Article
Chemistry, Applied
S. Houda, C. Lancelot, P. Blanchard, L. Poinel, C. Lamonier
Summary: The study demonstrated the efficiency of oxidative desulfurization (ODS) on marine fuels using H2O2 as the oxidizing agent with a low oxidant to sulfur ratio for economic and environmental reasons. Ultrasound assisted ODS (UAOD) was found to enhance conversions and sulfur removal significantly, especially for fuels with lower viscosity, showing great potential for industrial applications.
Article
Energy & Fuels
M. Christina Nilavu, B. Arunraj, Himanshu Aggarwal, N. Rajesh
Summary: By oxidizing and modifying carbon from Prosopis juliflora wood, sulfur removal from model fuel oil was efficiently achieved via adsorption with ultrasound assistance. The adsorbent exhibited a high specific surface area and mesoporous structure, leading to excellent removal efficiency for Dibenzothiophene. The adsorption process was thermodynamically favorable and followed pseudo-second-order kinetics.
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
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
Energy & Fuels
Shao-Xu Mao, Jun-Yi Song, Wen-Shuai Zhu, Hua-Ming Li, Jing-Yu Pang, Dong-Bin Dang, Yan Bai
Summary: Four new types of amphiphilic polyoxometalate-based poly(ionic liquid) (PDB-PMo, PDO-PMo, PDD-PMo and PDH-PMo) were synthesized and investigated for oxidative desulfurization (ODS). Among them, PDD-PMo exhibited high desulfurization rate, reaching 100% at a temperature range of 0-50 degrees C. The introduction of hydrophilic IL monomer was found to be an efficient strategy for constructing amphiphilic polyoxometalate-based poly(ionic liquid) and achieving ultra-deep desulfurization.
Article
Chemistry, Physical
Bo Yuan, Xiaolin Li, Yinyong Sun
Summary: Oxidative desulfurization (ODS) has gained much attention for its effective removal of difficult-to-desulfurize aromatic sulfur-containing compounds. Molecular oxygen has been recognized as an ideal oxidant in ODS, and porous materials and their composites have become ideal catalysts for aerobic oxidation reactions due to their high surface area and confined pore space. These catalysts have received significant attention in AODS for their improvement in catalytic activity and durability.
Article
Chemistry, Multidisciplinary
Simone Fernandes, Daniela Flores, Daniel Silva, Isabel Santos-Vieira, Fatima Mirante, Carlos M. Granadeiro, Salete S. Balula
Summary: An effective and sustainable oxidative desulfurization process was developed using a composite material (EuW10@ZIF-8) as a heterogeneous catalyst. The composite exhibited remarkable desulfurization performance and excellent stability during multiple cycles.
Article
Chemistry, Multidisciplinary
Habib Esmaili, Seyed Ali Hosseini
Summary: LaMnxCo1-xO3 (x=0, 0.25) perovskites were developed as novel nanocatalysts for the desulfurization of thiophenes compounds by catalytic oxidative desulfurization (CODS) and ultrasound-assisted oxidative desulfurization (UAOD). The perovskites exhibited superior activity due to easy reducibility and high surface electron density. Ultrasound waves enhanced the activity of the catalysts, leading to the reusability of LaMn0.25Co0.75O3 for at least 5 cycles. This study proposed a mechanism for DBT oxidation and determined the desulfurization rate of thiophene derivatives. Perovskites showed great potential as nanocatalysts for fuel desulfurization.
Article
Energy & Fuels
Filipa Lima, Luis C. Branco, Armando J. D. Silvestre, Isabel M. Marrucho
Summary: This review article presents the use of deep eutectic solvents (DES) in removing sulfur pollutants from transportation fuels, highlighting the urgent need to reduce the impact of fossil fuels impurities on outdoor air pollution. A comparative evaluation with Ionic Liquids (ILs) shows that DES has advantages in extracting sulfur contaminants, but the efficiency gap between simulated matrices and real fuels is still a challenge to be addressed.
