Article
Energy & Fuels
Ricardo Garcia-Morales, Abel Zunigo-Moreno, Francisco J. Veronico-Sanchez, Jose Domenzain-Gonzalez, Hugo I. Perez-Lopez, Christian Bouchot, Octavio Elizalde-Solis
Summary: The aim of this study was to synthesize fatty acid methyl esters from waste beef tallow using one-step supercritical methanol transesterification without pre-treatment. Animal waste samples were collected from local markets and experiments were conducted in a batch reactor made of Inconel 625 alloy. Various parameters such as methanol:waste beef tallow molar ratio, temperature, and pressure were investigated to obtain the fatty acid methyl esters, which were then characterized and the overall yield was calculated.
Review
Chemistry, Physical
Iqra Riaz, Iqrash Shafiq, Farrukh Jamil, Ala'a H. Al-Muhtaseb, Parveen Akhter, Sumeer Shafique, Young-Kwon Park, Murid Hussain
Summary: This article provides a review of various catalysts used in biodiesel production, with a focus on naturally derived heterogeneous catalysts. It explores the use of different heterogeneous catalysts as alternatives to homogeneous catalysts for the esterification and transesterification of nonedible and low-cost biomasses. The article also analyzes the impact and long-term performance of biodiesel in various applications, and reports advancements in catalysts and processes to facilitate further development in biodiesel production.
CATALYSIS REVIEWS-SCIENCE AND ENGINEERING
(2022)
Article
Multidisciplinary Sciences
Saw Hong Loh, Mee Kee Chen, Nur Syazana Fauzi, Ahmad Aziz, Thye San Cha
Summary: This study introduces a direct transesterification method for the rapid production of FAMEs and fatty acid analysis in microalgae using freshly harvested biomass. The results demonstrate that the DT method significantly increases FAMEs recovery compared to the conventional OET method, highlighting the importance of certain fatty acids in the membranes of microalgae cells.
SCIENTIFIC REPORTS
(2021)
Article
Chemistry, Physical
Khawer Khan, Noaman Ul-Haq, Wajeeh Ur Rahman, Muzaffar Ali, Umer Rashid, Anwar Ul-Haq, Farrukh Jamil, Ashfaq Ahmed, Faisal Ahmed, Bryan R. Moser, Ali Alsalme
Summary: The synthesis of biodiesel from Jatropha curcas by transesterification using both KOH and CaO catalysts was explored, with optimization of reaction conditions leading to high yields. The fuel properties of the optimized biodiesel met ASTM D6751 standards, while the 5% blends in petroleum diesel met ASTM D975 standards.
Article
Energy & Fuels
Naeemah A. Ibrahim, Umer Rashid, Balkis Hazmi, Bryan R. Moser, Fahad A. Alharthi, Samuel Lalthazuala Rokhum, Chawalit Ngamcharussrivichai
Summary: A magnetic bifunctional nanocatalyst supported on activated carbon was synthesized and used for the catalytic transesterification of waste cooking oil. The catalyst showed significant acidity and basicity, which contributed to a high biodiesel yield. It also exhibited magnetism, facilitating the recovery of the catalyst from the reaction mixture. Reusability experiments demonstrated the catalyst's high stability, and the biodiesel produced met the American biodiesel standard.
Article
Energy & Fuels
Ayesha Mushtaq, Muhammad Asif Hanif, Muhammad Zahid, Umer Rashid, Zahid Mushtaq, Muhammad Zubair, Bryan R. Moser, Fahad A. Alharthi
Summary: Biodiesel has many advantages compared to conventional petroleum diesel, but its high production costs, poor low temperature operability, and variability of fuel quality have limited its widespread adoption. This study used inedible tamarind seed oil as a feedstock and employed high vacuum fractional distillation and various catalytic reactions to produce consistent quality biodiesel, overcoming the low temperature performance issue.
Article
Biochemical Research Methods
Lucie K. Tintrop, Jana R. Lieske-Overgrand, Kaliyani Wickneswaran, Rukiyye Abis, Ruth Brunstermann, Maik A. Jochmann, Torsten C. Schmidt
Summary: This study introduces a method for simultaneous determination of fatty acids and fatty acid methyl esters using automated solvent-free solid-phase microextraction and isotope labeling in situ derivatization. Gas chromatography tandem-mass spectrometry with the chromatographic isotope effect and mass shift allows for selective differentiation of these two substance classes. The optimized derivatization conditions and standard addition calibration method provide accurate quantification of fatty acids and fatty acid methyl esters in different samples.
