Article
Energy & Fuels
Ze Fang, Zhiguo Zhao, Nan Li, Zhexin Zhu, Wangyang Lu, Fengtao Chen, Wenxing Chen
Summary: An environmentally friendly desulfurization technology was developed using a biomimetic catalytic system, ethanol and water solvent, achieving a high removal rate of dibenzothiophene. The research provides a new idea for the design of efficient, energy-saving, and environmentally friendly desulfurization systems.
Article
Engineering, Chemical
Marzieh Shams Harandi, Esmaeil Shams, Ensiyeh Sharifi, Fariborz Momenbeik
Summary: An extraction-electrooxidation system was introduced for the removal of dibenzothiophene from model fuel, achieving 100% removal efficiency. The method utilizes a polar solvent and electrochemical medium, demonstrating feasibility and innovation for deep desulfurization of liquid fossil fuels.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Energy & Fuels
Fina J. Lesafi, Tatiana Pogrebnaya, Cecil K. King'ondu
Summary: A novel SnO2-MoO3 catalyst was synthesized for oxidative desulfurization of fuel, showing excellent catalytic activity and reusability.
Article
Engineering, Chemical
Yadollah Tavan, Fatola Farhadi, Mohammad Shahrokhi
Summary: The study utilized electrochemical oxidative desulfurization technique to reduce the sulfur content of crude diesel, with kinetic study showing a second order reaction rate. Dimethyl sulfoxide was selected as the solvent for desulfurization extraction, with research indicating that low solvent flow rate can improve extraction efficiency.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Energy & Fuels
Hang Xu, Jun Zhang, Dandan Zhang, Yafei Guo, Fengmin Wu
Summary: The silica gel supported ionic liquid ([Bmim]CoCl3) catalyst, prepared using a sol-gel method and coupled with [Bmim]BF4 and oxone, showed high desulfurization efficiency. The catalyst exhibited good recyclability and effective desulfurization performance on three sulfur-containing substances with high sulfur content. The desulfurization mechanism was speculated based on the GC-MS results.
Article
Energy & Fuels
Xiaoyu Zhou, Hang Liu, Sixiao Liu, Lei Zhang, Tianyi Wang, Chengyin Wang, Dawei Su
Summary: By using the α-Fe2O3/g-C3N4/HNTs composite material, efficient photocatalytic desulfurization of dibenzothiophene in model oil under visible light can be achieved. The unique structure of the composite material promotes the transfer and separation of photogenerated carriers, thereby enhancing the efficiency of photocatalytic reactions.
Article
Chemistry, Physical
Yue Liu, Jing-zhi Tian, Yong-jie Zheng, He-shan Zheng, Shuo Li, Tao Jing, Hong-rui Zhang, Jing-ying Shao
Summary: A core-shell porous catalyst coated with TiO2-fibrous silica (KCC-1) was prepared and showed excellent catalytic desulfurization performance. The unit desulfurization rate was significantly improved without additional oxidants. The adsorption-catalysis-resorption desulfurization system was effective, enhancing the reaction rate and achieving selective adsorption and coupling desulfurization. Furthermore, the spent catalyst could be regenerated without a decrease in desulfurization rate.
SURFACES AND INTERFACES
(2022)
Article
Chemistry, Physical
Jingwen Li, Yanwen Guo, Junjun Tan, Bing Hu
Summary: A novel family of imidazole-based polyoxometalate dicationic ionic liquids catalysts were synthesized for efficient desulfurization of fuel oil, showing excellent desulfurization efficiency and recyclability. The possible mechanism of the ECODS process was proposed based on the catalytic performance under different conditions.
