Article
Chemistry, Physical
Lucas G. Moura, Rafael P. Borges, Fabio B. Noronha, Carla E. Hori
Summary: The study investigated the catalytic activity and stability of nickel, platinum, rhodium, and ruthenium-based catalysts during hydrogen production from steam reforming of liquefied petroleum gas. It was found that rhodium and platinum catalysts exhibited higher catalytic activity and lower deactivation compared to nickel and ruthenium catalysts. Small increases in particle sizes of Ni(0) and Ru(0) during the process could contribute to the faster deactivation of Ru/CS and Ni/CS catalysts.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Applied
Farshad Gholizadeh, Ali Izadbakhsh, Jiankun Huang, Yan Zi-Feng
Summary: A series of Ni-based catalysts supported on cubic ordered mesoporous alumina (COMA) were synthesized and tested in dry reforming of methane reaction. The 15%NiO/COMA catalyst showed the best catalytic performance, with stability test results proving no activity loss after 210 hours, demonstrating excellent catalytic stability of the COMA structure in DRM reaction.
MICROPOROUS AND MESOPOROUS MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Elena A. Straumal, Andrey A. Mazilkin, Inna O. Gozhikova, Lyudmila L. Yurkova, Sergey Yu Kottsov, Sergey A. Lermontov
Summary: The aim of this study is to investigate the influence of solvents used in the sol-gel process and supercritical drying on the properties of NiO aerogels. It was found that the specific surface area, phase, and chemical composition strongly depend on the synthesis conditions. Using 2-methoxy-ethanol as a solvent can reduce Ni2+ to Ni-0.
Article
Chemistry, Physical
Zhoufeng Bian, Wenqi Zhong, Yang Yu, Zhigang Wang, Bo Jiang, Sibudjing Kawi
Summary: Catalysts of Ni supported on home-made mesoporous alumina exhibited high activity and stability in DRM, with NiAl2O4 spinel structure contributing to improved performance. Control of calcination temperature is crucial for catalyst properties.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Engineering, Multidisciplinary
Nissrine El Hassan, Karam Jabbour, Anis H. Fakeeha, Yara Nasr, Muhammad A. Naeem, Salwa Bader Alreshaidan, Ahmed S. Al-Fatesh
Summary: Biogas, a renewable energy source, can be efficiently utilized through reforming and decomposition, resulting in the production of carbon nanofibers using catalysts.
ALEXANDRIA ENGINEERING JOURNAL
(2023)
Article
Engineering, Chemical
Jaya Sharma, Shivangi Shukla, Javed Sheikh, B. K. Behera
Summary: Replacing the solvent with air in silica aerogel production is crucial for desired physical properties. Drying by evaporation under ambient pressure leads to shrinkage and collapse of the gel network. This research prepared uniform sol using sonication and modified the wet gel surface with trimethylchlorosilane (TMCS). Characterization techniques were used to evaluate the properties of the prepared aerogels. The results showed that the silica aerogel was thermally stable up to 800°C and remained hydrophobic up to 350°C, with a porous structure confirmed by FE-SEM and XRD.
Article
Chemistry, Physical
Luiz G. Possato, Rosembergue G. L. Goncalves, Rodrigo M. M. Santos, Thiago F. Chaves, Valerie Briois, Sandra H. Pulcinelli, Leandro Martins, Celso Santilli
Summary: This study reports the improved catalytic activity of nickel catalysts supported on nanocrystalline magnesium oxide prepared by a sol-gel method. The presence of Pluronic reduced the magnesium oxide crystallite size and formed small supported metallic nickel particles. Materials synthesized with the surfactant showed heightened activity in the ethanol steam reforming reaction and improved long-term stability of the catalysts by reducing coke formation.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Physical
Cassiano Cunha Oliveira, Carla Eponina Hori
Summary: This study evaluated the performance of nickel-based catalysts supported on CaO and CaO-MgO-Al2O3 in the sorption enhanced steam reforming of ethanol. The addition of MgO and Al2O3 to CaO improved the stability and purity of the catalyst.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
S. Sayas, N. Vivo, J. F. Da Costa-Serra, A. Chica
Summary: The study demonstrates that nickel catalyst supported on sepiolite exhibits promising catalytic performance in steam reforming of toluene, especially when prepared using precipitation method. This alternative method results in a catalyst with higher activity, selectivity to hydrogen, and lower production of undesirable by-products compared to the traditional incipient wetness impregnation method.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Adane Muche Abebe, Gian Domenico Soraru, Ganesh Thothadri, Dinsefa Mensur Andoshe, Andrea Zambotti, Gulam Mohammed Sayeed Ahmed, Vineet Tirth, Ali Algahtani
Summary: In this article, highly porous and transparent silicon oxycarbide (SiOC) gels were successfully synthesized using the sol-gel technique. The gels were then pyrolyzed to form SiOC ceramics. The experimental results showed that the synthesized gels had high surface areas and pore volumes, and formed mesoporous structures. The appearance and properties of the gel samples varied under different treatment conditions.
