Review
Chemistry, Multidisciplinary
M. B. Bahari, C. R. Mamat, Aishah Abdul Jalil, T. J. Siang, N. S. Hassan, N. F. Khusnun, W. Nabgan, N. A. Roslan, S. Z. Abidin, H. D. Setiabudi, D-V N. Vo
Summary: This article reviews the glycerol valorization routes for hydrogen or syngas generation and focuses on cobalt-based catalysts. By improving the properties of the catalysts, glycerol conversion and dihydrogen yield can be increased, while coke deposition can be reduced.
ENVIRONMENTAL CHEMISTRY LETTERS
(2022)
Article
Chemistry, Applied
Paola Riani, Gabriella Garbarino, Tullio Cavattoni, Guido Busca
Summary: Two Co/SiO2 catalysts exhibit different catalytic behaviors in CO2 methanation and reverse water gas shift reactions, with carbon nanotubes produced not affecting the catalyst activity.
Review
Chemistry, Physical
Xingyuan Gao, Yili Wen, Rui Tan, Haiqing Huang, Sibudjing Kawi
Summary: In this review, the issue of catalyst deactivation in thermo-catalytic hydrogen production from methane is discussed, and six modification strategies to achieve a robust catalyst are proposed. The reaction mechanisms of seven methane-involved reactions and three deactivation mechanisms are illustrated. Furthermore, a critical analysis of the synthesis-structure-performance relationship is provided, and conclusive remarks and prospects are proposed.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Energy & Fuels
Anh Ngoc T. Cao, Cham Q. Pham, Tung M. Nguyen, Thuan Van Tran, Pham T. T. Phuong, Dai-Viet N. Vo
Summary: Dysprosium (Dy) promoted Co/Al2O3 catalysts with different Dy loadings were synthesized and found to enhance the basicity and activity of the catalysts for methane dry reforming. The addition of Dy reduced the crystallite size of Co3O4, resulting in better metal dispersion and higher catalytic performance. The optimal Dy loading was found to be 0.3 wt%, achieving the highest CH4 conversion and H-2 and CO yields.
Review
Chemistry, Multidisciplinary
Cham Q. Pham, Mahadi B. Bahari, Ponnusamy Senthil Kumar, Shams Forruque Ahmed, Leilei Xiao, Sunil Kumar, Amjad Saleh Qazaq, Tan Ji Siang, Huu-Tuan Tran, Aminul Islam, Adel Al-Gheethi, Yasser Vasseghian, Dai-Viet N. Vo
Summary: The Ukraine war has highlighted the urgency of addressing energy and environmental issues, leading to the need for alternative and localized fuels. Research on converting carbon dioxide into methane through catalytic conversion has shown promising results, with high conversion and methane selectivity achieved by adjusting reaction conditions and increasing the supply of dihydrogen. However, catalyst deactivation remains a challenge.
ENVIRONMENTAL CHEMISTRY LETTERS
(2022)
Article
Energy & Fuels
Mumtaj Shah, Mohammed K. Al Mesfer, Mohd Danish
Summary: In this study, the performance of 10 wt.% Co-1 wt. % Rh/TiO2 catalysts with varying textural properties were investigated for the production of hydrogen and carbon nanotubes via methane decomposition. The results showed that the texture of the TiO2 support has a significant influence on the catalytic performance, and the optimal activity and stability can be achieved by controlling the calcination temperature and phase composition of TiO2. Furthermore, the phase composition of the catalyst also affects the formation of carbon nanotubes.
Article
Chemistry, Physical
Dongyang Zhang, Jianbo Zhang, Run Li, Huiyong Chen, Qingqing Hao, Yonghui Bai, Jianxuan Shang, Lei Zhang, Xiaoxun Ma
Summary: This study investigates the effects of thermal treatment temperature and nickel nitrate impregnation concentration on the CO2 methanation reaction using commercially available coal char supported nickel catalysts.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Engineering, Environmental
Qiang Liu, Pan Wu, Jian He, Wei Jiang, Changjun Liu
Summary: Catalytic decomposition of methane is a more economical and environmentally friendly method for meeting small to medium scale demand of high purity hydrogen. A novel NiFe/Al2O3/Fe-frame catalyst supported by iron knitting gauze was prepared and showed longer catalyst service time and slower pressure drop buildup. The catalyst achieved a high hydrogen production rate of 9.48 mmol·g(-1)·min(-1) and a catalyst life of 600 min. The deposition of carbon products, mainly carbon nanotubes, was found to preferentially occur on the leeward side of the gauze catalyst, and the graphitization degree decreased over time. The porosity of the NiFe/Al2O3/Fe-frame decreased due to the growth of carbon. The apparent activation energy of methane decomposition varied with the packing modes of catalysts. The pressure drop buildup was slower in a monolithic packing bed compared to a filled packing bed, but similar to a tiling type one. The NiFe/Al2O3/Fe-frame catalyst was found to be an efficient and productive catalyst for producing high-purity hydrogen through the catalytic decomposition of methane.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Physical
Brock Lumbers, David W. Agar, Joachim Gebel, Frank Platte
