Article
Energy & Fuels
Xiaoqi Wang, Xinhua Qi, Mo Qiu, Feng Shen, Jirui Yang, Boxiong Shen
Summary: A Ni/Ru bimetallic ordered mesoporous carbon (Ni/Ru@WOMC) was successfully prepared using solvent evaporation induced self-assembly (EISA) method. The resulting material exhibited excellent catalytic activity in the hydrogenation of levulinic acid (LA) to gamma-valerolactone (GVL). The Ni/Ru@WOMC catalyst could be reused multiple times without significant loss of its catalytic performance, which can be attributed to its ordered mesoporous structure. This development opens up new opportunities for the catalytic application of lignin derived functionalized ordered mesoporous carbon in biomass transformation reactions.
Article
Biochemistry & Molecular Biology
Margarita Popova, Ivalina Trendafilova, Manuela Oykova, Yavor Mitrev, Pavleta Shestakova, Magdolna R. Mihalyi, Agnes Szegedi
Summary: Monometallic and bimetallic catalysts supported on KIT-6 based mesoporous silica/zeolite composites were prepared and characterized. The bimetallic CuNi-KIT-6 catalyst showed high stability and conversion rate in gas-phase reactions.
Article
Multidisciplinary Sciences
Nayan J. Mazumdar, Gunjan Deshmukh, Anna Rovea, Praveen Kumar, Miryam Arredondo-Arechavala, Haresh Manyar
Summary: Selective hydrogenation of levulinic acid to gamma-valerolactone using copper on manganese oxide octahedral molecular sieve (OMS-2) catalysts was studied, with optimization of process parameters showing the most significant influence from H2 pressure and catalyst loading. The response surface methodology model demonstrated a synergistic effect of reaction temperature and H2 pressure on GVL yield.
ROYAL SOCIETY OPEN SCIENCE
(2022)
Article
Energy & Fuels
Murali Kondeboina, Siva Sankar Enumula, K. Saidulu Reddy, Prathap Challa, David Raju Burri, Seetha Rama Rao Kamaraju
Summary: The addition of Ni to Co/γ-Al2O3 catalyst enhances the catalytic activity and coke resistance capacity of the resulting bimetallic catalyst, resulting in the formation of Ni-Co alloy as evidenced by XRD, H-2-TPR, and XPS analyses. TEM analyses show that smaller particles are formed in the bimetallic Ni-Co/γ-Al2O3 catalyst, influencing the rate of GVL formation. Furthermore, among the GVL feedstocks, ethyl levulinate proves to be the most consistently yielding GVL over the bimetallic Ni-Co/γ-Al2O3 catalyst during a 24-hour study.
Article
Chemistry, Physical
Guanyi Zhang, Kai Zhao, Qingqing Zhu, Xiangjin Kong
Summary: The design of a robust catalyst is crucial for the effective utilization of biomass platforms. In this study, a Co@mSiO(2)-CN catalyst was successfully fabricated through a simple strategy, which achieved 100% yield of gamma-valerolactone from levulinic acid under mild reaction conditions. The introduction of nitrogen-doped carbon materials enhanced the dispersion of Co and the Lewis acidity of the catalyst, resulting in improved hydrogen dissociation and C-O activation. The synergistic effect between the hydrogenation metal sites and Lewis acidic sites contributed to the excellent activity of the catalyst.
Article
Engineering, Environmental
Nayan Jyoti Mazumdar, Praveen Kumar, Miryam Arredondo-Arechavala, Nancy Artioli, Haresh Manyar
Summary: Copper nanoparticles supported on manganese oxide octahedral molecular sieves were prepared using mechanochemical ball milling and wet-impregnation methods. The ball-milled catalysts showed smaller particle size and higher catalytic activity in the liquid phase hydrogenation reaction compared to the catalysts prepared by wet impregnation.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Agricultural Engineering
Jiao Li, Tao Li, Yang Wang, Zicheng Du, Yadan Luo, Chengrong Qin, Chen Liang, Caoxing Huang, Shuangquan Yao
Summary: The effect of a bio-based solvent coupled pretreatment system on the separation of poplar biomass components was investigated, showing that the method can effectively separate cellulose and inhibit the repolymerization of lignin.