Article
Chemistry, Physical
Pawel Mierczynski, Magdalena Mosinska, Waldemar Maniukiewicz, Krasimir Vasilev, Malgorzata Iwona Szynkowska-Jozwik
Summary: This study compares the physicochemical and reactivity of various bimetallic Pt-Ni, Pd-Ni, Ru-Ni, and Ag-Ni catalysts in the oxy-steam reforming of LNG for hydrogen generation. The 1%Pt-5%Ni catalyst supported on CeO2·ZrO2 (1:2) system demonstrated the highest activity, showing potential for hydrogen production for solid oxide fuel cells.
Article
Chemistry, Physical
Rafael D. T. Barreto, Luiz Pereira Ramos, Regina Maria M. Jorge, Luiz Mario M. Jorge
Summary: A sol-gel Ni-Mo2C-Al2O3 catalyst is used in glycerol steam reforming for syngas production for the first time. The catalyst's stability and activity are investigated at temperatures ranging from 550°C to 700°C and for up to 30 hours. Increasing the reaction temperature from 550°C to 700°C boosts H2 yield from 22% to 60%. The catalyst shows high stability for 30 hours at milder conditions, with final conversion, H2 yield, and H2/CO ratio of 95%, 53%, and 1.95, respectively. Additionally, the morphology of carbon deposits on spent catalysts becomes more graphitic with higher reaction temperatures, and total coke formation is mitigated by increasing temperature and lowering GHSV. (c) 2023 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Multidisciplinary
Reza Babakouhi, Seyed Mehdi Alavi, Mehran Rezaei, Ehsan Akbari, Mohammad Varbar
Summary: This research investigated the use of cerium and zirconium as alumina support promoters for nickel-based catalysts in methane combined reforming process. The addition of cerium and zirconium improved the metal dispersion and reduced carbon formation. Various analyses were performed to characterize the synthesized catalysts, and the results showed high BET area and mesoporous structure. The catalyst promoted with cerium oxide exhibited the highest activity and the addition of oxygen reduced carbon formation. The 10 wt%Ni/Al2O3-10%CeO2 catalyst with the highest specific surface area showed the best performance.
JOURNAL OF CO2 UTILIZATION
(2023)
Article
Chemistry, Physical
Sujoy Bepari, Joy Jyoti Sarkar, Narayan C. Pradhan
Summary: In this study, olivine was used as a support for nickel catalyst in the steam reforming of ethanol. Among different catalysts, the 5% Ni on olivine catalyst showed the highest hydrogen yield and ethanol conversion. The catalyst activity was analyzed by varying temperature, ethanol to water molar ratio, and space-time. The optimal conditions for the ethanol steam reforming reaction were found to be 550 degrees C, an ethanol to steam molar ratio of 1:10, and a space-time of 7.94 kg cat h/kmol ethanol.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Materials Science, Ceramics
Hae-Noo-Ree Jung, Haryeong Choi, Sang-Hyun Kim, Wook Ki Jung, Hyung-Ho Park
Summary: This study investigates the effect of surfactants (non-ionic, cationic, or anionic) on alumina aerogels. The findings show that the charge-charge interactions between surfactants and cationic inorganic species in the aluminum precursor influence the pore structure of the aerogels. Controlling the surfactant concentration allows for control over the pore structure of the aerogels.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2023)
Article
Chemistry, Physical
Jae-Sung Bae, Seok Yong Hong, Ji Chan Park, Geun Bae Rhim, Min Hye Youn, Heondo Jeong, Shin Wook Kang, Jung-Il Yang, Heon Jung, Dong Hyun Chun
APPLIED CATALYSIS B-ENVIRONMENTAL
(2019)
Article
Chemistry, Physical
Jin Hee Lee, Hack-Keun Lee, Dong Hyun Chun, Hyunkyung Choi, Geun Bae Rhim, Min Hye Youn, Heondo Jeong, Shin Wook Kang, Jung-Il Yang, Heon Jung, Chul Sung Kim, Ji Chan Park
