Article
Engineering, Environmental
Matej Zula, Miha Grilc, Blaz Lokovaz
Summary: The kinetics of palmitic acid hydro-deoxygenation over sulfided NiMo/gamma-Al2O3 were investigated. The study analyzed the mass transport/surface chemistry and explored the intermediates and their impact on reaction selectivity. The results showed the significance of H2 thermodynamic phenomena and coverage on different reaction pathways.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Applied
Chao-Wei Lee, Po-Yi Lin, Bing-Hung Chen, Roman G. Kukushkin, Vadim A. Yakovlev
Summary: By utilizing the Ni-Mo(R)/ZSM-5 catalyst, hydrogenation-deoxygenation of palmitic acid can achieve conversion rates close to 99% with significant production of isomerized paraffins.
Article
Chemistry, Applied
Sebastian Perez, Andres Moreno, Zhen-Yi Du, Diana Lopez
Summary: This study proposes a controllable synthesis method for Ni-Mo catalysts using multi-wall carbon nanotubes as supports. The results show that Ni improves the formation of beta-Mo2C and enhances the hydrogenation and hydrodeoxygenation activities of the catalysts towards benzofuran. The synergistic interaction between Ni and Mo is maximized at a Ni/Mo molar ratio of 0.3.
FUEL PROCESSING TECHNOLOGY
(2022)
Article
Chemistry, Physical
Penghui Yan, Xinxin Tian, Eric M. Kennedy, Michael Stockenhuber
Summary: This study investigates the hydrodeoxygenation (HDO) of anisole over Ni/SiO2 catalysts, and explores the correlation between catalyst properties and reaction mechanism. The results show that the Ni/SiO2 catalyst exhibits strong hydrogenolysis activity for anisole, promoting the formation of condensed-ring products.
JOURNAL OF CATALYSIS
(2023)
Article
Chemistry, Physical
Anna Vikar, Hanna E. Solt, Gyula Novodarszki, Magdolna R. Mihalyi, Robert Barthos, Attila Domjan, Jeno Hancsok, Jozsef Valyon, Ferenc Lonyi
Summary: The study investigated the mechanism of catalytic hydrodeoxygenation of fats, vegetable oils, and fatty acids, finding that surface modification of the support alumina with phosphate groups significantly increased the activity of the Pd catalyst and improved paraffin yield. The research also indicated that carboxylates of less basic surface sites were more prone to HDO reaction than those of strong base sites, highlighting the importance of surface properties in the reaction process.
JOURNAL OF CATALYSIS
(2021)
Article
Engineering, Environmental
Jie Gao, Yang Cao, Gang Luo, Jiajun Fan, James H. Clark, Shicheng Zhang
Summary: In this study, a series of Ni loaded metal phosphates catalysts were prepared for the hydrodeoxygenation of lignin-derived vanillin. It was found that Ni/ZrP catalyst showed the highest activity due to its small Ni particle size, large specific surface area, strong metal-support interaction, and optimal acidity. The synergistic effect of Ni, Lewis acid sites (LAS), and Bronsted acid sites (BAS) was proven to be important for the conversion of vanillin. Hydrogen from both H2 and isopropanol contributed to the reaction, reducing the need for external H2 supply.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Energy & Fuels
Pojawan Aiamsiri, Dusadee Tumnantong, Boonyawan Yoosuk, Chawalit Ngamcharussrivichai, Pattarapan Prasassarakich
Summary: This research investigated the performance of unsupported and γ-Al2O3 supported Ni-Mo catalysts for palm oil deoxygenation to biohydrogenated diesel. It was found that the hydrothermal method for preparing 0.2-NiMoS2 catalyst was efficient, while the H-NiMoS2/γ-Al2O3-0.2 catalyst prepared using a one-step hydrothermal method showed good HDO activity. Both catalysts could be reused for at least three cycles while maintaining good performance.
Article
Chemistry, Physical
Penghui Yan, Eric Kennedy, Michael Stockenhuber
Summary: Ni-Fe catalysts prepared by different impregnation techniques were studied for their activity in the hydrodeoxygenation of guaiacol and hydrogenation of toluene. The study found that the ratio of Ni/Fe significantly influences the hydrodeoxygenation activity, with a catalyst having a Ni/Fe mass ratio of 3.3 exhibiting the highest performance.
