Article
Chemistry, Physical
Lucas Mendes Vieira, Dyovani Bruno Lima Santos, Carla Eponina Hori
Summary: In this study, the sorption-enhanced steam reforming of ethanol process was investigated using modified catalysts. The results showed that the catalyst containing mayenite exhibited the best CO2 capture capacity and stability.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Engineering, Chemical
Chengxiong Dang, Jinlu Luo, Wenwen Yang, Hanke Li, Weiquan Cai
Summary: The study demonstrates the effective catalysis of dry reforming of methane at 600 degrees C by Pd-promoted Ni-CaO-Ca12Al14O33 multifunctional adsorbent/catalyst materials with high CO2 and CH4 conversion rates. The presence of Pd enhances CH4 dissociation activity and allows for reversible encapsulation and release of Ni particles to prevent sintering. The catalyst also shows long-term stability due to easy removal of active carbon species by CO2 and CaCO3.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2021)
Article
Green & Sustainable Science & Technology
Chengxiong Dang, Huanhuan Xia, Shuting Yuan, Xingchuan Wei, Weiquan Cai
Summary: Sorption-enhanced steam reforming of biogas (SESRB) is an efficient method to obtain high-purity hydrogen from biogas with in-situ CO2 removal. The study shows that the CO2 content does not affect CH4 conversion and H2 purity in the pre-breakthrough stage of SESRB process. The results demonstrate that SESRB is a promising technology for the efficient utilization of biogas to produce high-purity hydrogen.
Article
Thermodynamics
Florian Pruvost, Schalk Cloete, Carlos Arnaiz del Pozo, Abdelghafour Zaabout
Summary: This study evaluates the techno-economic aspects of blue hydrogen production using steam methane reforming (SMR). The findings suggest that pre-combustion CO2 capture is a cost-effective method to reduce CO2 emissions, while post-combustion CO2 capture can be a better solution for the final 20% of emissions. Additionally, an advanced heat integration scheme and hybrid production options show potential for cost reduction.
ENERGY CONVERSION AND MANAGEMENT
(2022)
Article
Chemistry, Physical
Chien-Hung Chen, Ching-Tsung Yu, Wen-Hui Chen
Summary: Optimization of steam methane reforming reaction through CO2 sorption enhancement resulted in high-purity hydrogen production suitable for proton-exchange membrane fuel cells, demonstrating significant differences in CH4 conversion between SMR and SESMR.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Multidisciplinary
Dyovani Bruno Lima Santos, Ana Caroline Pereira Oliveira, Carla Eponina Hori
Summary: The study investigated the effect of adding sodium to a CaO sorbent in SE-SMR process. It was found that while sodium addition decreased the duration of pre-breakthrough, it also increased sintering effect. XRD, SEM, and TGA results showed an inverse relationship between particle diameter and CO2 capture performance.
JOURNAL OF CO2 UTILIZATION
(2021)
Article
Engineering, Environmental
Maria Cortazar, Shuzhuang Sun, Chunfei Wu, Laura Santamaria, Leire Olazar, Enara Fernandez, Maite Artetxe, Gartzen Lopez, Martin Olazar
Summary: The study showed that temperature significantly impacts the performance of the catalyst, with higher temperatures enhancing H2 production in ethanol steam reforming reactions but reducing the catalyst's CO2 capture capacity.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Energy & Fuels
Chengxiong Dang, Zhiyuan Li, Juan Long, Wenwen Yang, Weiquan Cai
Summary: In this study, a highly stable bifunctional catalyst was designed, which exhibited improved sintering resistance through surface spatial confinement strategy to suppress the aggregation and migration of Ca and NiO particles, and achieved efficient SESR reaction.
Article
Chemistry, Multidisciplinary
Silvera Scaccia, Livia Della Seta, Daniele Mirabile Gattia, Giuseppina Vanga
Summary: A novel Ni/CaO-Ca12Al14O33 catalyst was prepared by Ni wet impregnation on a mixed calcium-aluminum-oxide (CAO) support, which exhibited good stability and low carbon deposition during dry reforming of methane. In contrast to the reference catalyst Ni/gamma-Al2O3, the novel catalyst showed higher basicity and better performance in the reaction.
