Article
Engineering, Chemical
Juncong Zou, Yan Lin, Shaohua Wu, Mengjie Wu, Chunping Yang
Summary: The developed catalyst Mo/KIT-6-Ti shows excellent oxidative desulfurization performance, achieving efficient conversion of sulfides without the need for organic solvents, demonstrating great potential for practical fuel applications.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Xingye Zeng, Adeyemo Adesina, Ping Li, Hanlu Wang, Rujin Zhou
Summary: Ti-containing MWW zeolite was prepared and used as a catalyst and adsorbent in an adsorptive-oxidative desulfurization system. The system achieved high conversion rate of DBT and the oxidation products of DBT were removed by Ti-MWW adsorption. The study also investigated the influence of various parameters and the recycling and regeneration performance of Ti-MWW. This work provides valuable information for the construction of solvent-free oxidative desulfurization systems.
KOREAN JOURNAL OF CHEMICAL ENGINEERING
(2022)
Article
Engineering, Chemical
Si-Wen Li, Hai-Yan Zhang, Tian-Hao Han, Wen-Qi Wu, Wei Wang, Jian-She Zhao
Summary: A new type of FeMP catalyst with spinosus structure and sharp surface has been developed, with FeCrP showing higher desulfurization performance, maintaining high catalytic activity even after multiple uses, demonstrating good value in actual industrial applications.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Chemistry, Inorganic & Nuclear
Maxim L. Kuznetsov, Armando J. L. Pombeiro
Summary: In contrast to V(v) complexes with various organic ligands, a simple vanadate without any additive is inactive in neutral medium toward the oxidation of alkanes with H2O2. In this work, we discovered that the insufficient activation of H2O2 upon coordination to the simple vanadate - the commonly accepted reason for the low catalytic activity of the vanadate - cannot explain this phenomenon.
DALTON TRANSACTIONS
(2023)
Article
Chemistry, Multidisciplinary
Hanieh Fakhri, Ali Esrafili, Mahdi Farzadkia, Rabah Boukherroub, Varsha Srivastava, Mika Sillanpaa
Summary: This study introduced an effective visible-light induced photocatalytic system for photocatalytic oxidative desulfurization and denitrogenation using molecular oxygen as an oxidant. The composite of tungestophosphoric acid supported onto cerium-doped NH2-UiO-66 showed superior photocatalytic ability under visible light irradiation.
NEW JOURNAL OF CHEMISTRY
(2021)
Article
Chemistry, Physical
Jan Droenner, Karim Bijerch, Peter Hausoul, Regina Palkovits, Matthias Eisenacher
Summary: Hydroxybenzene, also known as phenol, is a crucial organic commodity chemical, and the cumene process is widely used for its production. The Hock rearrangement is a vital step in this process, and the use of high-temperature-treated Linde Type X (LTX) zeolites as catalysts in the peroxide cleavage step showed promising results, making it a potential alternative to sulfuric acid for this reaction.
Article
Engineering, Chemical
Mahboubeh Naghavi, Golshan Mazloom, Azam Akbari, Farhad Banisharif
Summary: A new efficient and environmentally friendly approach using ferrate (Fe (VI)) and SO42-/gamma-Al2O3 solid super-acid catalyst was proposed for deep oxidative desulfurization in this work. The SO42-/gamma-Al2O3 catalysts were found to significantly enhance the performance of ferrate as an oxidant due to their acidic sites.