INDUSTRIAL CROPS AND PRODUCTS
(2023)
Article
Chemistry, Multidisciplinary
Margarida M. M. Antunes, Andreia F. F. Silva, Auguste Fernandes, Filipa Ribeiro, Patricia Neves, Martyn Pillinger, Anabela A. A. Valente
Summary: In this study, hafnium-containing multifunctional compounds were prepared for the chemical valorization of levulinic acid, alpha-angelica lactone, and furfural through integrated catalytic transfer hydrogenation and acid reactions. The results showed that the material properties and substrate type played a crucial role in the catalytic performance.
FRONTIERS IN CHEMISTRY
(2022)
Article
Energy & Fuels
Yao Liu, Feiyi Chen, Junhua Zhang, Liang He, Lincai Peng
Summary: Organic acid-assisted metal-lignocellulosic hybrid improves catalytic performance for the CTH of carbonyl compounds, showing excellent activity and stability.
Article
Green & Sustainable Science & Technology
Rulu Huang, Huai Liu, Junhua Zhang, Yuan Cheng, Liang He, Lincai Peng
Summary: This study presents a metal ion-polymer hybridization approach to design a Hf@PAN-TP nanofiber catalyst for the efficient conversion of LvA to GVL. The catalyst exhibited high activity, selectivity, and stability, highlighting its potential for biomass-derived aldehydes/ketones upgrading.
Article
Green & Sustainable Science & Technology
Eleni Anagnostopoulou, Panagiotis Lilas, Perikleia Diamantopoulou, Christos Fakas, Ioannis Krithinakis, Eleni Patatsi, Elpida Gabrielatou, Antoine P. van Muyden, Paul J. Dyson, Georgios Papadogianakis
Summary: Water-dispersible ruthenium nanoparticles stabilized by water-soluble polymers have shown high catalytic activities and stabilities, achieving high selectivity in the hydrogenation of levulinic acid to produce gamma-valerolactone. This study holds significance for the production of advanced biofuels, bio-based chemicals, and materials.
Article
Chemistry, Multidisciplinary
Hamzeh H. Veisi, Babak Karimi, Mohsen Heydari, Rafael Luque
Summary: A novel catalyst Ru@IBOMC was prepared and successfully used for the continuous flow catalytic hydrogenation of LA to γ-valerolactone and N-containing heterocycles at room temperature. The catalyst showed excellent activity and selectivity under different reaction variables and exhibited high stability in various solvents.
Article
Energy & Fuels
Chen Liu, Baofang Liang, Fangli Jing, Shizhong Luo
Summary: Ni/CeO2 catalysts with different Ni loadings were prepared and characterized to investigate their effects on catalytic performance. The addition of Ni reduced the activation energy and improved the acidity, resulting in enhanced catalytic efficiency. Among the bimetallic catalysts, Ni/CeO2 showed the best performance and coke resistance.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Chemistry, Physical
R. Bassi, P. Baeza, C. Sepulveda, I. T. Ghampson, E. Camu, A. Bruckner, U. Bentrup, J. L. G. Fierro, N. Escalona
Summary: The study investigated the conversion of levulinic acid using rhenium oxide catalysts supported on different materials, and found that ZrO2 interacted more strongly with ReOx, leading to modified electronic character of the sites.
APPLIED CATALYSIS A-GENERAL
(2021)
Article
Chemistry, Multidisciplinary
Sharda Kondawar, Chandrashekhar Rode
Summary: This short review summarizes recent findings on the role of ionic liquids (ILs) in catalyzing the hydrogenation of levulinic acid (LA) to gamma valerolactone (GVL). It provides a brief introduction to the environmentally friendly nature of ILs as catalysts and discusses various types of ILs used for the hydrogenation of LA to GVL. The unique characteristics of ILs responsible for the hydrogenation reaction are explained, along with the current and upcoming scenarios of IL-catalyzed hydrogenation of LA to GVL.