Article
Engineering, Environmental
Komal Desai, Swapnil Dharaskar, Jalaja Pandya, Satyam Shinde, Vinay Vakharia
Summary: Due to the growing use of oil and global air production, there is an increasing demand for producing ultra-clean fuels. A new ultrasound-assisted extractive/oxidative desulfurization process has been developed to produce ultra-pure oils, and machine learning models have been used to validate the experimental findings.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2022)
Article
Chemistry, Inorganic & Nuclear
Josefa Ortiz-Bustos, Helena Perez del Pulgar, Yolanda Perez, Isabel del Hierro
Summary: Polyoxometalate (POM) mesoporous silica-based materials with hydrophilic and hydrophobic properties have been designed as powerful heterogeneous catalysts in oxidative desulfurization (ODS) by adsorbing both H2O2 and sulphur-containing compounds simultaneously. The formation of charge transfer salts and the masking of silanol groups on the silica surface influence the catalysts' interactions and enhance the adsorption properties of non-polar dibenzothiophene (DBT). An extensive characterization of the materials has been performed using spectroscopy and electrochemical techniques to understand POM-surface and POM-POM anion interactions.
DALTON TRANSACTIONS
(2023)
Article
Biotechnology & Applied Microbiology
Komal Desai, Swapnil Dharaskar, Jalaja Pandya, Satyam Shinde
Summary: A phosphonium-based ionic liquid was used as a catalyst/extractant for desulfurization of model oil and base oil, achieving a maximum sulfur removal rate of 98.67% under ultrasound-assisted oxidative desulfurization. The PIL was regenerated and recycled multiple times without significant efficiency decrease, demonstrating its potential for industrial application in the desulfurization process.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2021)
Review
Energy & Fuels
Alireza Hosseini, Ali Khoshsima, Mazaher Sabzi, Ata Rostam
Summary: Fuel oil desulfurization is a challenging process in petroleum refineries due to economic considerations. Ionic liquids have been introduced as a beneficial alternative to traditional organic solvents. This review examines the application of ionic liquids in different desulfurization processes and reviews the governing factors in detail.
Article
Environmental Sciences
Komal Desai, Swapnil Dharaskar, Mohammad Khalid, Thummalapalli Chandra Sekhara Manikyam Gupta
Summary: In this study, a novel phosphonium-based ionic liquid was synthesized and utilized as a phase transfer catalyst in ultrasound-assisted oxidative desulfurization of model fuel. The maximum desulfurization efficiency (>99%) was achieved by optimizing process parameters and reaction conditions. Ultrasound-assisted oxidative desulfurization with the ionic liquid showed the highest desulfurization efficiency compared to other methods.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Engineering, Environmental
Junzhen Guo, Liang Chu, Haibin Yang, Zhi Huang, Mu Yang, Ge Wang
Summary: In this study, an amphiphilic Mo/HNT/S nanoreactor was developed by immobilizing MoOx on the internal surface of halloysite nanotubes (HNT) and modifying the external surface with organosilanes. The catalyst exhibited high activity for oxidative desulfurization and showed improved stability over multiple cycles. The amphiphilic nature of the nanoreactor allowed for enhanced dispersion in the oil phase and formation of a concentrated microenvironment for the reactants and reactive oxygen species. This catalytic system eliminates the need for solvent extraction in the desulfurization process, making it a promising candidate for large-scale industrial applications.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Applied
H. A. Choudhury, X. Cheng, S. Afzal, A. Prakash, B. J. Tatarchuk, N. O. Elbashir
Article
Chemistry, Applied
Aya E. Abusrafa, Mohamed S. Challiwala, Hanif A. Choudhury, Benjamin A. Wilhite, Nimir O. Elbashir
Article
Energy & Fuels
Puneet Pathak, Ankush Gupta, Nishi Kant Bhardwaj, Arun Goyal, Vijayanand Suryakant Moholkar
Summary: This study focuses on the impact of formic acid-based organosolv (FAOS) pretreatment on sugarcane tops (SCT) for biomass fractionation. The best conditions for FAOS pretreatment of SCT were found to be 125 degrees Celsius pretreatment temperature, 90 min pretreatment time, and 1:7.5 solid to liquid ratio. Temperatures and times higher than these values adversely affected SCT fractionation.
