Article
Green & Sustainable Science & Technology
Payal Dalvi, Ananya Dey, Parag R. Gogate
Summary: In this study, a N-doped TiO2 catalyst was synthesized using ultrasound-assisted method and applied for catalytic desulfurization. Compared to the conventionally synthesized catalyst, the sonochemically synthesized catalyst showed better performance in terms of particle size, homogeneity, and activity. Under the optimal conditions, the sonochemically synthesized catalyst had a smaller particle size compared to the conventionally synthesized catalyst. The desulfurization experiment also demonstrated a higher desulfurization rate for the sonochemically synthesized catalyst.
Review
Acoustics
Ali Tugrul Albayrak, Aydin Tavman
Summary: Environmental pollution caused by petroleum-based fuels used in vehicles has been increasing recently. This pollution is mainly due to the emission of acidic SO2 gas during fuel combustion, which not only causes acid rain but also corrodes engine parts and catalytic converters. To reduce sulfur content, strict regulations have been introduced, but the decreasing oil reserves and the increasing low-quality oils have made desulfurization difficult and costly. Ultrasound wave has been suggested as an alternative method to enhance desulfurization in a shorter time. This review summarizes the advantages and challenges of oxidative desulfurization, evaluates the economics of ultrasound-assisted oxidative desulfurization, and provides recommendations for process improvement.
ULTRASONICS SONOCHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Linghao Li, Wei Wang, Jian Huang, Rongmin Dun, Bowen Lu, Yiwei Liu, Jingxian Wu, Siyu Yang, Zile Hua
Summary: Based on additional freeze-drying of gel precursors and routine steam assisted crystallization (SAC) treatment, submicrometer-sized hierarchical TS-1 aggregates, named as aggTS-1, were synthesized and showed high crystallinity, abundant stacked mesopores, and preferential surface distribution of active titanium sites. These aggTS-1 materials exhibited easy isolation, high activity, and recyclability in catalytic oxidative desulfurization reactions of fuel oils. Moreover, the study confirmed the critical effect of water concentration on the particle morphology and formation process of nanozeolite aggregates.
Article
Energy & Fuels
Jiyuan Fan, Aiping Chen, Saumitra Saxena, Sundaramurthy Vedachalam, Ajay K. Dalai, Wen Zhang, Abdul Hamid Emwas, William L. Roberts
Summary: The study found that Mo/Ti-TUD-1 catalyst showed good oxidative desulfurization (ODS) performance for model oil under both mechanical stirring and ultrasound conditions, with ultrasound assistance significantly shortening the reaction time. The oxidative reactivity of sulfur compounds in the model oil followed the same order under mechanical stirring and ultrasound: 4,6-DMDBT > DBT > BT.
Article
Engineering, Chemical
Chongfu Wu, Changsheng Chen, Zhaoyang Qi, Jie Chen, Qinglian Wang, Changshen Ye, Ting Qiu
Summary: The ultra-deep desulfurization of oil is an urgent task due to various problems such as environmental pollution and environmental protection requirements. Oxidative desulfurization (ODS) is considered the most promising technology, but the synthesis of highly efficient and stable HPW-based heterogeneous catalysts remains challenging. In this paper, a simple one-step method was used to prepare a PEHA-HPW heterogeneous catalyst for ultra-deep desulfurization of fuel oil. The composite material showed excellent catalytic activity and high recyclability.
CHINESE JOURNAL OF CHEMICAL ENGINEERING
(2023)
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)
Article
Multidisciplinary Sciences
Mohadeseh Farahani, Mehdi Mousavi-Kamazani, Zohreh Salarvand
Summary: Ce0.5Bi0.5VO4/rGO nanocomposite was synthesized using the sonochemical method to improve the desulfurization efficiency of petroleum derivatives. The nanocomposite showed an amorphous structure and smaller particle size distribution under optimal synthesis conditions. The presence of reduced graphene oxide (rGO) in the nanocomposite enhanced photocatalytic efficiency by improving charge separation. The addition of hydrochloric acid and hydrogen peroxide further increased the desulfurization efficiency.
SCIENTIFIC REPORTS
(2023)
Article
Engineering, Chemical
Ziyang Zheng, Qian Wu, Shengyang Zhong
Summary: Polyacrylamide (PAM) was used for the first time in loading heteropoly acids, and the HPM/PAM-n catalyst was successfully synthesized. The effects of HPM/PAM-n on desulfurization were investigated, and the optimal desulfurization efficiency was achieved. The optimal conditions for HPM/PAM-10000 desulfurization were determined, and the catalyst showed high desulfurization efficiency even after 10 cycles. The oxidative desulfurization mechanism was proposed.