CURRENT OPINION IN GREEN AND SUSTAINABLE CHEMISTRY
(2022)
Article
Energy & Fuels
Nagaraju Nekkala, Putrakumar Balla, Srinivasa Rao Ginjupalli, Prem Kumar Seelam, S. K. Hussain, Bhanuchander Ponnala, V. R. Chary Komandur
Summary: The preparation and performance of catalysts for the conversion of lactic acid to acrylic acid were studied. By adjusting the lanthanum to phosphorus ratio and calcination temperature, the optimal catalyst combination was found, achieving high conversion of lactic acid and yield of acrylic acid.
BIOMASS CONVERSION AND BIOREFINERY
(2022)
Correction
Environmental Sciences
Balla Putrakumar, Prem Kumar Seelam, Ginjupalli Srinivasarao, Karthikeyan Rajan, Mitta Harishekar, Keiski Riitta, Tong Xiang Liang
WASTE AND BIOMASS VALORIZATION
(2022)
Article
Chemistry, Physical
Yucheng Lv, Tao Yang, Xinmei Hou, Zhi Fang, Karthikeyan Rajan, Yao Di, Wenkun Peng, Yiqun Deng, Tongxiang Liang
Summary: Yttrium-stabilized zirconia@reduced graphene oxide (YSZ@rGO) nanofibers with uniform porous structure were prepared through electrospinning and thermal reduction process. PEDOT/YSZ@rGO electrode was fabricated by electrodeposition and showed high sensitivity for methyl parathion (MP) detection. The sensor exhibited excellent performance in terms of detection limit, linear detection range, and anti-interference ability, making it suitable for applications in food safety and wastewater monitoring.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Environmental Sciences
Bhanuchander Ponnala, Putrakumar Balla, S. K. Hussain, Srinivasa Rao Ginjupalli, Kumaraswamy Koppadi, Nagaraju Nekkala, Vijayanand Perupogu, Ulla Lassi, Prem Kumar Seelam
Summary: The study investigates the production of 1,3-propanediol from glycerol, an important by-product of biodiesel production. By adjusting the composition of the catalyst and reaction conditions, the researchers achieved a sustainable and cleaner process for glycerol conversion with high efficiency.
WASTE AND BIOMASS VALORIZATION
(2022)
Article
Engineering, Environmental
Rajesh Rajendiran, Prem Kumar Seelam, Arunkumar Patchaiyappan, Putrakumar Balla, Harisingh Shankar, Balaga Ravi, Vijayanand Perupogu, Ulla Lassi
Summary: The shape and crystal facet structure of nanoparticles play a crucial role in their catalytic activity. This study synthesized silver nanoparticles with different shapes and facets and found that nanocubes with selective exposure of (100) facets exhibited higher catalytic activity.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Rajesh Rajendiran, Ravi Balaga, Putrakumar Balla, Prem Kumar Seelam, Prathap Challa, Alagusundari Karuppiah, Vijayanand Perupogu, Venkatesan Rengarajan, Ulla Lassi, Esraa M. Bakhsh, Sher Bahadar Khan
Summary: Versatile heterogeneous nanocatalysts based on PdNPs decorated on metal oxides supports were designed and characterized. The catalysts showed high yields in the conversion of GVL to PA and the reduction of 4-NP to 4-AP. The relationship between the active sites and the catalytic performance was evaluated through various techniques. The thermodynamic parameters of the activation energy for the reduction reaction were calculated for different catalysts.
CATALYSIS COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Putrakumar Balla, Prem Kumar Seelam, Rajendiran Rajesh, Ravi Balaga, Prathap Challa, G. Kauslya Sasikumar, Vijayanand Perupogu, Ulla Lassi, Kim Sungtak
Summary: The greener synthesis of eco-friendly GVL fuel additive through the hydrogenation of LA entails the use of highly active and stable CuNPs embedded in the OMC support material. The Cu/OMC nanocatalyst exhibits remarkable activity and stability due to the confinement effects in the mesoporous carbon and the highly dispersed Cu particles. The synthesized catalyst maintains its stability and activity even after 60 hours of continuous testing under optimized conditions.
