Article
Chemistry, Applied
Monica Dan, Maria Mihet, Gheorghe Borodi, Mihaela D. Lazar
Summary: Three catalysts with bimodal pore structure, Ni/Al2O3, Ni/MgO-Al2O3, Ni/La2O3-Al2O3, were prepared and tested for combined steam and dry reforming of methane. Both magnesium and lanthanum oxides contributed to better dispersion and stabilization of Ni nanoparticles on the catalyst surface. Ni/La2O3-Al2O3 showed the best stability and catalytic activity among the tested catalysts.
Article
Energy & Fuels
Santiago Veiga, Mariano Romero, Ricardo Faccio, Dario Segobia, Carlos Apesteguia, Ana Laura Perez, Carlos Dante Brondino, Juan Bussi
Summary: In this study, Ni-La-Ti catalysts were synthesized using different methods and evaluated for their activity and stability in biogas dry reforming reaction. The catalyst prepared by impregnation showed the highest initial activity, but also the highest formation of solid carbon. The catalyst prepared by the modified Pechini method demonstrated good stability and resistance to Ni sintering.
Article
Materials Science, Multidisciplinary
Santiago Veiga, Ricardo Faccio, Mariano Romero, Juan Bussi
Summary: NiLaM (M = Ce and/or Zr) catalysts prepared by the polymerized complex method exhibited good activity and coke resistance in the dry, oxidative dry, and tri-reforming reactions of synthetic biogas. Catalysts with higher number of total basic sites and stronger Ni-support interaction showed the best performance, although NiLaCe catalysts deactivated due to nickel re-oxidation.
Article
Chemistry, Applied
Hale Akansu, Huseyin Arbag, H. Mehmet Tasdemir, Sena Yasyerli, Nail Yasyerli, Gulsen Dogu
Summary: This study investigated the effects of manganese incorporation on nickel-based sol-gel alumina-supported catalysts in the dry reforming of biogas. The catalysts showed stable activity in the absence of H2S and decreased activity in the presence of H2S. The presence of H2S in the feed stream led to the formation of COS and H2O, and manganese incorporation did not enhance the sulfur resistance of the nickel catalyst.
Article
Chemistry, Physical
Thanh Son Phan, Doan Pham Minh
Summary: Dry reforming of methane (DRM) is a promising process for producing synthetic gas, and the design of an effective catalyst is crucial. In this study, nickel catalysts supported by calcium hydroxyapatite (HAP) and HAP-doped magnesium (Mg_HAP) were synthesized and evaluated in the DRM reaction. The Ni/HAP and Ni/Mg_HAP catalysts showed outstanding performance due to the tunable acidity-basicity of the supports, strong metal-support interaction, and good thermal stability of nickel nanoparticles. The main products were H2 and CO, with stable selectivity around 85%, while H2O and solid carbon were byproducts with 5-10% selectivity.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Multidisciplinary
Yvan J. O. Asencios, Cristiane B. Rodella, Elisabete M. Assaf
Summary: Catalysts based on Ni/PrO2-ZrO2 mixtures show excellent catalytic performance in various reactions. The PrO2-ZrO2 solid solution as a catalytic support can enhance the production of syngas and reduce carbon deposition. In situ characterization of the catalysts reveals that higher PrO2 content helps optimize the catalyst structure and improve activity and stability.
JOURNAL OF CO2 UTILIZATION
(2022)
Review
Chemistry, Physical
Robinson L. Manfro, Mariana M. V. M. Souza
Summary: This review presents the recent advances in Ni-based catalysts for biogas reforming, discussing the effects of supports and promoters on catalyst performance and analyzing the influence of synthesis method, metal-support interaction, acid/base sites, and oxygen mobility on catalytic activity. It also highlights the development of core-shell structure catalysts and bimetallic catalysts of Ni with other transition metals and noble metals.
Article
Energy & Fuels
Mohd Razali Shamsuddin, Nasar Mansir, Arfaezah Anuar, Mohd Izham Saiman, Tengku Sharifah Marliza, Mohd Ambar Yarmo, Yun Hin Taufiq-Yap
Summary: The study investigated the synergetic effect between NiO and dolomite support in the dry reforming of methane process, with 10% NiO/dolomite catalyst showing superior performance in producing H-2 rich syngas. The catalytic reaction demonstrated high conversion rates of CH4 and CO2 to H-2, with minimal coke formation and dual site associative adsorption mechanism.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Energy & Fuels
Cao-Minh Vo, Anh Ngoc T. Cao, Amjad Saleh Qazaq, Cham Q. Pham, Dang Le Tri Nguyen, Mabkhoot Alsaiari, Tuan V. Vu, Ajit Sharma, Pham T. T. Phuong, Thuan Tran Van, Moustafa A. Rizk, Tung M. Nguyen, Dai-Viet N. Vo
Summary: This work investigated the upgrading of simulated biogas through dry reforming using calcium-promoted cobalt-based catalysts. The study found that the loading of calcium is critical in the catalyst performance, with low dosages resulting in smaller cobalt crystalline size and enhanced reducibility and basicity. The optimal catalyst showed high CH4 and CO2 conversions, as well as suppressed coke formation, leading to improved activity and stability. These findings offer new opportunities to enhance the performance of dry reforming using abundant catalysts.