Article
Chemistry, Physical
Armin Raeisi, Alireza Najafi Chermahini, Marzieh Esmaeilzadeh Khabazi, Mohamad Mohsen Momeni, Rafael Luque, Antonio Pineda, Enrique Rodriguez Castellon, Carolina Vargas Fernandez
Summary: This investigation successfully removes sulfur-based compounds by a combination of absorptive and oxidative desulfurization processes using a series of novel Bi-based bifunctional photo electrocatalysts. The results showed that the catalysts had higher efficiency in absorptive desulfurization and better results in oxidative desulfurization. Among the catalysts, photoelectrocatalytic desulfurization performed best in dibenzothiophene removal.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Engineering, Chemical
Jiaxin Tian, Zifei Yan, Jian Deng, Guangsheng Luo
Summary: A novel homogeneous oxidation method utilizing hydrogen peroxide catalyzed by phosphotungstic acid has been developed for the synthesis of high-quality 2,2'-dibenzothiazole disulfide (MBTS). This method improves reaction efficiency and product quality, solves organic wastewater treatment issues, achieves high purity product synthesis, and successfully recycles the mother liquor containing catalyst.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2022)
Article
Engineering, Environmental
Fariba Mohammadi Nejati, Shahrokh Shahhosseini, Mehran Rezaee
Summary: Researchers developed a sandwich-type polyoxometalate catalyst immobilized on magnetic graphene oxide, which showed high efficiency in removing sulfur compounds under suitable conditions. The catalyst also demonstrated good reusability.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Chemistry, Multidisciplinary
Suting Xie, Xinyu Zhao, Dongxiao Wang, Huawei Yang, Lixia Yang, Liangjiu Bai, Donglei Wei, Wenxiang Wang, Ying Liang, Hou Chen, Shaojun Guo
Summary: Photocatalytic aerobic oxidation desulfurization (PAODS) is a sustainable alternative for desulfurization, but current photocatalysts have limitations in generating reactive oxygen species and sulfide oxidation rate. Researchers have developed a MoOx nanocluster decorated Mo-doped TiO2 catalyst that efficiently promotes the photocatalytic oxidation of sulfides, achieving a record oxidation activity.
SCIENCE CHINA-CHEMISTRY
(2023)
Article
Chemistry, Applied
Chao Wang, Wei Jiang, Hanxiang Chen, Linhua Zhu, Jing Luo, Wenshu Yang, Guangying Chen, Zhigang Chen, Wenshuai Zhu, Huaming Li
Summary: In this study, Pt nanoparticles with sizes around 4-5 nm were effectively encapsulated on vanadium pentoxide nanosheets, resulting in a catalyst with excellent catalytic aerobic oxidation performance for deep desulfurization. The catalysts were able to be reused at least seven times, showing great potential for practical applications.
CHINESE JOURNAL OF CATALYSIS
(2021)
Article
Chemistry, Physical
Ekaterina Eseva, Argam Akopyan, Anna Schepina, Aleksandr Anisimov, Anton Maximov
Summary: Anderson-type polyoxometalate (POM) catalysts were synthesized and applied for deep oxidative desulfurization of model fuel containing dibenzothiophene. The role of solvent in aerobic oxidative desulfurization was investigated, showing that alkyl peroxides from the solvent could be the key stage in the oxidation of sulfur-containing compound. This study provides insights into the mechanism of oxidative desulfurization and the potential application of POM catalysts in sulfur removal from fuel.
CATALYSIS COMMUNICATIONS
(2021)
Article
Nanoscience & Nanotechnology
Yu Liu, Jiabao Bai, Ya Song, Huawei Yang, Lixia Yang, Liangjiu Bai, Donglei Wei, Wenxiang Wang, Xinxiang Cao, Ying Liang, Hou Chen
Summary: Iron-intercalated molybdenum oxides nanobelts have been reported as a durable and robust catalyst for aerobic oxidative desulfurization, catalyzing the reaction efficiently at 80 degrees C by precisely modulating the electronic structure to increase surface oxygen vacancy density. The optimized doping amount enables the catalyst with excellent catalytic performance through thorough conversion of various sulfides, making it a candidate for sustainable fuel desulfurization. The strategy demonstrated here provides practical guidance for the rational design and optimization of Mo-based catalysts to promote aerobic oxidation reactions.
ACS APPLIED NANO MATERIALS
(2021)
Article
Environmental Sciences
P. R. Potti, V. C. Srivastava, P. Kumar, S. Das, N. Kumar, U. L. Stangar
Summary: This study synthesized Sn-doped ZnO photocatalysts using the solution combustion synthesis method and investigated the effects of different experimental parameters on the properties and degradation efficiency. The results showed that BET surface area and bandgap energy are the key factors influencing the degradation of dyes by Sn-doped ZnO.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2023)
Article
Engineering, Chemical
Nilambar Bariha, Deepak Kumar Ojha, Vimal Chandra Srivastava, Indra Mani Mishra
Summary: This article focuses on the analysis of risks associated with gas transfer operations in an LPG bottling plant in India. Due to urban expansion, these plants are now surrounded by residential and business areas. The frequency of transfer operations has also increased in order to maintain the supply chain. Accidental release of LPG during these operations can have severe consequences such as fire and explosions. The study classifies and analyzes the operations in various hazard zones and models the probability and consequences of accidents using tools like ALOHA and PHAST. The estimated thermal radiation can cause damage to nearby population and plant machinery.
