Article
Chemistry, Multidisciplinary
Liyuan Qin, Jiani Li, Shengming Zhang, Zhongyuan Liu, Shuang Li, Lina Luo
Summary: Bio-oil can be used as a substitute for fossil fuels after upgrading. Bimetal-modified HZSM-5 catalysts were prepared to address catalysis problems, and the catalytic performance of Ni-Co/HZSM-5 in upgrading the simulated bio-oil was investigated. The loaded duplex metal ratio significantly affected the acidity, catalytic activity, and selectivity of Ni-Co/HZSM-5.
Article
Green & Sustainable Science & Technology
Nichaboon Chaihad, Yohanes Andre Situmorang, Aisikaer Anniwaer, Irwan Kurnia, Surachai Karnjanakom, Yutaka Kasai, Abuliti Abudula, Prasert Reubroycharoen, Guoqing Guan
Summary: Hierarchical HZSM-5 zeolites prepared by desilication with TPAOH-assisted NaOH exhibited enhanced catalytic performance in the upgrading of bio-oil derived from fast pyrolysis of sunflower stalk, with the best performance achieved through metal modification. Specifically, 0.25 wt% Cu loaded hierarchical HZSM-5 showed increased aromatic hydrocarbons yield with reduced coke formation.
Article
Energy & Fuels
Tianhan Zhu, Kun Liu, Haiyong Wang, Jing Wang, Feng Li, Chenguang Wang, Hua Song
Summary: This study investigated the HDO behavior of monometallic Ni and Ni2P catalysts and found that Ni2P/SiO2 catalyst exhibited bifunctional metal-acid properties and outstanding HDO performance. The unique electron structure and highly dispersed smaller particles of Ni2P phase contributed to its superior dispersion of active sites and cleavage ability of C-OH bond.
Article
Environmental Sciences
Christian Moretti, Blanca Corona, Ric Hoefnagels, Marco van Veen, Iris Vural-Gursel, Tobias Strating, Richard Gosselink, Martin Junginger
Summary: This study conducted an LCA of bio-based asphalts using lignin and found that the climate change impact of lignin-based asphalts could be 30-75% lower than conventional asphalts. Factors to reduce the environmental impact include increasing bitumen substitution and using low-grade biomass fuels. Trade-offs were observed in other environmental impact categories.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Chemistry, Physical
Xinyu Lu, Xiaoli Gu
Summary: The catalytic conversion of lignin is crucial for its utilization as a sustainable precursor for biochemicals. This study investigates the catalytic transfer hydrogenation of alkali lignin using various bimetallic Ni based catalysts, which showed enhanced activity and selectivity towards alkyl phenols. Different phenolic compounds were produced due to the catalytic promotion of specific reactions. The findings provide valuable insights for lignin valorization.
CATALYSIS SCIENCE & TECHNOLOGY
(2023)
Article
Chemistry, Physical
Cedric Cabral Almada, Aleksandr Kazachenko, Pascal Fongarland, Denilson Da Silva Perez, Boris N. Kuznetsov, Laurent Djakovitch
Summary: The study found that the gold catalyst tended to further oxidize the aromatics produced from lignin depolymerization, resulting in low yields of target molecules, while platinum-based catalysts enhanced yields by preserving the substructure of lignin. A kinetic model revealed that condensation reactions during lignin oxidation and degradation of aromatic compounds were the main limitations to achieving high product yields. Insights on lignin oxidation and the catalyst's role from this study would provide higher control over lignin valorization.
Article
Agricultural Engineering
Ashutosh Agarwal, Young-Tae Jo, Jeong-Hun Park
Summary: The study found that the simultaneous effect of microwave-ultrasound irradiations significantly increased the bio-oil yield from Kraft lignin depolymerization by reducing the repolymerization of reaction intermediates. This led to a higher quality and quantity of bio-oil compared to the individual microwave and ultrasound irradiation processes.
INDUSTRIAL CROPS AND PRODUCTS
(2021)
Article
Energy & Fuels
Richa Chaudhary, Paresh L. Dhepe
Summary: The study focuses on the catalytic upgradation of aromatic monomers derived from lignin depolymerization for sustainable fuel and chemical production. It compares the effects of different basic supports for metal catalysts (Pt, Pd, Ru) on the upgradation of phenol, guaiacol, and eugenol. The presence of strong basic sites and the TON levels of metal catalysts play crucial roles in catalytic activity and product formation.