JOURNAL OF CATALYSIS
(2021)
Article
Energy & Fuels
Bo Chen, Ruiheng Rao, Meifang Cao, Chengzhi He, Yong Qian, Xueqing Qiu, Xinping Ouyang
Summary: This study has developed a bifunctional ZrP2O7-Ni12P5 catalyst for efficiently converting lignin-derived bio-oils into hydrocarbons through HDO. The catalyst with the molar ratio of Zr/Ni at 0.4 shows the best catalytic performance, achieving high yields of cyclohexane from guaiacol and hydrocarbons from lignin-derived bio-oils under mild conditions.
Article
Energy & Fuels
Rafael Belo Duarte, Marcos Lucio Corazza, Joao Lourenco Castagnari Willimann Pimenta, Luiz Mario de Matos Jorge
Summary: A kinetic study of glycerol hydrodeoxygenation (HDO) on NiMo2C/Al2O3 and Al2O3 catalysts, prepared by sol-gel technique, was conducted at high glycerol concentration (95wt%) in a batch reactor, from 250 degrees C to 285 degrees C. The catalysts' structural and surface properties were characterized, and it was found that impregnation of alumina with Ni and Mo followed by carburization increased crystallite sizes and reduced total acidity. The reactions followed a zeroth order model and had no diffusion limitation. The main products were propanediols, ethylene glycol, long-chain molecules, as well as methane, ethane, and propane.
Article
Chemistry, Physical
Natthawan Prasongthum, Amornrat Suemanotham, Wanchana Sisuthog, Yoothana Thanmongkhon, Prasert Reubroycharoen, Lalita Attanatho
Summary: This study investigated the effects of Ni/P molar ratio on the structure and performance of catalysts, identifying different types of nickel phosphide phases. The Ni/P molar ratio significantly affected the deoxygenation reaction of palm biodiesel, which was related to the type of nickel phosphide phase, metal dispersion, metal particle size, and electron density on the nickel site.
APPLIED CATALYSIS A-GENERAL
(2022)
Article
Engineering, Chemical
Omar U. Valdes-Martinez, Jorge Noe Diaz de Leon, Carlos E. Santolalla, Alfonso Talavera-Lopez, Hugo Avila-Paredes, Jose Antonio de los Reyes
Summary: The study investigates the impact of different supports on Ru catalysts in the HDO reaction, revealing that supports have a significant influence on the activity of different molecules, which occurs through a cooperative action between the metallic phase and the support. In the reactions of ethanol and cyclohexanol, acid properties become more relevant at higher temperatures, while the metallic function decreases as the temperature rises.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2021)
Article
Chemistry, Applied
Stefan-Bogdan Ivan, Ioana Fechete, Florica Papa, Ioan-Cezar Marcu
Summary: With increasing Ni loading, the surface area of the catalysts decreases while NiO particle size, basicity, and reducibility increase, strongly influencing their catalytic performance in ethane oxydehydrogenation (ODH). Increasing Ni loading boosts ethane conversion but also increases ethylene selectivity.
Article
Thermodynamics
Rizki Insyani, Jae-Wook Choi, Chun-Jae Yoo, Dong Jin Suh, Hyunjoo Lee, Kyeongsu Kim, Chang Soo Kim, Kwang Ho Kim, Jeong-Myeong Ha
Summary: In this study, biomass pyrolysis oil was converted into petroleum-like deoxygenated hydrocarbons using a titania-supported nickel phosphide catalyst. The catalyst was effective in removing oxygen from the oil and producing high yields of cycloalkanes and hydrocarbon fuels.
ENERGY CONVERSION AND MANAGEMENT
(2022)
Article
Engineering, Environmental
Xing Zhang, Jingfeng Wu, Tian Li, Chengzhi Zhang, Lingjun Zhu, Shurong Wang
Summary: This study investigates the hydrodeoxygenation (HDO) of lignin-derived bio-oil and develops a highly stable catalyst and solvent system to enhance yield and stability. The optimized catalyst shows high activity under optimal conditions and retains its stability in repeated use. High yields are also obtained in the HDO of other complex lignin-derived compounds. This research highlights the importance of this catalyst system in biofuel production.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Energy & Fuels
Swarnalatha Mailaram, Sunil K. Maity
Summary: The study compared the cost-effectiveness of producing 10,000 MT of bio-butanol per year using dual liquid-liquid extraction and distillation from corn, sugarcane, and lignocellulose biomass. While the energy consumption per kg of bio-butanol was lower in dual LLE, the production cost was slightly higher due to complex recovery of extractants. Lignocellulose biomass had the lowest production cost, followed by corn and sugarcane.