JOURNAL OF LOSS PREVENTION IN THE PROCESS INDUSTRIES
(2023)
Article
Chemistry, Multidisciplinary
Ananda Jaysing Jadhav, Vimal Chandra Srivastava
Summary: In spectrophotometry, it is challenging to determine the concentration of chemical constituents in mixtures due to spectral interferences and close lambda max wavelengths. This paper presents a model based on a genetic algorithm and partial least squares to estimate the concentrations of components in ternary synthetic mixtures. The model was verified using different mixtures, and the results showed improved accuracy with the genetic algorithm.
JOURNAL OF THE INDIAN CHEMICAL SOCIETY
(2023)
Article
Polymer Science
Anuj Rawat, Raeesh Muhammad, Vimal Chandra Srivastava, Paritosh Mohanty
Summary: The hypercrosslinking of benzene using formaldehyde dimethyl acetal as the crosslinker, anhydrous ferric chloride as the catalyst, and 1,2 dichloroethane as the solvent for the synthesis of poly-benz is reported. Microwave-assisted synthesis resulted in the formation of nanoporous poly-benz with a specific surface area of 1168 m2 g-1 within 60 minutes. Thorough analysis using NMR and XPS revealed the hypercrosslinking at the meta position of the benzene ring. The synthesized poly-benz showed a high CO2 capture capacity of 65.3 wt % at 298 K and 30 bar, and different adsorption isotherm models were fitted to represent the equilibrium CO2 adsorption data at various temperatures.
Article
Chemistry, Physical
Kavisha Dang, Navneet Kumar, Vimal Chandra Srivastava, Jinsub Park, Mu. Naushad
Summary: A series of CaO-MgO catalysts were prepared using different precipitating agents and Mg/Ca ratios. The physiochemical characteristics of the catalysts were analyzed using various techniques. The catalysts were tested for propylene carbonate synthesis and the effects of composition, dose, temperature, and contact time were investigated. The best catalyst achieved a high PC yield with good selectivity and reusability, showing potential for the synthesis of organic carbonates.
Article
Green & Sustainable Science & Technology
Mohammad Nasir, Praveen Kumar, Vimal Chandra Srivastava, Shilpi Verma, Ramanpreet Kaur, Indra Deo Mall, Urska Lavrencic Stangar
Summary: The adsorptive removal of 4-CBA using bagasse fly ash (BFA) was studied and compared with granular activated carbon (GAC). The optimum treatment conditions for BFA were found to be pH = 4, m = 9 g/L, Co = 100 mg/L, and t = 7.5 h, with a removal efficiency of 79% and adsorption uptake of 9.9 mg/g. BFA was determined to be a cost-effective adsorbent with high adsorption capacity and fast kinetics.
CLEAN TECHNOLOGIES AND ENVIRONMENTAL POLICY
(2023)
Editorial Material
Energy & Fuels
Vimal Chandra Srivastava, Hari Prakash Veluswamy, Deepak Kumar Ojha
Article
Green & Sustainable Science & Technology
Tanveer Rasool, Vimal Chandra Srivastava, Pratik Toshniwal, Ishfaq Najar, Vikash Singh
Summary: This study evaluated the kinetic and thermodynamic parameters of co-pyrolysis of wood pellets and petroleum coke blends. It was found that the reaction order increases with increasing heating rate, and the average activation energy was calculated to be 119.6 kJ mol-1 (OFW) and 126.2 kJ mol-1 (KAS). The values for ΔH, ΔG, and ΔS were consistent with previous studies, and ΔG was observed to be around 182 kJ mol-1. The study also identified the mechanisms of diffusion and chemical reaction during the thermal degradation process.