CHEMICAL ENGINEERING RESEARCH & DESIGN
(2021)
Article
Chemistry, Physical
Fatemeh Koohestani, Samahe Sadjadi
Summary: A new strategy is proposed to enhance the catalytic activity of cross-linked chitosan beads by functionalizing them with vinyl and polymerizing them with 1-vinyl-3-butylimidazolium bromide to create a polyionic liquid on the beads. The resulting composite serves as a metal-free catalyst for various organic transformations with high efficiency and recyclability. Comparative studies show that the activity of this composite is superior to that of cross-linked bead and polyionic liquid.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Chemistry, Physical
Mahboube Ghahramaninezhad, Ali Ahmadpour
Summary: This article introduces a convenient and safe method to combine TiO2/SiO2 nanohybrids with beta-cyclodextrin (beta-CD) for synthesizing an advanced catalyst named TS-4/CM-beta-CD. The activity performance of the catalyst in oxidative desulfurization (ODS) of dibenzothiophene (DBT) is studied, and the structural and morphological properties of the catalyst are identified. The optimal conditions for ODS are determined to achieve a high sulfur removal rate. The important role of beta-CD rings in DBT trapping during the oxidation reaction is also investigated. This work presents a simple approach to synthesize an efficient and recoverable catalyst using environmentally friendly and economical materials, particularly beta-CD, as a safe modifier agent.
SURFACES AND INTERFACES
(2022)
Article
Chemistry, Physical
Guojun Shi, Jiahe Shan, Zhenliang Zhao, Qiuting Lu, Enxian Yuan
Summary: In this study, didodecyl dimethyl ammonium bromide (DDAB) was found to have a significant promotion effect on the aerobic oxidation of cumene to cumyl hydroperoxide (CHP) at near room temperature. The promotion was attributed to the formation of reversed multilamellar vesicles (MLVs) as micro-reactors.
MOLECULAR CATALYSIS
(2023)
Article
Energy & Fuels
Moslem Ahmadian, Mansoor Anbia
Summary: In this study, mesoporous silica SBA-15 and MOR-SBA-15 supported catalysts were successfully fabricated and characterized. The catalytic performance of the synthesized catalysts for oxidative desulfurization was investigated, and the factors affecting the desulfurization process were evaluated. The results showed that the Cu/MOR-SBA-15 catalyst exhibited excellent desulfurization activity and reusability.
Article
Engineering, Environmental
Mitra Jafarinasab, Azam Akbari
Summary: A novel HPMo@Co-ZIF-67 composite catalyst was successfully synthesized for the efficient removal of DBTs from fuels, achieving a high ODS efficiency of 98%. The catalyst showed a stable structure with only 5% performance loss after five cycles of use, and no significant HPMo leaching was detected during the ODS treatment.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Engineering, Chemical
Muhammad Yaseen, Sahira Khattak, Sana Ullah, Fazle Subhan, Waqas Ahmad, Muhammad Shakir, Zhangfa Tong
Summary: Sulfur compounds in transportation fuels cause serious environmental pollution when burned. This study presents the catalytic oxidative desulfurization (ODS) of model and real petroleum distillates using sodium hypochlorite (NaClO) as oxidant over Cu and Ni loaded activated carbon (AC) derived from banana peels. The Ni/AC-NaClO catalyst-oxidant system showed high catalytic activity and stability for sulfur removal, outperforming some state-of-the-art catalysts reported. The presence of super-strong oxidizing species of hypochlorite (OCl-) generated from NaClO dissociation over the catalyst surface contributed to the excellent performance.
CHEMICAL ENGINEERING RESEARCH & DESIGN
(2022)
Article
Energy & Fuels
Juan Li, Xiaolei Jiang, Mingyuan Zhu, Bin Dai
Summary: Oxidative desulfurization (ODS) is a promising technique for clean fuel production. This study successfully synthesized Cu(I)-MOF-808 and confirmed the presence of Lewis acid sites. The Cu(I)-MOF-808 showed excellent performance in the ODS reaction, achieving a high conversion rate of dibenzothiophene to dibenzothiophene sulfone. The catalyst also demonstrated good stability after multiple recycling.
Article
Chemistry, Organic
Kang Dong, Jia Li, Rui-Peng Li, Mingming Mao, Jian Liu, Xiaolei Wang, Shouchu Tang
Summary: A simple and efficient method for synthesizing structurally diverse symmetrical and unsymmetrical 3,3'- and 2,3'-bisindolylmethanes has been developed using a one-pot sequential reaction with 1,3-dithiane as the methylene source. The important AhR agonists ICZ and malassezin were successfully synthesized with excellent efficiency using this straightforward approach.
JOURNAL OF ORGANIC CHEMISTRY
(2022)