Article
Chemistry, Physical
Pedro M. Araujo, Kevin M. da Costa, Fabio B. Passos
Summary: Nickel supported on perovskite supports showed high conversion and stability in the autothermal reforming of methane, especially Ni/CaTiO3 and Ni/BaTiO3. The alumina supported catalyst exhibited the highest initial conversion and selectivity, but deactivated over time.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Engineering, Multidisciplinary
Salma A. Al-Zahrani, Ahmed S. Al-Fatesh, Marie-Nour Kaydouh, Ahmed Al Otaibi, Frusteri Francesco, Anis H. Fakeeha, Nissrine El Hassan
Summary: The promotional effect of cesium on yttria-zirconia-supported nickel catalysts in dry reforming of methane is studied for the first time. It is found that an appropriate amount of cesium can improve the carbon resistance of the catalysts, but excessive cesium reduces the catalytic performance. The optimum loading of cesium is determined to be 0.5-1.0 wt%.
ALEXANDRIA ENGINEERING JOURNAL
(2023)
Article
Agricultural Engineering
Amro Hassanein, Emily Keller, Stephanie Lansing
Summary: This study demonstrates that the use of nanoparticle (NP) mixtures can increase methane production and decrease hydrogen sulfide production during anaerobic digestion, while also showing higher concentrations of NPs in the digestate and increased uptake of NPs by plants.
BIORESOURCE TECHNOLOGY
(2021)
Article
Chemistry, Physical
Andre L. A. Marinho, Fabio S. Toniolo, Fabio B. Noronha, Florence Epron, Daniel Duprez, Nicolas Bion
Summary: Ni-based mesoporous mixed CeO2-Al2O3 oxide catalysts prepared by one pot EISA method show high activity and stability in dry reforming of methane, attributed to the confinement of Ni particles and the inhibition of carbon deposition.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Chemistry, Applied
Pedro Nothaft Romano, Jose Faustino Souza de Carvalho Filho, Joao Monnerat Araujo Ribeiro de Almeida, Eduardo Falabella Sousa-Aguiar
Summary: A series of mono and bimetallic catalysts based on Ni, Rh, and Pd supported on different materials were evaluated for the dry reforming of methane reaction. Ni-based catalysts suffered from deactivation but could be regenerated, while Pd-based catalysts deactivated due to coke deposition. Rh-based catalysts showed remarkable activity and stability.
Article
Chemistry, Multidisciplinary
Jose Manuel Martinez Perez, Carlos J. Lucio-Ortiz, Javier Rivera de la Rosa, Carolina Solis Maldonado, David A. De Haro Del Rio, Ladislao Sandoval-Rangel, M. A. Garza-Navarro, Daniela Xulu Martinez-Vargas, Francisco Jose Morales-Leal
Summary: The study synthesized Pt-Fe catalysts on gamma-Al2O3 with varying metal load for hydrogen production via dry reforming of methane. Results showed that catalyst characteristics like specific surface area, average crystallite size, and morphology played a role in methane reforming performance.
Article
Chemistry, Analytical
Cornelia Veronica Floare-Avram, Olivian Marincas, Ioana Feher, Florina-Dorina Covaciu, Calin Gabriel Floare, Mihaela Diana Lazar, Dana Alina Magdas
Summary: This study investigated the adsorption of bisphenol A (BPA) and carbamazepine (CBZ) from aqueous solution using two carbonaceous materials. The results showed that partially reduced graphene oxide had a higher adsorption capacity compared to graphene oxide, making it a promising adsorbent.
ANALYTICAL LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Thomas Dippong, Erika Andrea Levei, Iosif Grigore Deac, Mihaela Diana Lazar, Oana Cadar
Summary: (Co0.4Zn0.4Ni0.2Fe2O4)(alpha)(SiO2)((100-alpha)) samples with different proportions of Co0.4Zn0.4Ni0.2Fe2O4 nanoparticles embedded in SiO2 were synthesized and characterized. The samples were analyzed using various techniques including thermal analysis, Fourier-transform infrared spectroscopy, X-ray diffraction, transmission electron microscopy, inductively coupled plasma optical emission spectrometry, and magnetic measurements. The results showed the formation of poorly crystalline Co-Zn-Ni ferrite at low annealing temperatures and highly crystalline Co-Zn-Ni ferrite along with traces of Fe2SiO4 and SiO2 at higher annealing temperatures. The magnetic properties improved with the increase in ferrite content and annealing temperature.