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(2023)
Article
Materials Science, Multidisciplinary
Seema Singh, Ritesh Patidar, Vimal Chandra Srivastava, Praveen Kumar, Ajay Singh, Shang-Lien Lo
Summary: In this study, ellipsoid-shaped cupric oxide (CuO) nanoparticles were synthesized using a simple hydrothermal method and subsequent heat treatment. The catalysts showed excellent peroxymonosulfate (PMS) activation ability for the degradation of perfluorooctanoic acid (PFOA). Various operating parameters were investigated, and it was found that singlet oxygen (1O2) played a key role in the oxidative-reductive mechanism of PFOA degradation. Additionally, a two-step pseudo-first-order kinetic model was proposed and minimal metal leaching was observed after repeated use.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Green & Sustainable Science & Technology
Vikash Singh, Seon Yeong Park, Eun Seo Lee, Jun Ho Choi, Chang Gyun Kim, Vimal Chandra Srivastava
Summary: The co-combustion characteristics and synergy of distillery effluent sludge (DES) and sugar mill waste (SMW) were studied by thermogravimetric analysis. The blend of 25% DES and 75% SMW exhibited optimal combustion parameters and the presence of Fe, Ca, and Mg in DES facilitated effective combustion. The ash from the combustion process can be considered as a possible supplementary cementing material.
ENVIRONMENT DEVELOPMENT AND SUSTAINABILITY
(2023)
Article
Engineering, Environmental
Seema Singh, Praveen Kumar, Ritesh Patidar, Vimal Chandra Srivastava, Shang-Lien Lo, Urska Lavrencic Stangar
Summary: In this study, Co3O4 nanospheres with excellent surface properties were synthesized and used for the degradation of BPA. The nano-Co3O4/PMS system effectively degraded BPA (approximately 92%) at neutral pH with low cobalt leaching and good recyclability. Chemical quenching studies confirmed the involvement of hydroxyl radicals and sulfate radicals in BPA oxidation.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Environmental Sciences
Seema Singh, Ritesh Patidar, Vimal Chandra Srivastava, Qicheng Qiao, Praveen Kumar, Ajay Singh, Shang-Lien Lo
Summary: This study synthesized low-toxicity and eco-friendly spherically shaped manganese oxides (alpha-MnO2, Mn2O3, and Mn3O4) using the chemical precipitation method. The variable oxidation states and diverse structures of manganese-based materials have a strong impact on electron transfer reactions. The as-prepared manganese oxides (MnOx) exhibited excellent catalytic activity for the degradation of rhodamine B (RhB) organic pollutant in the presence of peroxymonosulfate (PMS) under acidic conditions. The different oxidation states of MnOx promote oxidative-reductive reactions and the higher surface area provides ample absorption sites for pollutant interactions.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Chemistry, Multidisciplinary
Pankaj Kumar, Vimal Chandra Srivastava
Summary: The size-dependent activity of catalysts has been investigated in catalysis for a long time. Positively charged small Pt clusters exhibit higher catalytic activity compared to larger clusters and bulk for propane dehydrogenation. Computational studies were performed on small Pt clusters adsorbed on silica support, revealing their planar structures and the formation of directional bonds with the support. Ethane and propane molecules undergo dehydrogenation reactions with different activation energies depending on the size of the Pt clusters and the mechanism followed.
Review
Engineering, Environmental
Seema Singh, Ritesh Patidar, Vimal Chandra Srivastava, Shang-Lien Lo, P. V. Nidheesh
Summary: This review presents the recent advancements in the electrochemical oxidation (EO) treatment of dyes, including the basic principles, the influence of operating parameters on treatment performance, the advantages and disadvantages of various anode materials, and the degradation mechanisms of dyes. The article also discusses the scale-up application, techno-economic issues, and future research challenges.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Thermodynamics
Shailesh Pandey, Vimal Chandra Srivastava, Vimal Kumar
Summary: This study models and simulates the production of methanol from coal gasification using three coal samples with different ash percentages. The study analyzes the effect of input parameters such as steam-to-coal ratio and gasification temperature on performance parameters and optimizes these parameters for maximum methanol yield and minimum greenhouse gas emissions. Economic investigation reveals that high-ash coal performs better in terms of profitability and production costs. The findings of this study are important for countries with substantial low-grade high-ash coal reserves to achieve sustainable methanol production through coal diversification.