JOURNAL OF CO2 UTILIZATION
(2021)
Article
Engineering, Chemical
Oscar Ovalle-Encinia, Han-Chun Wu, Tianjia Chen, Jerry Y. S. Lin
Summary: Experimental and simulation results demonstrate the feasibility of hydrogen production with simultaneous CO2 removal through steam reforming of methane in a CO2-perm-selective membrane reactor. The mathematical model accurately describes the process, showing that adjusting permeation number, Damkohler number, reaction pressure, and sweep side conditions can enhance H2 yield and CO2 recovery.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Energy & Fuels
Dan Zhou, Zhiyuan Li, Yaoqi Deng, Chengxiong Dang, Weiquan Cai
Summary: Sorption-enhanced biogas steam reforming with a Pb-modified Ni-CaO catalyst shows excellent stability and can continuously produce high-purity hydrogen.
Article
Engineering, Environmental
Yongqing Xu, Bowen Lu, Cong Luo, Jian Chen, Zewu Zhang, Liqi Zhang
Summary: The study successfully improved the quality of H-2 gas produced during the sorption enhanced steam reforming (SESRE) process of ethanol by coupling novel CaO-based porous spherical sorbents with conventional Ni/Al2O3 catalyst. The results showed that the sorption enhanced steam reforming process is an effective and flexible way to produce high-quality H-2 around 600 degrees C, and the simulated sorption enhanced process was experimentally validated.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Engineering, Chemical
Jonghun Lim, Chonghyo Joo, Jaewon Lee, Hyungtae Cho, Junghwan Kim
Summary: This study proposes a novel SMR process that utilizes desalination wastewater to reduce CO2 emissions and produce carbon-neutral hydrogen. The process model captures CO2 from the SMR process and uses mineral ions in desalination wastewater to carbonate the captured CO2. The economic feasibility of the proposed process is demonstrated through the assessment of the levelized cost of hydrogen.
Article
Chemistry, Physical
Zhiyuan Li, Weiquan Cai, Chengxiong Dang
Summary: This study reports a general template-based approach using carbon microspheres and alkali modification to synthesize highly effective bi-functional catalyst, which exhibits excellent stability and high performance.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Engineering, Chemical
Yi Ran Lu, Petr A. Nikrityuk
Summary: This work presents a new 3D DEM-based model for steam reforming of methane in a tube filled with spherical catalyst particles. The model accurately predicts intraparticle and interparticle heat and mass transfer, showing good agreement with a 3D-CFD-based model.
CHEMICAL ENGINEERING SCIENCE
(2022)
Article
Chemistry, Applied
Dimitris Ipsakis, Eleni Heracleous, Lishil Silvester, Dragomir B. Bukur, Angeliki A. Lemonidou
Article
Chemistry, Applied
V-L Yfanti, A. A. Lemonidou
Editorial Material
Chemistry, Applied
Nimir O. Elbashir, Anjaneyulu Chatla, Angeliki Lemonidou, James J. Spivey
Article
Chemistry, Applied
Marinela D. Zhurka, Angeliki A. Lemonidou, Panagiotis N. Kechagiopoulos
Summary: Rh is more active and selective than Ni, while CeO2-ZrO2-La2O3 efficiently promotes the water gas shift reaction, leading to higher activity, selectivity, and stability in Rh/CeO2-ZrO2-La2O3 catalyst for ethanol steam reforming.
Article
Engineering, Chemical
Theodoros Papalas, Andy N. Antzaras, Angeliki A. Lemonidou
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2020)
Article
Chemistry, Applied
Andy N. Antzaras, Eleni Heracleous, Angeliki A. Lemonidou
Summary: In this study, hybrid, multifunctional catalytic materials based on NiO and CaO were developed for the Sorption Enhanced Chemical Looping Steam Methane Reforming (SE-CL-SMR) process, achieving high CH4 conversion and high-purity hydrogen production at 650 degrees C. Compared to a mixed bed of sorbent and oxygen transfer material, operation with the multifunctional material allows for more efficient use of the heat generated during regeneration.
