Article
Chemistry, Physical
Lijing Yang, Congmin Fan, Jiapeng Zhang, Fengming Zhang, Ran Li, Shuang Yi, Yue Sun, Hua Dong
Summary: A SiO2@PAA catalyst composed of silica nanoparticles modified with poly(acrylic acid) was developed for NaBH4 methanolysis, showing excellent catalytic performance. The catalyst exhibited significantly higher hydrogen generation rate and lower activation energy compared to unmodified silica. Furthermore, the catalytic activity of the SiO2@PAA catalyst could be restored after regeneration with diluted hydrochloric acid solution.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Sahin Demirci, S. Duygu Sutekin, Olgun Guven, Nurettin Sahiner
Summary: Poly(2-aminoethyl methacrylate) (p(AEM)) microgels were synthesized and used for metal nanoparticle preparation. These microgels were then incorporated into p(AEM) based poly ionic liquid (PIL) microgels, which served as catalysts for hydrogen production from sodium borohydride (NaBH4) reactions. The catalytic activity and regeneration ability of the microgels were analyzed, showing promising results.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Green & Sustainable Science & Technology
Adeyinka S. Yusuff, Aman K. Bhonsle, Dinesh P. Bangwal, Neeraj Atray
Summary: A highly efficient barium-modified zeolite (Ba-ZEL) catalyst was developed through optimizing thermal treatment temperature, biodiesel production process conditions, and catalyst performance, leading to the maximum biodiesel yield meeting the standard requirements under the optimum conditions.
Article
Chemistry, Physical
Cafer Saka
Summary: In this study, activated carbons prepared from microalgae with KOH activation were used for the first time as sulphur (S) and phosphorus (P) doped metal-free carbon catalysts in NaBH4 methanolysis reaction, showing a high hydrogen generation rate and low activation energy. After five cycles, the catalyst retained 59% of its initial catalytic activity, demonstrating the potential for environmentally friendly efficient catalytic reactions.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Chemistry, Physical
Cafer Saka, Asim Balbay
Summary: Metal-free catalysts were produced from apricot kernel shells for efficient H-2 generation from NaBH4 methanolysis. The catalysts were activated through a two-step process and characterized for their structure and properties. The results showed that the metal-free catalyst exhibited a high hydrogen production rate and low activation energy.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Medhen W. Abebe, Anteneh F. Baye, Hern Kim
Summary: In this study, an interpenetrating polymer network (IPN) strategy was utilized to prepare a recyclable polymeric catalyst for catalytic methanolysis of NaBH4 to produce hydrogen gas. The catalyst exhibited excellent cyclic performance and prolonged catalyst life.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Energy & Fuels
Cafer Saka
Summary: Metal-free carbon catalysts doped with sulfur and phosphorus were prepared from activated carbon obtained from microalgae, showing high hydrogen generation rate and low activation energy in NaBH4 methanolysis. The catalytic activity was attributed to the synergistic effects of porous structure and P- and S-containing active sites, providing a new strategy for environmentally friendly efficient catalytic reactions.
Article
Chemistry, Physical
Duygu Elma Karakas
Summary: In this study, orange peel was used as a metal-free catalyst for hydrogen production from sodium boron hydride. The catalyst was prepared by treating the orange peel with phosphoric acid and burning it at a specific temperature and time. The catalytic activity of the catalyst was characterized and the hydrogen generation rates and activation energy were determined.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Xiaofa Su, Sifang Li
Summary: A new type of PVP-stabilized bimetallic Co-Ni nanoparticles as catalyst for hydrogen production from methanolysis of ammonia borane showed good catalytic performance, magnetic recyclability, and synergistic effect between Co and Ni.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Engineering, Environmental
Tuba Ersen Dudu, Esra Ozer Seker
Summary: Metal-free polymeric catalysts for H-2 production from NaBH4 hydrolysis were synthesized from Oxalic acid by redox polymerization technique in a surfactant-free emulsion medium. The structural and physicochemical properties of these polymeric catalysts were investigated. The effects of parameters such as reaction temperature, amount of polymeric particle, and NaBH4 concentration on H-2 gas production were examined. Results showed that the oxalic acid-based catalysts followed first-order kinetics and exhibited promising hydrogen production rates.
JOURNAL OF POLYMERS AND THE ENVIRONMENT
(2023)
Article
Engineering, Environmental
Shixiong Tang, Fang Li, Jidong Liu, Bao Guo, Zenan Tian, Jianhua Lv
Summary: The treatment and reuse of polyester wastes have attracted widespread attention. This study proposed a convenient and feasible method to solve the plastic recycling crisis by using MgO/NaY catalysts with different MgO contents in the methanolysis of PET. The results showed that the catalyst had excellent catalytic activity, achieving high conversion of PET and yield of DMT under specific reaction conditions. Furthermore, the catalyst exhibited good recyclability after multiple cycles.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Chemistry, Physical
Jinlin Song, Ran Li, Hua Dong
Summary: The addition of cheap and environment-friendly acetic acid (CH3COOH) into NaBH4 solutions stabilized with NaOH can significantly accelerate the hydrolysis reaction and control the start/stop of the reaction by adding acid or base into the solution, enabling on-site hydrogen production. This finding is of great significance for efficient and convenient hydrogen production.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Energy & Fuels
Erk Inger, Sahin Demirci, Mehmet Can, Aydin K. Sunol, George Philippidis, Nurettin Sahiner
Summary: Experimental results demonstrate that treated T and P sand samples show higher capability in catalyzing hydrogen generation, with a more significant effect observed after PEI modification.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Engineering, Environmental
Duygu Alpaslan, Tuba Ersen Dudu, Nahit Aktas
Summary: The fast generation of hydrogen through the methanolysis of NaBH4 was achieved using metal-free catalysts synthesized from natural and environmentally friendly materials. The polymeric GO particles with suitable hydrodynamic diameters and zeta potential demonstrated efficient catalytic performance under various conditions. The study revealed the kinetic properties of the methanolysis reaction and successfully transformed GO into a product with high energy value.
JOURNAL OF POLYMERS AND THE ENVIRONMENT
(2023)
Article
Green & Sustainable Science & Technology
Mai O. Abdelmigeed, Eslam G. Al-Sakkari, Mahmoud S. Hefney, Fatma M. Ismail, Tamer S. Ahmed, Ibrahim M. Ismail
Summary: This study investigated the methanolysis reaction to increase biodiesel yield using the NaOH/magnetized ZIF-8 catalyst, finding the optimal methanol to oil ratio and catalyst dose. The produced esters were confirmed to be usable as sustainable biodiesel fuel.