Article
Environmental Sciences
R. K. Oruganti, D. Pal, T. K. Panda, D. Shee, D. Bhattacharyya
Summary: This study reports the synthesis of calcium oxide nanoparticles supported activated carbon from the algal-bacterial activated sludge using eco-friendly and non-toxic reagents. The prepared activated carbon exhibits excellent potential for the removal of the antibiotic compound ciprofloxacin (CIP) from liquid solutions. Adsorption studies show that the pH of the solution significantly affects the adsorption efficiency, with maximum removal achieved at pH 4.0. The Langmuir adsorption isotherm model fits the experimental results well, and the maximum adsorption capacity is determined to be 8.1 mg/g. The most plausible mechanisms involved in CIP removal include cation exchange, cation-pi interaction, hydrophobic effect, and hydrogen bonding.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2022)
Article
Agricultural Engineering
Meenu Jindal, Venkata Chandra Sekhar Palla, Bhaskar Thallada
Summary: Two different zeolites, HY and HZSM-5, with different Si/Al ratios, were used to investigate the effect of zeolite structure on aromatic hydrocarbons (AHs) production during flash hydropyrolysis of cotton stalks. Both zeolites enhanced AHs production, but the pore structure and pore size of HZSM-5 had a more pronounced effect on the reduction of oxygenated compounds. Ni/zeolite catalysts were also studied, and they promoted the conversion of phenolics and other oxygenated compounds, resulting in increased production of aromatic and aliphatic hydrocarbons through direct deoxygenation, decarbonylation, and decarboxylation reactions.
BIORESOURCE TECHNOLOGY
(2023)
Article
Chemistry, Applied
Jyoti Gahtori, Gaje Singh, Jyotishman Kaishyop, Chandewar P. Rajendra, Chelsea L. Tucker, Tuhin S. Khan, Debaprasad Shee, Ankur Bordoloi
Summary: Bx(CN)y supported cobalt nanoparticles were synthesized by regulating the precursors' ratios. Nitrogen enhanced the dispersion of cobalt particles, while boron significantly stabilized the catalyst. DFT studies confirmed that the addition of boron reduced the metal-support interaction, leading to particle aggregation. The optimized catalyst with boron and nitrogen exhibited high efficiency in aqueous phase Fischer-Tropsch synthesis.
FUEL PROCESSING TECHNOLOGY
(2023)
Article
Chemistry, Analytical
J. E. Madhusree, Pranay R. Chandewar, Debaprasad Shee, Sib Sankar Mal
Summary: Supercapacitors are a promising way to store and release nonfossil energy in high-performance, clean, safe, and cost-effective ways. Renewable biomass-derived activated carbon has been explored as a potential option for electrode material, but its specific capacitance is limited. To overcome this, polyoxometalate has been infused into the activated carbon, increasing specific capacitance and preserving the carbon's characteristics. A new hybrid material, OPAC-PMA, was developed by suffusing phosphomolybdic acid into biomass waste material, resulting in higher capacitance and cycle stability.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Bikash Ranjan Tiwari, Rajarshi Bhar, Brajesh Kumar Dubey, Sunil K. Maity, Satinder Kaur Brar, Gopalakrishnan Kumar, Vinod Kumar
Summary: In this study, a life cycle assessment (LCA) was conducted to analyze the environmental impacts of microbial production of 2,3-butanediol (BDO) from brewer's spent grains. The results showed that the pretreatment, cultivation, and fermentation stages had the highest environmental impacts. Sensitivity analysis revealed that reducing electricity consumption and transportation and increasing BDO yield could mitigate the adverse impacts of microbial BDO production.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
Article
Chemistry, Multidisciplinary
Siddharth Gadkari, Vivek Narisetty, Sunil K. Maity, Haresh Manyar, Kaustubha Mohanty, Rajesh Banu Jeyakumar, Kamal Kishore Pant, Vinod Kumar
Summary: This study presents the techno-economic and profitability analysis for fermentative production of 2,3-butanediol (BDO) using sugarcane bagasse. Different scenarios were considered, and the net unit production cost and minimum selling price of BDO were analyzed. It was found that utilizing the hemicellulose fraction of sugarcane bagasse alone could result in an economically viable plant, but only if it is annexed to a sugar mill that provides utilities and feedstock free of cost.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
Article
Chemistry, Inorganic & Nuclear
Bhimaraya R. Biradar, Sukanya Maity, Pranay R. Chandewar, Debaprasad Shee, Partha Pratim Das, Sib Sankar Mal