Article
Chemistry, Physical
Stavros A. Theofanidis, Charis Loizidis, Eleni Heracleous, Angeliki A. Lemonidou
JOURNAL OF CATALYSIS
(2020)
Article
Engineering, Environmental
Athanasios Scaltsoyiannes, Andy Antzaras, Georgios Koilaridis, Angeliki Lemonidou
Summary: Calcium looping is an attractive technology for post-combustion CO2 capture, hydrogen production, and energy storage applications. The carbonation reaction is a first-order process with respect to CO2 in the gas phase, and the developed kinetic model can predict the carbonation rate of CaO-based materials regardless of the type and percentage of the contained inert phase.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Engineering, Environmental
Mohammad Heidari, Maryam Tahmasebpoor, Andy Antzaras, Angeliki A. Lemonidou
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2020)
Article
Chemistry, Multidisciplinary
Theodoros Papalas, Andy N. Antzaras, Angeliki A. Lemonidou
Summary: This study investigated the CO2 capture performance of MgO derived from mineral magnesite doped with limestone and molten Li, Na, and K nitrates, showing that increasing the molten promoter loading can enhance CO2 sorption rate, while higher CaCO3 content impedes CO2 diffusion. Despite morphological transformations during cyclic operation, redistribution of alkali salts contributes to the stability and promising performance of the sorbent.
JOURNAL OF CO2 UTILIZATION
(2021)
Article
Chemistry, Physical
Stavros A. Theofanidis, G. T. Kasun Kalhara Gunasooriya, Ioanna Itskou, Maria Tasioula, Angeliki A. Lemonidou
Summary: The study reveals the potential of using iron oxide as a catalyst support for the on-purpose ethylene production through CO2-assisted oxidative dehydrogenation of ethane. The selectivity of the catalyst towards C-H bond cleavage can be controlled by adjusting the Ni/Fe ratio. Fine-tuning the Ni/Fe molar ratio leads to stable catalytic performance with improved selectivity towards ethylene and ethane conversion.
Article
Chemistry, Physical
Maria Tasioula, Emmanuelle de Clermont Gallerande, Stavros A. Theofanidis, Alessandro Longo, Kirill A. Lomachenko, Christoph Sahle, Angeliki A. Lemonidou
Summary: Iron oxide-based catalysts demonstrated highly selective conversion of CO2 to CO in parallel with ethane dehydrogenation, achieving 90% selectivity at a conversion rate of 23.3%. X-ray characterization techniques and structural modeling were used to understand the active sites responsible for C-H bond scission. The dynamic structural modifications of the catalysts during the reaction showed the crucial role of the support, resulting in unprecedented ethylene selectivity.
Article
Engineering, Chemical
Rita Kol, Elisabetta Carrieri, Sergei Gusev, Michiel Verswyvel, Norbert Niessner, Angeliki Lemonidou, Dimitris S. Achilias, Steven De Meester
Summary: The potential of filtration and centrifugation was analyzed to remove impurities and pigments from polystyrene waste. Filtration showed poor performance in removing PB-PS particles, while centrifugation successfully separated particles and pigments, reducing turbidity. Centrifugation can be used for initial cleaning of polystyrene waste to facilitate further processing.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Marinela D. Zhurka, James A. Anderson, Alan J. McCue, Angeliki A. Lemonidou, Panagiotis N. Kechagiopoulos
Summary: Sustainable hydrogen production from bio-ethanol can be improved by using low-cost and abundant minerals as catalyst supports. This study focuses on the kinetic study of ethanol steam reforming using a Ni catalyst supported on natural sepiolite, and investigates the effect of the support on the reaction mechanism. It is found that the mechanism depends on the catalyst calcination temperature and degree of hydration of the sepiolite, with the presence of multiple adsorption sites for oxygenates and water.
REACTION CHEMISTRY & ENGINEERING
(2023)
Article
Chemistry, Applied
Andy N. Antzaras, Eleni Heracleous, Angeliki A. Lemonidou
FUEL PROCESSING TECHNOLOGY
(2020)