Article
Chemistry, Multidisciplinary
Daniela Alexandra Scurtu, Eniko Kovacs, Lacrimioara Senila, Erika Andrea Levei, Dorina Simedru, Xenia Filip, Monica Dan, Cecilia Roman, Oana Cadar, Leontin David
Summary: Due to concerns over environmental impacts in the construction industry, researchers have been studying ways to develop sustainable materials using waste. This study introduces an innovative cement-based composite material containing vine shoot waste, which enhances hydration product formation and leads to a more compact and dense structure. Various techniques, including microscopy and spectroscopy, were used to characterize the structure and confirm the increased hydration product formation.
APPLIED SCIENCES-BASEL
(2023)
Article
Biochemistry & Molecular Biology
Anca Petran, Teodora Radu, Monica Dan, Alexandrina Nan
Summary: The interest in polymers with high thermal conductivity has increased due to their inherent properties and potential applications. This research focused on developing polymers with high thermal conductivity by enzyme-catalyzed polymerization. The results showed a significant increase in thermal conductivity compared to thermal polymerization.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Chemistry, Applied
Oana Grad, Monica Dan, Lucian Barbu-Tudoran, Nicoleta Tosa, Mihaela D. Lazar, Gabriela Blanita
Summary: This study investigates the synthesis of hierarchical MOFs/gamma-Al2O3 composites under hydrothermal conditions by depositing MIL-53(Cr) or MIL-101(Cr) on the surface of porous alumina supports. The influence of different parameters on the nature and quality of the composites is systematically studied. The results show that successful synthesis conditions for MIL-53(Cr)/gamma-Al2O3 composites are 150 degrees C, 12 h, and a specific molar ratio.
MICROPOROUS AND MESOPOROUS MATERIALS
(2023)
Article
Chemistry, Physical
Abdalla Hroub, Mohamad Hasan Aleinawi, Maria Stefan, Maria Mihet, Alexandra Ciorita, Feray Bakan-Misirlioglu, Emre Erdem, Arpad Mihai Rostas
Summary: In this study, vanadium (V)-doped MgO nanoparticles were used as electrode materials in all-in-one solid-state supercapacitors. The structural and morphological properties of the prepared samples were thoroughly analyzed using various techniques. The results showed that the V-doped MgO material displayed excellent capacitance performance and a maximum energy density of 4.17 Wh/kg. The addition of booster material like carbon black further enhanced the specific capacitance value to 1200 F/g, a value never reported before for MgO-based materials.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Energy & Fuels
Cigdem Tuc Altaf, Tuluhan Olcayto Colak, Arpad Mihai Rostas, Maria Mihet, Mihaela Diana Lazar, Igor Iatsunskyi, Emerson Coy, Ipek Deniz Yildirim, Feray Bakan Misirlioglu, Emre Erdem, Mehmet Sankir, Nurdan Demirci Sankir
Summary: The development of photo-supercapacitors (PSC) is crucial for harnessing solar energy efficiently and reducing carbon emissions. This study reveals the critical ratios for graphene oxide/zinc oxide (GO/ZnO) composites in terms of PSC performance, demonstrating low photoluminescence intensity and defect densities for the optimal ratio. The best-performing GO/ZnO composites showed a 2.7-fold increase in specific capacitance after UV illumination and maintained exceptional stability over 30,000 charge and discharge cycles. The maximum energy and power densities were found to be 6.3 Whkg(-1) and 625 Wkg(-1) respectively, and a digital watch was successfully powered using GO/ZnO-based PSC under UV and AM1.5 sunlight illumination.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Engineering, Environmental
Oana Grad, Angela M. Kasza, Alexandru Turza, Monica Dan, Lucian Barbu-Tudoran, Mihaela D. Lazar, Maria Mihet
Summary: This study presents a novel and feasible method to obtain Ni catalysts for CO2 methanation using sacrificial MIL-53(Al). The sacrificial MIL-53(Al) was obtained through a less time and energy-consuming hydrothermal synthesis, without compromising its structural and textural properties. The subsequent Ni catalysts derived from MIL-53(Al) exhibited an ordered mesoporous structure, uniform distribution of Ni nanoparticles, and enhanced H2 and CO2 adsorption capacity compared to the reference catalyst (Ni/Al-(com)).
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Correction
Materials Science, Multidisciplinary
Cigdem Tuc Altaf, Arpad Mihai Rostas, Maria Mihet, Mihaela Diana Lazar, Igor Iatsunskyi, Emerson Coy, Emre Erdem, Mehmet Sankir, Nurdan Demirci Sankir
Summary: This article discusses an improved method for solar-assisted all-solid supercapacitors using composite nanostructures of ZnO nanowires with GO and rGO.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Chemistry, Applied
Monica Dan, Maria Mihet, Lucian Barbu-Tudoran, Mihaela D. Lazar
Summary: In this study, Ni/CeO2-Al2O3 catalysts with different CeO2 concentrations were prepared and tested for their catalytic performance in the synthesis of synthesis gas. It was found that the Ni/CeO2-Al2O3 catalyst with 5 wt% CeO2 exhibited the best catalytic activity, which can be attributed to the closer contact between ceria and alumina and the larger pore size.
MICROPOROUS AND MESOPOROUS MATERIALS
(2022)