Summary: The use of reduced graphene oxide (rGO) mediated polyoxometalates (POMs) based electrode materials in energy storage devices has shown promising performance due to their redox properties. In this study, rGO nanocomposites embedded with silicotungstate [K5[SiVW11O40]. nH2O (SiVW11) were synthesized for supercapacitor applications. The nanocomposites exhibited improved capacitance and stability and were successfully used to power a DC motor.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Chemistry, Inorganic & Nuclear
Nithya Rajagopal, Hari Prasad Uppara, Harshini Dasari, Venkata Chandra Sekhar Palla, Sudhakara Reddy Yenumala
Summary: Novel MOF derived Ce-Ru mixed metal oxides were synthesized with addition of different amounts of PVP substance and investigated its catalytic effect towards the oxidation of diesel soot particles. These nano materials were characterized by various methods to understand their structural and surface characteristics. The addition of PVP had a significant influence on the morphology and particle size of the samples, and it also resulted in the formation of oxygen vacancies and active oxygen species. The Ce-Ru@MOF sample exhibited superior soot oxidation activity among the prepared samples.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Anjana Anandan Vannathan, Tatinaidu Kella, Debaprasad Shee, Sib Sankar Mal
Summary: Polyaniline (PANI) and carbonaceous materials and metallic compounds are important in energy storage and conversion devices. PANI has shown potential in supercapacitors due to its high specific capacitance, flexibility, and affordability. Incorporating polyoxometalates (POMs) into the conducting polymer matrix enhances electrode material stability. The PANI-PV4W8 composite exhibited excellent capacitance at 0.5 M H2SO4 electrolyte solution with a specific capacitance of 584 F g(-1). It also showed high energy and power density, as well as good capacity retention after 4500 cycles.
Article
Chemistry, Multidisciplinary
Gaje Singh, Satyajit Panda, Jyoti Gahtori, Pranay Rajendra Chandewar, Pradeep Kumar, Indrajit K. Ghosh, Ankush Biradar, Debaprasad Shee, Ankur Bordoloi
Summary: Double metal cyanide-derived iron-based catalysts were used for CO2 hydrogenation to short-chain olefins, showing potential for carbon neutrality. K-promoted double metal cyanide catalysts consisting of iron and transition metals (Mn, Co, Cu, and Zn) were prepared and tested for CO2 value addition to short-chain olefins. The results revealed different adsorption/desorption characteristics of the catalysts, affecting the CO2 conversion and selectivity of the desired products.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
Article
Chemistry, Multidisciplinary
J. E. Madhusree, Pranay R. Chandewar, Debaprasad Shee, Sib Sankar Mal
Summary: The study focuses on the nanofabrication of electroactive hybrid materials using activated carbon templates reinforced with Wells-Dawson polyoxotungstates (POMs) for high-performance supercapacitors. The integration of Wells-Dawson polyoxotungstates (P2W18) with activated carbon (AC) is analyzed for the first time, and its structural and electrochemical performances are discussed. The results show that a supercapacitor cell containing 5 wt% AC-P2W18 hybrid exhibits a specific capacitance of 289 F g-1 and an energy density of 40 W h kg-1, with 89% cyclic stability over 4000 cycles.
Article
Chemistry, Physical
Vijaykumar Dosarapu, Siddaramagoud Bandalla, Madhu Ravula, Ganesh Babu Bathula, Satyanarayana Mavurapu, Debaprasad Shee, Mohan Varkolu, Mallesham Baithy, Chandra Sekhar Vasam
Summary: Highly dispersed Ni nanoparticle catalysts supported on various supports were developed for the selective catalytic hydrogenation of levulinic acid to ?-valerolactone. Among them, the Ni-supported COK-12 catalyst exhibited the highest catalytic performance.
SUSTAINABLE ENERGY & FUELS
(2023)
Article
Chemistry, Physical
Swarnalatha Mailaram, Vivek Narisetty, Sunil K. Maity, Siddharth Gadkari, Vijay Kumar Thakur, Stephen Russell, Vinod Kumar
Summary: This study evaluated the potential of using bread waste (BW) for lactic acid (LA) production and compared two fermentation methods. The results showed that the production cost of lactic acid from bread waste was slightly higher than the market price.
SUSTAINABLE ENERGY & FUELS
(2023)
Article
Chemistry, Multidisciplinary
Jyotishman Kaishyop, Tuhin Suvra Khan, Satyajit Panda, Pranay Rajendra Chandewar, Debaprasad Shee, Tulio C. R. Rocha, Flavio C. Vicentin, Ankur Bordoloi
Summary: In this study, a Ni-based N-modified TiO2-supported catalyst was designed for the selective conversion of CO2 to formic acid. The direct coordination between Ni and N was found to enhance the catalytic activity significantly, and nitrogen doping on the TiO2 surface was shown to lower the activation energy barrier. The stable performance of this catalyst makes it potentially important for practical applications.