CATALYSIS COMMUNICATIONS
(2023)
Article
Chemistry, Applied
Prem Kumar Seelam, Putrakumar Balla, Rajesh Rajendiran, Balaga Ravi, Challa Prathap, Ulla Lassi, Sungtak Kim, Perupogu Vijayanand
Summary: Nickel modified strontium hydroxyapatite (Ni/Sr-HAP) supported catalysts with different sizes and aspect ratios were prepared and used in selective methanation of CO/CO2. The smaller sized nano rod-shaped catalyst showed higher activity and selectivity based on the characterization and catalysts activity results.
TOPICS IN CATALYSIS
(2023)
Article
Green & Sustainable Science & Technology
B. Putrakumar, Prem Kumar Seelam, G. S. Rao, N. Pethan Rajan, P. Bhanuchander, G. Raveendra, P. Vijayanand, U. Lassi, E. M. Bakhsh, S. B. Khan, S. Kim
Summary: This research introduces a catalytic system consisting of highly dispersed Cu nanoparticles encapsulated in a nanoporous carbon structure for selective hydrogenation. The Cu@C catalysts demonstrate high activity in the hydrogenation of y-valerolactone (GVL) to 1,4-pentanediol. The dispersion of the active copper phase, along with particle size and surface acidity, directly affects the catalytic performance. Overall, Cu@C shows promise as a non-noble metal-based catalytic system for upgrading biomass-based platform molecules through selective hydrogenation.
MATERIALS TODAY SUSTAINABILITY
(2023)
Article
Materials Science, Multidisciplinary
Nekkala Nagaraju, Koppadi Kumaraswamy, Seelam Prem Kumar, Mitta Harishekar, Satya Kamal Chirauri, Sungtak Kim, Ginjuppali Srinivasrao, Balla Putrakumar
Summary: Zeolite-supported tungsten oxide catalysts were studied for the esterification of lactic acid with alcohols. The Y zeolite with SiO2/Al2O3 = 60 and 10% WO3 loading showed the highest activity and selectivity in the esterification reaction with butanol. Weak and moderate acid sites on the catalyst surface played a crucial role in the selective formation of butyl lactate, while strong acid sites enhanced secondary reactions and decreased the selectivity of butyl lactate.
EMERGENT MATERIALS
(2023)
Article
Engineering, Chemical
Duygu Kocaefe, Julie Bureau, Armita Rastegari, Karthikeyan Rajan, Yasar Kocaefe
Summary: Aluminium is produced by electrolysis using carbon anodes. The properties of anodes, such as density and resistivity, can be improved by modifying the pitch used as a binder. In this study, the effect of pitch type on the effectiveness of pitch modification in improving anode properties was investigated. High QI pitch showed improved properties when modified, while modifying low QI pitch did not significantly affect anode properties.
CANADIAN JOURNAL OF CHEMICAL ENGINEERING
(2023)
Article
Engineering, Environmental
Rajesh Rajendiran, Shrutika Lingalwar, Assa Aravindh, Alagusundari Karuppiah, Putrakumar Balla, Prem Kumar Seelam, B. Shanmugavelu, Vijayanand Perupogu, Sungtak Kim, Ulla Lassi
Summary: This study investigates the vapor phase oxidation of benzyl alcohol (BnOH) over morphologically designed spherical silver nanoparticles (AgNPs) decorated on manganese oxide nanorods (α-MnO2NRs) in the presence of air. The combination of AgNPs and α-MnO2NRs enables increased oxygen vacancies and strong metal-support interactions on the surface. The optimized 1 wt% Ag loaded catalyst (1Ag/MnO2NRs) shows excellent performance in benzyl alcohol oxidation due to its high adsorption capacity, enhanced oxygen vacancies, and redox properties. The designed 1Ag/α-MnO2NRs catalytic system achieves 2.6 times higher activity compared to α-MnO2NRs without Ag decoration. These findings provide insights for the rational design of shape-dependent metal/metal oxide catalysts.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Energy & Fuels
Duygu Kocaefe, Julie Bureau, Armita Rastegari, Karthikeyan Rajan, Yasar Kocaefe
Summary: This study aims to investigate the effect of modifying a pitch containing a high amount of primary quinoline insolubles (HQI pitch) on anode quality. The results showed that adding the appropriate percentage of additive (2%) and using high-quality pitch (16%) improved anode properties. The modified HQI pitch also exhibited better wetting ability on coke.