Article
Biochemistry & Molecular Biology
Dhruva Mukhopadhyay, Changsomba Chang, Mohit Kulsreshtha, Pratima Gupta
Summary: This study demonstrates an integrative biorefinery concept for lignin depolymerization and recovery of phenolic and aromatic monomers using microbial electro-Fenton reaction and high throughput chromatography. The yields of acetovanillone, ethylvanillin, and ferulic acid recovered from depolymerized lignin were 2.1 %, 9.1 %, and 9.04 %, respectively. These products have diverse industrial uses and can be used as platform chemicals.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Engineering, Environmental
Pattreeya Panpian, Le Kim Hoang Pham, Suwadee Kongparakul, Mingyue Ding, Peifen Wang, Guoqing Guan, Narong Chanlek, Yingyot Poo-arporn, Prasert Reubroycharoen, Chanatip Samart
Summary: In this study, the depolymerization of lignin using Ni2P catalysts supported on nitrogen doped activated carbon (Ni2P/AC_N) was investigated. The catalyst showed high catalytic activity and phenol selectivity due to the good dispersion and small crystal size of Ni2P particles on the activated carbon surface. The proposed reaction mechanism involves lignin depolymerization via C-O and C-C cleavage with subsequent phenol formation by demethoxylation, making the Ni2P/AC_N catalyst a promising candidate for lignin transformation to phenol.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Electrochemistry
Bingjie Zhou, Zhenguo Li, Wei Liu, Yuankai Shao, Xiaoning Ren, Congjie Lv, Qingling Liu
Summary: The electrochemical activities of lignin-based composite were greatly boosted by coupling oxidized kraft lignin (OKL) with hierarchical porous nitrogen-dopped carbon (NC), achieving a capacitance of 412 Fg(-1), twice the capacitance of NC, in an acidic system. The synergetic effect between pseudocapacitive groups in OKL and nitrogen-dopped carbon with interpenetration structure was verified by various characterizations.
ELECTROCHIMICA ACTA
(2021)
Article
Chemistry, Physical
Iuliia Romanenko, Felix Kurz, Robert Baumgarten, Ivana Jevtovikj, Jean-Pierre Lindner, Arunabha Kundu, Alois Kindler, Stephan Andreas Schunk
Summary: Kraft lignin, as a major renewable bio-aromatic source, has great potential as a raw material in the chemical industry. This study presents a facile approach to depolymerize Kraft lignin into defined oligomeric units with high yields. The process involves the use of an aqueous base, a metal-containing catalyst, and an alcohol under non-oxidative conditions. The resulting oligomer product can be easily separated, and the process does not lead to char formation, making it attractive for industrialization.
Article
Chemistry, Physical
Xiaomeng Dou, Wenzhi Li, Chaofeng Zhu, Xiao Jiang
Summary: The depolymerization and demethoxylation of Kraft lignin (KL) was achieved using a novel H-NiFe2O4 catalyst under mild conditions, with high liquid product yield and minimal coke yield. The catalytic performance of H-NiFe2O4 benefits from the synergy of Ni and Fe, promoting lignin depolymerization while suppressing condensation reactions. Plausible reaction pathways of KL depolymerization over H-NiFe2O4 are discussed, demonstrating the potential of this catalytic system for efficient conversion of KL into liquid fuels.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Green & Sustainable Science & Technology
Rosarita D'Orsi, Cristian Vlad Irimia, Jeannette J. Lucejko, Bilge Kahraman, Yasin Kanbur, Cigdem Yumusak, Mateusz Bednorz, Francesco Babudri, Mihai Irimia-Vladu, Alessandra Operamolla
Summary: Lignin is an abundant biopolymer derived from industrial pulping processes, but its application as a fine material is limited due to the lack of knowledge about its molecular structure and properties. This study analyzes the structural and chemical-physical characteristics of two kraft lignins and demonstrates their efficient application as gate dielectric materials in organic field-effect transistors.
ADVANCED SUSTAINABLE SYSTEMS
(2022)
Article
Chemistry, Multidisciplinary
Jing Wang, Mei Zhang, Feng Li, Huan Wang, Yanguang Chen, Hua Song
Summary: By studying catalysts with different P/Ni ratios, the mechanism of P in hydrodeoxygenation reaction was revealed. P promotes the formation of smaller active sites and increases the acidity of acid sites. The selectivity of products can be optimized by adjusting the P content in Ni-P catalysts, leading to efficient hydrodeoxygenation catalysis.
NEW JOURNAL OF CHEMISTRY
(2022)
Article
Energy & Fuels
Ashutosh Agarwal, Seong-Jae Park, Jeong-Hun Park
Article
Engineering, Environmental
Theoneste Nshizirungu, Ashutosh Agarwal, Young Tae Jo, Masud Rana, Dong Shin, Jeong-Hun Park
JOURNAL OF HAZARDOUS MATERIALS
(2020)
Article
Agricultural Engineering
Ashutosh Agarwal, Young-Tae Jo, Jeong-Hun Park
Summary: The study found that the simultaneous effect of microwave-ultrasound irradiations significantly increased the bio-oil yield from Kraft lignin depolymerization by reducing the repolymerization of reaction intermediates. This led to a higher quality and quantity of bio-oil compared to the individual microwave and ultrasound irradiation processes.