Article
Environmental Sciences
Komal Desai, Swapnil Dharaskar, Jalaja Pandya, Satyam Shinde, Thummalapalli Gupta
Summary: Phosphonium-based ionic liquid (PIL) has been utilized as a catalyst and extractant for the sulfur removal of model oil (MO) in this study. The PIL acts as a reaction-induced self-separation catalyst. The optimal conditions for the ultrasound-assisted extractive/oxidative desulfurization (UEODS) catalyzed by PIL were investigated, and a kinetic study was performed. The results showed that PIL exhibited stability in DBT removal with various initial S-content, indicating its potential for practical applications.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Environmental Sciences
Lemeng Wang, Zhikai Zhao, Wen Wang, Gaoshan Xing, Fang Zeng, Liqiang Qi
Summary: In this study, a novel catalyst V-Cu-Ce-ZSM-5 was explored for simultaneous removal of SO2 and NOx from flue gas, with the addition of graphene oxide (GO) to further enhance its catalytic activity. The results showed that V-Cu-Ce-ZSM-5@GO0.5 exhibited the best performance for SO2 and NOx oxidation at a low temperature of 150 degrees C.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Engineering, Chemical
Mohammad Ali Rezvani, Nahid Jafari
Summary: A new FeW/MgO/CS hybrid nanocomposite was synthesized and utilized as a heterogeneous catalyst in catalytic oxidative desulfurization reactions, achieving up to 95% oxidation efficiency for both model liquid fuels and gasoline under mild conditions. The nanocomposite demonstrated excellent sulfur removal properties and reusability, showing potential for the production of clean transportation fuels.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2021)
Article
Energy & Fuels
Tianqing Zhou, Shaoze Wang, Chaojian Zhang, Yue Yao, Yanyan Chen, Shuxiang Lu, Xiaoyuan Liao
Summary: Improving catalysts' desulfurization capacity is crucial for environmental protection. NH2-MIL-125 material, a MOF material with good adsorption properties, was prepared using a hydrothermal method. The dried materials at different temperatures were analyzed using XRD, FT-IR, SEM, and physical adsorption. Experiment results showed that NH2-MIL-125@150 degrees C had the highest desulfurization capacity, followed by NH2-MIL-125@200 degrees C and NH2-MIL-125@250 degrees C, while NH2-MIL-125@110 degrees C had the lowest capacity.
Article
Acoustics
Ekaterina Kholkina, Narendra Kumar, Kari Eranen, Markus Peurla, Heikki Palonen, Jarno Salonen, Juha Lehtonen, Dmitry Yu Murzin
Summary: The study focused on waste minimization strategy in synthesis of catalysts from desulfurization slag, resulting in highly crystalline catalysts with improved catalytic activity. Ultrasonication as an additional synthesis step enhanced the crystallization of new phases, leading to increased catalytic performance in basic reactions. Different treating agents and ultrasound pretreatment played important roles in achieving high selectivity and activity for desired product.
ULTRASONICS SONOCHEMISTRY
(2021)
Article
Engineering, Chemical
Jiyuan Fan, Hassnain Abbas Khan, Tairan Wang, Javier Ruiz-Martinez, Saumitra Saxena, Abdul-Hamid Emwas, Vasileios G. Samaras, William L. Roberts
Summary: The PMoA/G5 catalyst was synthesized and its oxidative desulfurization (ODS) performance on model oil was studied. The catalyst was used in the ODS of Arabian Extra light oil (AXL) through an oxidation-extraction-adsorption system. The FT-ICR MS and NMR analysis provided detailed insights into the distribution and selectivity of sulfones extracted using different extractants. The results demonstrated the excellent performance of the PMoA/G5 catalyst and provided guidelines for ODS technology.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Mahendran Manivannan, Venkatachalam Rajagopal, Lalithambigai Krishnamoorthy, Selvam Dhanasurya, Vembu Suryanarayanan, Murugavel Kathiresan, Thasan Raju, Lathe A. Jones
Summary: Metal-organic frameworks (MOFs) have emerged as promising electrocatalysts due to their large specific surface area, high porosity, changeable pore size, and ordered pore arrangement. In this study, trimetallic MOFs (Co-Ni-Al-MOFs) and bimetallic MOFs (Co-Ni-MOFs, Co-Al-MOFs, and Ni-Al-MOFs) were synthesized and characterized for their surface morphology, functional group and elemental analysis. Co-Ni-Al-MOFs exhibited excellent catalytic activity for thiophene electrooxidation, water splitting, and chemical reduction of 4-nitrophenol (4-NP), attributed to their larger surface area and higher pore volume compared to other bimetallic MOFs. The catalytic activity of Co-Ni-Al-MOFs was further evaluated for the reduction of 4-NP to 4-aminophenol (4-AP), showing exceptional activity with a minimum reduction time of 8 min.
NEW JOURNAL OF CHEMISTRY
(2023)