high cyclable capacity and moderate adsorption affinity. The pristine CTF exhibited a high NO2 adsorption capacity, which was further enhanced by surface nitrogen conversion. This work not only provides promising adsorbents for mitigating NO2 pollution, but also a strategy for developing robust adsorbents for corrosive and toxic gases.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Agricultural Engineering
Safoura Vaez, Keikhosro Karimi, Joeri F. M. Denayer, Rajeev Kumar
Summary: Waste apple pomace can be used to produce pectin and biofuels through sulfuric acid treatment. Optimal conditions were determined to maximize the yields of pectin and biofuels. The process has the potential to produce a large amount of bioethanol and reduce greenhouse gas emissions.
BIOMASS & BIOENERGY
(2023)
Review
Food Science & Technology
Shahida Anusha Siddiqui, Anjelina Sundarsingh, Nur Alim Bahmid, Nilesh Nirmal, Joeri F. M. Denayer, Keikhosro Karimi
Summary: This study critically evaluated the quality of biodegradable materials for meat packaging and the need for research in their improvement. Cellulose, polyhydroxyalkanoates, and polylactic acid showed potential for meat preservation, but their mechanical properties and gas and moisture exchange control need improvement. The use of these renewable materials in meat products is still limited.
COMPREHENSIVE REVIEWS IN FOOD SCIENCE AND FOOD SAFETY
(2023)
Article
Thermodynamics
Razieh Shafiei Alavijeh, Amin Shahvandi, Oseweuba Valentine Okoro, Joeri F. M. Denayer, Keikhosro Karimi
Summary: The present study investigated an integrated biorefinery that utilized corn stover as a feedstock for sustainable production of bioethanol, biodiesel, biogas, chitosan, glycerol, and animal feed. The study found that dilute acid pretreatment and enzymatic hydrolysis effectively released glucose and xylose, which were then converted into bioethanol, glycerol, and fungal biomass by a specific fungus. Additionally, the residue was converted into biogas, and the resulting products exhibited potential for carbon dioxide reduction and cost savings.
ENERGY CONVERSION AND MANAGEMENT
(2023)
Article
Chemistry, Physical
Hannelore Geerts-Claes, Sam Smet, Christoph Hengst, Frank-Walter Schuetze, Elke Verheyen, Matthias Minjauw, Christophe Detavernier, Sreeprasanth Pulinthanathu Sree, Johan Martens
Summary: This study investigates the mechanism of NOx adsorption on a Pd/FER zeolite in gas mixtures containing CO, O2, and H2O. It is found that oxidized palladium is required for achieving NOx adsorption, while clustered zerovalent palladium reduced with H2 cannot adsorb NOx in the presence of O2. The study provides evidence for a reaction mechanism involving oxygen-bridged PdII-O-PdII moieties of PdO nanoclusters, and the NO adsorption site on palladium is obtained by reducing one of the two PdII atoms to the zerovalent state, which is more readily achieved with CO compared to NO, explaining the beneficial role of CO.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Multidisciplinary
Ravi Sharma, Zhuoheng Zhou, Thomas Themelis, Tom R. C. Van Assche, Sebastiaan Eeltink, Joeri F. M. Denayer
Summary: In this study, the low trace-level removal of perfluorooctanesulfonic acid (PFOS) from aqueous solutions using zeolitic imidazolate framework-8 (ZIF-8)-coated copper sheet (ZIF-8@Cu) composite is reported for the first time. The composite showed the highest removal rate of 98% and remained consistent over a wide range of concentrations. The morphological and structural characterization revealed surface degradation of ZIF-8 crystals, but despite this, ZIF-8 effectively removes PFOS molecules from aqueous solutions.
Article
Chemistry, Applied
Anouk L'Hermitte, Hassan Azzan, Marcus H. N. Yio, Ashwin Kumar Rajagopalan, David Danaci, Takuya Hirosawa, Toshihiro Isobe, Camille Petit
Summary: Porous boron nitride (BN) with high surface area and porosity has been explored for various gas and liquid separation applications, however, it displays hydrolytic instability. In this study, a method to enhance the hydrolytic stability of porous BN via surface functionalization using fluoroalkylsilane is proposed. Two different routes of functionalization were explored, and both produced materials with enhanced moisture stability. However, route 2, which involved coating porous BN pellets with fluoroalkylsilane, resulted in better resistance to moisture exposure compared to route 1, which involved functionalization of porous BN powder followed by pelletization. The functionalized samples also maintained reasonable CO2 uptakes despite reduced porosity.
MICROPOROUS AND MESOPOROUS MATERIALS
(2023)
Article
Engineering, Chemical
Mingzhe Sun, Aamir Hanif, Tianqi Wang, Qinfen Gu, Jin Shang
Summary: Nitrogen dioxide (NO2) is a potent atmospheric pollutant generated from fossil fuel combustion, and its efficient removal at ambient temperatures is important. Copper-based metal-organic framework (MOF)-derived carbon materials (Cu@C(CuBTC) and Cu@C(CuBDC)) show high NO2 capacity with minimal release of NO, and exhibit outstanding reusability under humid conditions, making them promising for real-world applications. This study provides a general and facile strategy for designing efficient adsorbents for the removal of various toxic gases at ambient temperature.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Hannelore Geerts-Claes, Gina Vanbutsele, Sreeprasanth Pulinthanathu Sree, Sambhu Radhakrishnan, C. Vinod Chandran, Eric Breynaert, Johan A. Martens, Sam Smet
Summary: RHO zeolites with different Si/Al ratios and particle morphologies were successfully synthesized by adding crown ether and adjusting the sodium content. The zeolites showed exceptional stability even at low Si/Al ratios, which can be attributed to the double eight-ring framework.
CRYSTAL GROWTH & DESIGN
(2023)
Article
Engineering, Chemical
Shanshan Shang, Chao Yang, Yuanmeng Tian, Zeyu Tao, Mallory Smith, Hongyan Zhang, Lin Zhang, Liangchun Li, Qinfen Gu, Hong-Cai Zhou, Yong Sik Ok, Jin Shang
Summary: Selective adsorption using porous materials is a promising approach to removing ambient nitrogen dioxide (NO2). In this study, multivariate porphyrin-based metal-organic frameworks (MTV-PMOFs Al-PMOF(NixCoy)) with atomically dispersed Ni/Co dual-metal centers were designed as adsorbents capable of synergistically boosting NO2 adsorption capability and retaining the evolved NO. This work provides new perspectives for the development of adsorption-based technology for mitigating ambient NO2 pollution and managing other corrosive and toxic gases.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Review
Energy & Fuels
Paola Saenz A. Cavazos, Elwin Hunter-Sellars, Paul Iacomi, Sean R. McIntyre, David Danaci, Daryl R. Williams
Summary: Expanding populations and growing economies lead to higher energy demands, which require a diverse energy mix and deployment of carbon capture and removal technologies to reduce carbon emissions. However, the lack of materials-related information and the inconsistency in measurement parameters and data presentation pose challenges to the scale-up of these technologies, especially in the case of solid adsorption-based carbon capture. This review examines the characterization of solid sorbents for carbon capture, focusing on performance parameters and experimental conditions, and emphasizes the importance of experimental data.
FRONTIERS IN ENERGY RESEARCH
(2023)