Article
Energy & Fuels
Young-eun Kim, Hyo Been Im, Un Ho Jung, Ji Chan Park, Min Hye Youn, Heon-Do Jeong, Dong-Wook Lee, Geun Bae Rhim, Dong Hyun Chun, Ki Bong Lee, Kee Young Koo
Article
Chemistry, Physical
Hack-Keun Lee, Jin Hee Lee, Jong Hyuk Seo, Dong Hyun Chun, Shin Wook Kang, Dong Wook Lee, Jung-Il Yang, Geun Bae Rhim, Min Hye Youn, Heon-Do Jeong, Heon Jung, Ji Chan Park
JOURNAL OF CATALYSIS
(2019)
Article
Chemistry, Multidisciplinary
Jumi Hong, Harim Kim, Ji Eun Lee, You Na Ko, Ki Tae Park, Young Eun Kim, Min Hye Youn, Soon Kwan Jeong, Jinwon Park, Wonhee Lee
KOREAN JOURNAL OF CHEMICAL ENGINEERING
(2020)
Article
Energy & Fuels
Ji Eun Lee, Dong Hyun Chun, Geun Bae Rhim, Deviana Deviana, Heon Do Jeong, Ji Chan Park, Kee Young Koo, Soon Kwan Jeong, Chang Seop Hong, Min Hye Youn
Review
Chemistry, Applied
Dong Hyun Chun, Geun Bae Rhim, Min Hye Youn, Deviana Deviana, Ji Eun Lee, Ji Chan Park, Heondo Jeong
TOPICS IN CATALYSIS
(2020)
Article
Energy & Fuels
Dea Hyun Moon, Jun Eu, Wonhee Lee, Young Eun Kim, Ki Tae Park, You Na Ko, Soon Kwan Jeong, Min Hye Youn
GREENHOUSE GASES-SCIENCE AND TECHNOLOGY
(2020)
Article
Chemistry, Multidisciplinary
Daniel Tan, Wonhee Lee, Young Eun Kim, You Na Ko, Min Hye Youn, Ye Eun Jeon, Jumi Hong, Soon Kwan Jeong, Ki Tae Park
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2020)
Article
Engineering, Environmental
Young Eun Kim, Beomil Kim, Wonhee Lee, You Na Ko, Min Hye Youn, Soon Kwan Jeong, Ki Tae Park, Jihun Oh
Summary: The study focuses on investigating Ag/TiO2 catalysts for electrochemical reduction of CO2 to syngas with a controllable H-2/CO ratio. By manipulating oxygen vacancies and phase differences of TiO2, a stable H-2/CO ratio was achieved with high Faradaic efficiency and partial current densities. The introduction of oxygen vacancy defects and phase changes in TiO2 influenced the H-2/CO ratio of the catalyst, showing promising results for syngas production.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Multidisciplinary
Dea Hyun Moon, Arti Murnandari, Omotayo Salawu, Chan-Woo Lee, Wonhee Lee, Young Eun Kim, Ki Tae Park, Ji Eun Lee, Jun Eo, Soon Kwan Jeong, Min Hye Youn
KOREAN JOURNAL OF CHEMICAL ENGINEERING
(2020)
Article
Chemistry, Multidisciplinary
Sun-Mi Hwang, Song Yi Choi, Min Hye Youn, Wonhee Lee, Ki Tae Park, Kannan Gothandapani, Andrews Nirmala Grace, Soon Kwan Jeong
Article
Energy & Fuels
Young-eun Kim, Unho Jung, Dahye Song, Hyo Been Im, Ji Chan Park, Min Hye Youn, Heon-Do Jeong, Geun Bae Rhim, Dong Hyun Chun, Dong-Wook Lee, Ki Bong Lee, Kee Young Koo
Article
Engineering, Environmental
Dea Hyun Moon, Sang Shin Park, Seong-Pil Kang, Wonhee Lee, Ki Tae Park, Dong Hyun Chun, Geun Bae Rhim, Sun-Mi Hwang, Min Hye Youn, Soon Kwan Jeong
Summary: The study examined the kinetics parameters of CO2 mineralization reaction using a static mixer, with a focus on the influence of Ca(OH)(2) dehydration rate. The use of a static mixer significantly improved the CO2 conversion rate, with turbulent flow effects playing a crucial role in the reaction efficiency.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Nanoscience & Nanotechnology
Daniel Tan, Wonhee Lee, Young Eun Kim, You Na Ko, Min Hye Youn, Ye Eun Jeon, Jumi Hong, Jeong Eun Park, Jaeho Seo, Soon Kwan Jeong, Yejung Choi, Hyuk Choi, Hyun You Kim, Ki Tae Park
Summary: CO2 electrocatalytic conversion is a viable approach to reduce the atmospheric CO2 concentration. In this study, the fabrication of indium-bismuth nanosphere demonstrated outstanding performance in efficient CO2 reduction to formate, surpassing traditional catalysts.
ACS APPLIED MATERIALS & INTERFACES
(2022)