Summary: The demand for low-emission hydrogen is increasing as the world moves towards a hydrogen economy. The thermo-catalytic methane decomposition (TCMD) process offers a promising solution as it generates no carbon dioxide emissions and utilizes existing gas infrastructure. However, the high catalyst turnover costs hinder widespread adoption of this process. This study identifies a feasible TCMD process and develops a mathematical model to estimate hydrogen production rate and catalyst turnover costs. The optimal process parameters are determined, maximizing hydrogen production rate and minimizing catalyst turnover costs, enhancing the economic potential and commercial viability of the process.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Israel R. Azevedo, Andressa A. A. da Silva, Yutao T. Xing, Raimundo C. Rabelo-Neto, Niels T. J. Luchters, Jack C. Q. Fletcher, Fabio B. Noronha, Lisiane V. Mattos
Summary: This study investigated the influence of dopants (Gd, Nb, Pr, and Zr) on the performance of Pt/CexMe1-xO2-g/Al2O3 catalysts for methane steam reforming. The results showed that dopants improved the reducibility and stability of the catalysts, with Nb-doped ceria demonstrating the highest stability.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Engineering, Chemical
Camilla Daniela Moura-Nickel, Jessica Tatianne Ortiz Florenciano, Gidiane Scaratti, Regina de Fatima Peralta Muniz Moreira, Humberto Jorge Jose
Summary: The coke deposition deactivating catalyst is a challenge during reforming processes. However, the use of in situ CO2 for coke gasification at 650-700 degrees C can recover the catalytic activity, while temperature higher than 700 degrees C may cause deactivation by sintering. The regeneration method using CO2 is an excellent alternative to traditional air oxidation reactions for removing coke, as it not only produces useful CO but also allows the maintenance of reactor operating conditions.
CHEMICAL ENGINEERING SCIENCE
(2021)
Article
Multidisciplinary Sciences
Supanida Saconsint, Nonthicha Sae-tang, Atthapon Srifa, Wanida Koo-Amornpattana, Suttichai Assabumrungrat, Choji Fukuhara, Sakhon Ratchahat
Summary: In this study, a suitable catalyst for the simultaneous production of hydrogen-rich syngas and multi-walled carbon nanotubes was investigated. The NiMo/MgO catalyst exhibited excellent catalytic performance, achieving high conversions of CH4 and CO2 as well as producing high-quality syngas. Additionally, the use of NiMo/MgO catalyst resulted in the formation of well-aligned and high-purity CNTs, while the use of trimetallic catalysts led to deactivation.
SCIENTIFIC REPORTS
(2022)
Review
Chemistry, Physical
Shahla Karimi, Fatemeh Bibak, Fereshteh Meshkani, Ali Rastegarpanah, Jiguang Deng, Yuxi Liu, Hongxing Dai
Summary: This review focuses on the use of different promoters in controlling the deactivation of nickel-based catalysts in the thermocatalytic decomposition of methane (TCD) process and their impact on the formed carbon nanomaterials. By discussing the classification of different promoters and their mechanisms of action in detail, it provides a reference for the design of catalysts for efficient pure hydrogen production and carbon nanomaterials.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Engineering, Environmental
W. Henao, F. Cazana, P. Tarifa, E. Romeo, N. Latorre, V. Sebastian, J. J. Delgado, A. Monzon
Summary: The study evaluated the influence of reaction conditions on the yield and quality of carbon nanotubes, finding that the best operating parameters for high productivity and quality were at 750 degrees C with a gas composition of 28.6% CH4, 14.3% H2, and 57.1% N2.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Physical
Robert Franz, Donato Pinto, Evgeny A. Uslamin, Atsushi Urakawa, Evgeny A. Pidko
Summary: This study investigates the use of Ni/Al2O3 catalysts for dry reforming of methane, with a focus on the effects of different promoters on catalyst stability. Higher iron loading on the catalyst leads to lower coke formation during dry reforming. Additionally, promoters with high CO2 affinity can accelerate catalyst oxidation during regeneration, ultimately leading to sintering and increased coke formation. Promoters with significant CO2 interaction are more effective on sintered catalyst samples compared to unpromoted Ni/Al2O3.
Article
Environmental Sciences
Marina Avena Maia, Guilherme L. Dotto, Oscar W. Perez-Lopez, Mariliz Gutterres
Summary: In this study, Mg-Al and Zn-Al layered double hydroxides were synthesized and utilized for phosphate removal. Experimental results indicated that the adsorbents showed good removal efficiency for phosphate, but were also influenced by the presence of other anions.
ENVIRONMENTAL TECHNOLOGY
(2021)
Article
Chemistry, Physical
Camila O. Calgaro, Ana Lucia Rocha, Oscar W. Perez-Lopez
REACTION KINETICS MECHANISMS AND CATALYSIS
(2020)
Article
Chemistry, Analytical
Paula Ligocki Graziottin, Morgana Rosset, Dirleia dos Santos Lima, Oscar W. Perez-Lopez
VIBRATIONAL SPECTROSCOPY
(2020)
Article
Chemistry, Physical
Camila O. Calgaro, Dirleia dos S. Lima, Rafaela Tonietto, Oscar W. Perez-Lopez
Summary: The La/Mg ratio was evaluated in Ni-Mg-La-Al catalysts for the biogas dry reforming, which showed that the catalyst with La/Mg = 4 exhibited the best activity and stability at 700 degrees C due to its greater resistance to sintering and a proper combination of acid and basic sites.