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
(2023)
Article
Engineering, Environmental
Rose Fadzilah Abdullah, Umer Rashid, Mohd Lokman Ibrahim, Muhammad Amirrul Hakim Lokman NolHakim, Bryan R. Moser, Fahad A. Alharthi
Summary: In this study, the HTC technique was used to produce an activated carbon catalyst for converting used cooking oil to biodiesel. The catalyst exhibited a mesoporous structure with high BET surface area, promoting esterification and transesterification reactions. Even after 5 reaction cycles, the catalyst maintained biodiesel yields of over 80%.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2021)
Article
Thermodynamics
Mohammed Takase, Paul Kwame Essandoh
Summary: The study aimed to produce biodiesel from animal oil as a non-edible feedstock. Acid transesterification resulted in a biodiesel yield of 90 wt.%, while alkali transesterification of esterified fats resulted in a yield of 97.2 wt.%. Biodiesel properties met standards but biodiesel from animal fats is less stable for oxidation, especially in cold weather.
INTERNATIONAL JOURNAL OF GREEN ENERGY
(2021)
Article
Chemistry, Multidisciplinary
Xiaona Yang, Yunfei Guo, Hong'en Tong, Rongfang Liu, Rong Zhou
Summary: In this work, a metal-free acceptorless dehydrogenative cross-coupling reaction for both carbon-heteroatom and carbon-carbon bond formation has been developed. The reaction was achieved through the synergistic catalysis of the organophotocatalyst 4CzIPN and a thiol under blue light irradiation, enabling the coupling of aldehydes with alcohols or two different alcohols with a broad substrate scope and good functional group compatibility. Mechanistic studies revealed the generation and subsequent oxidation of an acyl radical to its cation under photocatalytic conditions.
Article
Chemistry, Multidisciplinary
Marcelo A. do Nascimento, Juan P. C. Vargas, Jose G. A. Rodrigues, Raquel A. C. Leao, Patricia H. B. de Moura, Ivana C. R. Leal, Jonathan Bassut, Rodrigo O. M. A. de Souza, Robert Wojcieszak, Ivaldo Itabaiana Jr
Summary: In recent years, there has been intensive research on transforming lignocellulosic biomass into high value-added chemical products. Levoglucosan (LG) is a promising platform molecule obtained from the biomass matrix. This study focused on enzymatic acylation of LG to obtain carbohydrate fatty acid esters (CFAEs). Optimized reaction conditions were determined using a continuous flow system, resulting in significantly improved productivity compared to batch systems. The CFAEs showed potential in reducing interfacial tension and exhibiting biological activity.
Review
Energy & Fuels
Eulalia L. S. Barros, Evertan A. Rebelatto, Diego A. Mayer, Joao H. C. Wancura, J. Vladimir Oliveira
Summary: Sugar esters (SE) are amphiphilic compounds with environmentally friendly features, including non-toxicity, odorless, tasteless, biodegradability, and various functions. The use of lipases as biocatalysts for SE production offers advantages such as reduced energy consumption, higher selectivity, and less use of harmful solvents. Supercritical fluids, especially carbon dioxide, are attractive solvents for SE production due to their unique properties. However, there are challenges in terms of operating conditions and costs. Future research should focus on developing cost-effective bioreactors and enhancing lipases' stability. Rating: 8
CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION
(2023)
Article
Chemistry, Multidisciplinary
Yubin Wang, Xiaoqiu Tao, Jun Li, Siqi Zhang, Yang Jin, Ming Chen
Summary: Fatty acid methyl esters (FAMEs) were produced by esterification in a rotor-stator spinning disc reactor (RSSDR), which showed excellent mixing efficiency and phase separation. The study investigated the influence of various variables on esterification conversion and productivity, finding significant impacts on the results. Compared to traditional reactors, RSSDR demonstrated higher efficiency in producing FAMEs.
KOREAN JOURNAL OF CHEMICAL ENGINEERING
(2021)
Article
Chemistry, Applied
Hyunjong Yu, Sungjun Kim, Pahn-Shick Chang
Summary: This study demonstrates that the production efficiency of pyridoxine monolaurate can be enhanced by using a solvent-free gas bubbling system with immobilized Candida antarctica lipase B. Moreover, this system shows the best reusability of the lipase and the highest volumetric productivity compared to conventional organic solvent and solvent-free systems.
Article
Polymer Science
Celeste Libretti, Michael A. R. Meier
Summary: In this study, direct transesterification of cellulose was achieved and cellulose esters with different degrees of substitution were successfully synthesized. The obtained cellulose esters exhibited good thermal stability, UV absorption, and antioxidant properties. Additionally, the switchable solvent system demonstrated excellent recyclability.