INDUSTRIAL CROPS AND PRODUCTS
(2021)
Article
Engineering, Environmental
Theoneste Nshizirungu, Masud Rana, Young Tae Jo, Jeong-Hun Park
Summary: This research presents an efficient route for leaching valuable metals from waste LIBs using CPVC, achieving maximum extraction efficiencies of 99.15% for Li, 98.10% for Ni, 99.30% for Co, and 100% for Mn. The results suggest potential contributions towards reducing chemical consumption in industry and enhancing sustainability in waste management techniques.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Xue Li, Komal Patil, Ashutosh Agarwal, Pravin Babar, Jun Sung Jang, Xing Chen, Yung Tae Yoo, Jin Hyeok Kim
Summary: Core-shell nanowires of first-row transition metals, such as Ni(OH)(2)@CoMn-LDH, show excellent oxygen evolution reaction (OER) performance due to the ultrathin Ni(OH)(2) coating on conducting CoMn-LDH, providing strong active sites with sufficient channels for electron transfer.
NEW JOURNAL OF CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Md Ishtiaq Hossain Khan, Masud Rana, Theoneste Nshizirungu, Young Tae Jo, Jeong-Hun Park
Summary: The recycling of waste Ni-Cd batteries has become an important topic due to their environmental pollution and the loss of valuable metals. This study focuses on the efficient and environmentally friendly extraction of valuable and hazardous metals from waste Ni-Cd battery powder using a PVC-assisted subcritical water extraction method. The results show that this method can achieve high recovery efficiencies for Ni, Cd, and Co, making it a promising technology for the recycling of waste Ni-Cd batteries.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2022)
Article
Chemistry, Physical
Masud Rana, Theoneste Nshizirungu, Jeong-Hun Park
Summary: This study investigated the individual and combined effects of microwave (MW) and ultrasound (US) processes on the depolymerization of sulfuric acid hydrolysis lignin (SAHL) in a hybrid reactor. The combined use of MW and US processes resulted in higher yields of bio-oil and monomer production compared to individual use. Optimal conditions were determined through careful parameter selection and statistical analysis, demonstrating the potential of this method for converting lignin into aromatic chemicals. Future work will focus on continuous flow processes under similar optimized conditions.
SUSTAINABLE ENERGY & FUELS
(2022)
Article
Energy & Fuels
Xue Li, Komal Patil, Pravin Babar, Ashutosh Agarwal, Xing Chen, Dong Myeong Kim, Jin Hyeok Kim, Yung Tae Yoo
Summary: In this study, CoMnFeO4 with a unique nanowire-nanosheet coexisting structure was successfully synthesized by a hydrothermal method, followed by calcination. The as-prepared CoMnFeO4 exhibited outstanding oxygen evolution reaction performance in an alkaline medium, which can be attributed to its porous structure, excellent structural stability, and synergistic effect of multications.
Article
Multidisciplinary Sciences
Ashutosh Agarwal, Hasanthi L. Senevirathna, Seok Hwee Koo, Crystal Shie Lyeen Wong, Terence Sey Kiat Lim, Foo Cheong Ng, Franklin Anariba, Ping Wu
Summary: This study successfully synthesized novel flower-shaped MgO/Mg(OH)2 nanomaterials by mimicking the surface design of dragonfly wings and applied them to melamine sponges. The materials were extensively characterized and demonstrated significant bactericidal activity against different bacteria. The research suggests that these nanomaterials have the potential to reduce the risk of pathogenic bacterial infections in medical devices.
SCIENTIFIC REPORTS
(2023)
Article
Engineering, Environmental
Theoneste Nshizirungu, Masud Rana, Md Ishtiaq Hossain Khan, Young Tae Jo, Seong-Jae Park, Jeong-Hun Park
Summary: Several studies have explored the recovery of valuable metals from used lithium-ion batteries (LIBs), but efficient leaching and separation of rare metals from the cathode material remain challenging. This study presents a novel method using subcritical water-containing polyvinylidene fluoride (PVDF) for extracting high-value metals from spent LIBs. The optimized conditions achieved high extraction efficiencies for lithium, nickel, cobalt, and manganese. The research also revealed the reaction kinetics and activation energies of the leaching process, indicating that the PVDF-assisted subcritical water extraction is a promising alternative method.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Chemistry, Multidisciplinary
Masud Rana, Shubho Ghosh, Theoneste Nshizirungu, Jeong-Hun Park
Summary: In this study, the depolymerization of Kraft lignin using Mo/SBA-15, Co/SBA-15, and CoMo/SBA-15 catalysts in supercritical ethanol was investigated. The CoMo/SBA-15 catalyst showed the highest catalytic activity and yielded the highest phenolic monomers. The metal sites and acid active sites of CoMo/SBA-15 had a synergistic effect on the degradation of lignin and production of selective phenolic monomers.