Article
Chemistry, Inorganic & Nuclear
Dirleia S. Lima, Oscar W. Perez-Lopez
INORGANIC CHEMISTRY COMMUNICATIONS
(2020)
Article
Chemistry, Applied
Morgana Rosset, Liliana Amaral Feris, Oscar W. Perez-Lopez
Summary: Ni-M-Al (M = K, Na, Li) LDH-derived catalysts were evaluated for biogas dry reforming, showing differences in acidity and sintering resistance among the catalysts. The NiLi catalyst exhibited higher resistance to sintering and deactivation mainly due to carbon deposition, while NiK and NiNa catalysts were mainly deactivated by sintering during reactions. Different carbon species were produced by the catalysts depending on the reaction conditions.
Article
Environmental Sciences
Nadini S. Carvalho Pinheiro, Oscar W. Perez-Lopez, Mariliz Gutterres
Summary: The study investigated the removal of anionic and cationic dyes from aqueous solutions using different types of leather shavings as adsorbents. Results showed that wet-blue leather shavings had a considerable removal efficiency for cationic dye, while wet-white leather and pickled hide shavings showed high efficiency in removing anionic dye. These findings suggest the promising use of leather shavings as alternative adsorbents for treating wastewater containing dyes.
ENVIRONMENTAL TECHNOLOGY
(2022)
Article
Engineering, Chemical
Dirleia S. Lima, Oscar W. Perez-Lopez
Summary: Mesoporous alumina was prepared by varying crystallization time and acid concentration, and evaluated in glycerol dehydration. The specific surface area, crystallinity, and acidic properties of the samples were dependent on both the crystallization time and acid concentration. The catalytic properties were related to the specific surface area and acidic characteristics, with conversions of glycerol above 92% obtained for all samples.
Article
Chemistry, Applied
Felipe Girondi Denardin, Andre Rodrigues Muniz, Oscar William Perez-Lopez
Summary: In this study, the interactions between Fe and Cu in Fe-Cu catalysts supported in ZSM-5 were investigated, revealing a promotive effect between Cu and Fe that increases H-2 consumption. Increasing Cu loading was found to enhance acid strength in the catalyst.
MICROPOROUS AND MESOPOROUS MATERIALS
(2021)
Article
Chemistry, Physical
Morgana Rosset, Liliana Amaral Feris, Oscar W. Perez-Lopez
Summary: Incorporating Mg or Zn into NiAl-LDH for reconstruction using a memory effect improved the catalytic activity and stability in the dry reforming of Biogas. The washing step significantly affected LDH reconstruction, with different metals influencing the properties of the materials. Ni-Zn alloy formation in Zn-reconstructed catalysts led to the best performance in methane and carbon dioxide conversion with a H-2/CO ratio of approximately 2.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Energy & Fuels
Dirleia dos Santos Lima, Oscar W. Perez-Lopez
Summary: Catalysts obtained from residual eggshells were prepared by calcination-hydration-calcination cycles under different conditions, affecting the specific surface area, crystallinity, and basicity of the materials. The production of light olefins from methane was observed under all samples, with the best results achieved for hydrated samples calcined under air flow. These differences in performance are attributed to the strength of basic sites and the presence of surface lattice oxygen.
Article
Chemistry, Physical
Wallace T. Figueiredo, Ravi Prakash, Clovis G. Vieira, Dirlleia S. Lima, Vagner E. Carvalho, Edmar A. Soares, Silvio Buchner, Hannes Raschke, Oscar W. Perez-Lopez, Daniel L. Baptista, Roland Hergenroder, Maximiliano Segala, Fabiano Bernardi
Summary: This study utilized NAP-XPS, UPS, and DFT calculations to investigate the electronic factor of the SMSI effect in Pd/TiO2 nanoparticles, revealing charge transfer from Pd nanoparticles to TiO2 support through Pd-O-Ti entities at the Pd-TiO2 interface during reduction treatment at 300 degrees C.
APPLIED SURFACE SCIENCE
(2022)
Article
Engineering, Environmental
Yan Resing Dias, Oscar W. Perez-Lopez
Summary: Mitigating CO2 emissions has become an important issue nowadays, and converting CO2 to CH4 as a natural gas substitute and H2 storage source is an interesting alternative. In this study, Ni/SiO2 catalysts promoted by Fe, Co and Zn were prepared and showed improved performance in CO2 conversion to methane, with Ni-Co/SiO2 achieving the best results in terms of CO2 conversion and CH4 selectivity.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Materials Science, Textiles
Renata Daiane Sulkovski, Mariliz Gutterres, Oscar William Perez-Lopez
JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS AND CHEMISTS
(2020)
Article
Chemistry, Physical
Dirleia dos Santos Lima, Yan Resing Dias, Oscar W. Perez-Lopez
SUSTAINABLE ENERGY & FUELS
(2020)
