A5069055409- Zeolite Catalysis and Synthesis
- Catalysis for Biomass Conversion
- Catalysis and Hydrodesulfurization Studies
- Biofuel production and bioconversion
- Metal-Organic Frameworks: Synthesis and Applications
- Mesoporous Materials and Catalysis
- Bioenergy crop production and management
- Microbial Metabolic Engineering and Bioproduction
- Catalytic Processes in Materials Science
- Genetics and Plant Breeding
- Asymmetric Hydrogenation and Catalysis
- Enzyme Catalysis and Immobilization
- Advanced Neural Network Applications
- Surface Modification and Superhydrophobicity
- Aerodynamics and Fluid Dynamics Research
- Crop Yield and Soil Fertility
- Minerals Flotation and Separation Techniques
- Climate change impacts on agriculture
- Polyoxometalates: Synthesis and Applications
- Agroforestry and silvopastoral systems
- Ship Hydrodynamics and Maneuverability
- Membrane Separation and Gas Transport
- Cyclone Separators and Fluid Dynamics
- Pasture and Agricultural Systems
- Fluid Dynamics and Mixing
Alliance University
2024-2025
Kyushu Institute of Technology
2023-2024
University of Minnesota
2019-2023
University of Minnesota System
2020-2023
Delhi Technological University
2020
Minneapolis Institute of Arts
2020
International Crops Research Institute for the Semi-Arid Tropics
2016-2019
Indian Institute of Technology Roorkee
2016
Butadiene is an important monomer for rubbery and hard polymeric materials, it can be produced efficiently from biomass-derived tetrahydrofuran (THF) using solid-acid zeolite catalysts. In this work, electronic structure calculations, kinetic experiments, microkinetic modeling were applied to investigate the THF dehydra-decyclization reaction butadiene as well its retro-Prins fragmentation side product propene on a Brønsted acid site within H-ZSM5. A comprehensive network consisting of 15...
Phosphorus-modified all-silica zeolites exhibit activity and selectivity in certain Brønsted acid catalyzed reactions for biomass conversion. In an effort to achieve similar performance with catalysts having well-defined sites, we report the incorporation of acidity metal-organic frameworks UiO-66 topology, achieved by attaching phosphonic 1,4-benzenedicarboxylate ligand using it form UiO-66-PO3 H2 post-synthesis modification. Characterization reveals that retains stability UiO-66, exhibits...
The catalytic conversion of biomass-derived furfural to 1,3-butadiene is a potential synthetic route renewable rubber. In this work, we present and evaluate conceptual process design consisting three steps: (i) decarbonylation furan, (ii) hydrogenation furan tetrahydrofuran, (iii) dehydra-decyclization tetrahydrofuran 1,3-butadiene. Detailed reaction separation systems are designed using simulation economic optimization. At scale 77 kton year–1 (100 kmol h–1) purchased at $1.84 kg–1 ($176...
Commonly used methods to assess crystallinity, micro-/mesoporosity, Brønsted acid site density and distribution (in micro- vs. mesopores), catalytic activity suggest nearly invariant structure function for aluminosilicate zeolite MFI two-dimensional nanosheets before after superheated steam treatment. Yet, pronounced reaction rate decrease benzyl alcohol alkylation with mesitylene, a that cannot take place in the micropores, is observed. Transmission electron microscopy images reveal changes...
Abstract Synthesis of a pentasil‐type zeolite with ultra‐small few‐unit‐cell crystalline domains, which we call FDP (few‐unit‐cell domain pentasil), is reported. made using bis‐1,5(tributyl ammonium) pentamethylene cations as structure directing agent (SDA). This di‐quaternary ammonium SDA combines butyl ammonium, in place the one commonly used for MFI synthesis, propyl and five‐carbon nitrogen‐connecting chain, six‐carbon connecting chain SDAs that are known to fit well within pores. X‐ray...
1,3-Pentadiene (piperylene) is an important monomer in the manufacturing of adhesives, plastics, and resins. This study utilizes fundamental insights gained from dehydra-decyclization biomass-derived 2-methyltetrahydrofuran to achieve high piperylene yields.
Improving the yield and quality of sorghum (Sorghum bicolor) forage for livestock feeding is a major breeding objective, because sorghum’s inherently high biomass accumulation, productivity per unit water utilized its ability to produce ratoon crop after harvesting plant crop. Newly bred lines, including 36 lines falling in 5 different categories, i.e. 12 experimental dual-purpose 6 germplasm accessions from ICRISAT collection, 11 commercial varieties hybrids, 1 bmr mutant line, were...
The acid sites of phosphorus-containing zeosils were probed through a combination solid characterization, density functional theory calculations, and kinetic interrogations, establishing their weakly Brønsted-acidic character. Because the disparity in acid-site strength, P-zeosils catalyzed probe chemistry isopropanol dehydration slower than aluminosilicate zeolites by an order magnitude on active-site basis. Propene selectivity during remained 20–30% higher that aluminosilicates,...
Co-feeding an inert and site-selective chemical titrant provides desirable selectivity tuning when adsorption is favored over side reaction pathways on a solid acid catalyst. Here, enhancement from 61 to 84 C % was demonstrated for methyl lactate dehydration acrylate acrylic NaY zeolite catalyst using amines as the co-fed titrants suppress reactions in situ-generated Brønsted sites (BASs). The effectiveness of BAS titration evaluated by considering both basicity steric properties molecule...
Biomimetic-inspired surfaces have the potential to enhance water transport efficiency, as channels with hierarchical micro/nanoscale structures demonstrate improved capillary flow characteristics.The applicability of classical Lucas-Washburn equation for capillary-driven in open rectangular microchannels has been debated, and its validity remains uncertain.In this study, numerical simulations using Volume-of-fluidbased OpenFOAM were used examine effect rib angle microchannels, focusing on...
Abstract Synthesis of a pentasil‐type zeolite with ultra‐small few‐unit‐cell crystalline domains, which we call FDP (few‐unit‐cell domain pentasil), is reported. made using bis‐1,5(tributyl ammonium) pentamethylene cations as structure directing agent (SDA). This di‐quaternary ammonium SDA combines butyl ammonium, in place the one commonly used for MFI synthesis, propyl and five‐carbon nitrogen‐connecting chain, six‐carbon connecting chain SDAs that are known to fit well within pores. X‐ray...
Abstract Commonly used methods to assess crystallinity, micro‐/mesoporosity, Brønsted acid site density and distribution (in micro‐ vs. mesopores), catalytic activity suggest nearly invariant structure function for aluminosilicate zeolite MFI two‐dimensional nanosheets before after superheated steam treatment. Yet, pronounced reaction rate decrease benzyl alcohol alkylation with mesitylene, a that cannot take place in the micropores, is observed. Transmission electron microscopy images...
ow in open rectangular microchannels. Meanwhile, there is no guarantee that the Lucas–Washburn equation valid for capillary-driven flow hierarchical Here, we perform 3D numerical simulations using OpenFOAM Volume-of-Fluid method to predict of water a closed microchannel. It found imbibition rate increased microchannel, and mean shows dependence on height minor channel. Consequently, an optimized channel geometry has been proposed improve capillary
Abstract Phosphorus‐modified all‐silica zeolites exhibit activity and selectivity in certain Brønsted acid catalyzed reactions for biomass conversion. In an effort to achieve similar performance with catalysts having well‐defined sites, we report the incorporation of acidity metal–organic frameworks UiO‐66 topology, achieved by attaching phosphonic 1,4‐benzenedicarboxylate ligand using it form UiO‐66‐PO 3 H 2 post‐synthesis modification. Characterization reveals that retains stability...
CFD =Computational