Article
Chemistry, Multidisciplinary
Sushmita Banerjee, Shikha Dubey, Ravindra Kumar Gautam, M. C. Chattopadhyaya, Yogesh C. Sharma
ARABIAN JOURNAL OF CHEMISTRY
(2019)
Article
Environmental Sciences
Sushmita Banerjee, Yogesh Chandra Sharma
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2019)
Article
Green & Sustainable Science & Technology
Pavan K. Gautam, Pingali M. Shivapriya, Sushmita Banerjee, Amaresh K. Sahoo, Sintu K. Samanta
ENVIRONMENTAL PROGRESS & SUSTAINABLE ENERGY
(2020)
Article
Green & Sustainable Science & Technology
Shalini Sahani, Tania Roy, Yogesh Chandra Sharma
JOURNAL OF CLEANER PRODUCTION
(2019)
Article
Green & Sustainable Science & Technology
Tania Roy, Shalini Sahani, Yogesh Chandra Sharma
JOURNAL OF CLEANER PRODUCTION
(2020)
Article
Environmental Sciences
Sushmita Banerjee, Shalini Sahani, Yogesh Chandra Sharma
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2019)
Article
Thermodynamics
Shalini Sahani, Tania Roy, Yogesh Chandra Sharma
ENERGY CONVERSION AND MANAGEMENT
(2020)
Article
Engineering, Environmental
Shalini Sahani, Tania Roy, Yogesh Chandra Sharma
Article
Energy & Fuels
Tania Roy, Shalini Sahani, Yogesh Chandra Sharma
Article
Green & Sustainable Science & Technology
Tania Roy, Shalini Sahani, Devarapaga Madhu, Yogesh Chandra Sharma
JOURNAL OF CLEANER PRODUCTION
(2020)
Article
Chemistry, Applied
Shalini Sahani, Yogesh Chandra Sharma
Summary: Nanotechnology plays a significant role in improving the characteristics and applications of food ingredients in the food industry, with a focus on enhancing solubility and controlled release. Research highlights advancements in preparation methods of nanostructures for food additives and packaging materials, while also addressing the environmental impact and potential solutions.
Review
Engineering, Chemical
Shalini Sahani, Siddh Nath Upadhyay, Yogesh Chandra Sharma
Summary: Biodiesel production from nonedible and waste-cooking oils generates glycerol, which has various applications as a platform molecule for producing valuable derivatives like glycerol carbonate. The transesterification process using dimethyl carbonate is considered the most efficient method for glycerol carbonate production, with mild reaction conditions and less harmful reagents. This review evaluates recent studies on large scale production of glycerol carbonate using different catalysts, discussing relevant reaction parameters and suggesting areas for future research.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2021)
Article
Electrochemistry
SungHoon Jung, Pham Thi Huong, Shalini Sahani, Kumud Malika Tripathi, Byung Jun Park, Young Hee Han, TaeYoung Kim
Summary: A facile method is reported to produce composites of hierarchically porous graphene-based materials embedded with onion-like carbons (Gr-OLCs) for high power density supercapacitors. The carbon material showed high specific capacitance and power density, making it a promising electrode material for high power energy storage devices.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2022)
Article
Chemistry, Multidisciplinary
Shalini Sahani, Seung Jun Park, Yusik Myung, Thi-Huong Pham, Tran Thanh Tung, TaeYoung Kim
Summary: A novel room-temperature gas sensor composed of polymeric graphitic carbon nitride composite was developed and used for the detection of ethanol vapor under ambient conditions. The sensor exhibited excellent sensing efficiency, high selectivity, and stability, with a swift response time provided under ambient conditions.
Article
Engineering, Chemical
Xu Yang, Jieshi Xiao, Jian Huang, Kaixiang Peng
Summary: This study introduces an online convolutional adversarial autoencoder (AAE) model to learn representative industrial process information. By extracting features that reflect diverse information and follow a Gaussian distribution, the model improves the accuracy of fault detection and removes redundant information through a feature selection strategy.
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(2024)
Article
Engineering, Chemical
Shao-Yang Wu, Meng-Tsun Lai, Chung-Hui Hsu, Kevin C. W. Wu, Yesong Gu
Summary: This study investigated the effectiveness of using Fe-based MOF or MIL-100(Fe) in conjunction with a PEDOT-modified Pt electrode for detecting the synthetic azo dye tartrazine. By modifying the electrode with two different methods, favorable lower reductive potentials, competitive sensitivities, and good repeatability and stability were achieved in all MIL-100(Fe)/PEDOT/Pt electrodes.
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(2024)