BIOMASS CONVERSION AND BIOREFINERY
(2021)
Article
Engineering, Chemical
Kuldeep Roy, Chandrodai Agarkoti, Ritesh S. Malani, Binota Thokchom, Vijayanand S. Moholkar
CHEMICAL ENGINEERING SCIENCE
(2020)
Article
Biochemical Research Methods
Mohanapriya Nedumaran, Shweta Singh, Sumitha Banu Jamaldheen, Riyanka Nath, Vijayanand Suryakant Moholkar, Arun Goyal
PREPARATIVE BIOCHEMISTRY & BIOTECHNOLOGY
(2020)
Article
Chemistry, Multidisciplinary
Kedar Sharma, Kaustubh Chandrakant Khaire, Abhijeet Thakur, Vijayanand Suryakant Moholkar, Arun Goyal
Article
Agricultural Engineering
Shweta Singh, Vikky Rajulapati, Sumitha Banu Jamaldheen, Vijayanand Suryakant Moholkar, Arun Goyal
INDUSTRIAL CROPS AND PRODUCTS
(2020)
Article
Energy & Fuels
Harrison Hihu Muigai, Urbashi Bordoloi, Rojimul Hussain, Karangat Ravi, Vijayanand S. Moholkar, Pankaj Kalita
Summary: This study synthesized and characterized biochars produced from water hyacinth, yellow oleander, and sugarcane bagasse, comparing their properties at 350°C and 550°C. The biochar produced from sugarcane bagasse at 550°C showed the best properties among all feedstocks.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Acoustics
Amit H. Batghare, Kuldeep Roy, Vijayanand S. Moholkar
ULTRASONICS SONOCHEMISTRY
(2020)
Article
Agricultural Engineering
Harrison Hihu Muigai, Bhaskar J. Choudhury, Pankaj Kalita, Vijayanand S. Moholkar
BIOMASS & BIOENERGY
(2020)
Article
Biochemical Research Methods
Kaustubh Chandrakant Khaire, Vijayanand Suryakant Moholkar, Arun Goyal
Summary: In this study, cellulose from sugarcane tops was extracted and characterized for purity, showing high purity suitable for bioethanol production. The separated cellulose demonstrated a fibrous structure, increased crystallinity index, and successful hydrolysis into total reducing sugar by specific enzymes, highlighting its potential as an alternative substrate for commercialization and bioethanol production.
PREPARATIVE BIOCHEMISTRY & BIOTECHNOLOGY
(2021)
Article
Multidisciplinary Sciences
Mohamed S. Challiwala, Hanif A. Choudhury, Dingdi Wang, Mahmoud M. El-Halwagi, Eric Weitz, Nimir O. Elbashir
Summary: This study demonstrates two patented processes for converting CO2 and CH4 into solid carbon as a potential carbon capture and sequestration technique. The first process can reduce energy requirement by at least 50% and achieve at least 65% CO2 conversion, while the second process offers an alternative pathway for the regeneration/reactivation of spent DRM/CARGEN catalyst by using CO2.
SCIENTIFIC REPORTS
(2021)
Article
Chemistry, Physical
Shaik Afzal, Anuj Prakash, Patrick Littlewood, Hanif Choudhury, Zafar Khan Ghouri, Said Mansour, Dingdi Wang, Tobin Marks, Eric Weitz, Peter Stair, Nimir Elbashir
Summary: After thermal treatment, a commercial nickel catalyst coated with alumina exhibited higher activity and carbon formation rates compared to an uncoated catalyst in hydrocarbon reforming processes. Various analytical techniques suggested that this unexpected phenomenon could be attributed to the unique characteristics of the alumina overcoat, including the formation of a thicker 'quasi-ALD' layer, crystallization into nanofibers, and the ability to isolate carbon as carbon nano-onions (CNOs).
Article
Biochemistry & Molecular Biology
Kedar Sharma, Sudhir Morla, Kaustubh Chandrakant Khaire, Abhijeet Thakur, Vijayanand Suryakant Moholkar, Sachin Kumar, Arun Goyal
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2020)
Proceedings Paper
Materials Science, Multidisciplinary
Neha Singh, Arun Goyal, Vijayanand S. Moholkar
MATERIALS TODAY-PROCEEDINGS
(2020)