A5046743032- Biofuel production and bioconversion
- Crystallization and Solubility Studies
- Lignin and Wood Chemistry
- Catalysis for Biomass Conversion
- X-ray Diffraction in Crystallography
- Ionic liquids properties and applications
- Enzyme-mediated dye degradation
- Microbial Metabolic Engineering and Bioproduction
- Crystallography and molecular interactions
- Biochemical and biochemical processes
- Chemistry and Chemical Engineering
- Catalytic Processes in Materials Science
- Mesoporous Materials and Catalysis
- Catalysis and Hydrodesulfurization Studies
- Extraction and Separation Processes
- Inorganic and Organometallic Chemistry
- Chemical Synthesis and Reactions
- Innovative concrete reinforcement materials
- Catalysis and Oxidation Reactions
- biodegradable polymer synthesis and properties
- Sugarcane Cultivation and Processing
- Recycled Aggregate Concrete Performance
- Carbon dioxide utilization in catalysis
- Nanocomposite Films for Food Packaging
- Water Quality Monitoring and Analysis
Sandia National Laboratories California
2021-2025
Joint BioEnergy Institute
2021-2025
Maulana Azad National Institute of Technology
2023-2024
Lawrence Berkeley National Laboratory
2022-2023
University of Alabama
2018-2022
McGill University
2017-2021
Tuscaloosa City Schools
2018
Japan Advanced Institute of Science and Technology
2012-2017
Indraprastha Apollo Hospitals
2011
Abstract A new approach is developed for hydrogenolytic ring opening of biobased 5‐hydroxymethylfurfural (HMF), dehydration product hexoses, towards 1,6‐hexanediol (HDO) under atmospheric pressure. The highest yield HDO, 43 %, achieved over reusable Pd/zirconium phosphate (ZrP) catalyst at 413 K in the presence formic acid as hydrogen source. In comparison with various Brønsted and/or Lewis acidic supports, specific acidity on ZrP support effectively accelerated cleavage CO bond a furan ring.
Abstract Lignocellulose forms plant cell walls, and its three constituent polymers, cellulose, hemicellulose lignin, represent the largest renewable organic carbon pool in terrestrial biosphere. Insights into biological lignocellulose deconstruction inform understandings of global sequestration dynamics provide inspiration for biotechnologies seeking to address current climate crisis by producing chemicals from biomass. Organisms diverse environments disassemble lignocellulose, carbohydrate...
Abstract Green oxidation of inedible biomass-based 2-furaldehyde (furfural) to succinic acid (SA), one the most important building blocks, was successfully achieved using Amberlyst-15 as a reusable solid catalyst in water at 353 K presence hydrogen peroxide (H2O2).
Herbicidal ionic liquids (HILs) have been demonstrated to potential as highly effective herbicides that may also different modes of action their neutral precursors. Here, double salt herbicidal (DSHILs) containing at least two anions selected from glyphosate, dicamba, or 4-chloro-2-methylphenoxyacetate (MCPA) paired with ammonium phosphonium cations are reported along post-emergence activity against several plant species, both greenhouse and field study-based bioassays. The novel DSHILs were...
Maximizing the production of heterologous biomolecules is a complex problem that can be addressed with systems-level understanding cellular metabolism and regulation. Specifically, growth-coupling approaches increase product titers yields also enhance rates. However, implementing these methods for non-canonical carbon streams challenging due to gaps in metabolic models. Over four design-build-test-learn cycles, we rewire Pseudomonas putida KT2440 growth-coupled indigoidine from...
The aerobic oxidation of 5-hydroxymethylfurfural (HMF) to 2,5-furandicarboxylic acid (FDCA) was investigated over hydrotalcite (HT)-supported various catalysts composed PVP-capped Au, Pd, or Pt....
In the design of stronger chitin fibers reinforced with poly(lactic acid) (PLA), an ionic-liquid-based (IL-based) approach was developed in which both polymers were codissolved 1-ethyl-3-methylimidazolium acetate ([C2mim][OAc]) and wet-jet spun into composite fibers. Chitin, directly extracted from shrimp shell, had a solubility IL 2.75 wt %, while PLA MW 700 000 g/mol 49 %. Keeping saturated chitin, homogeneous solutions could be obtained up to 27 % (relative IL) PLA. Spinning dopes...
The ability of the ionic liquid (IL) 1-ethyl-3-methylimidazolium acetate ([C2mim][OAc]) to solubilize natural biopolymers (e.g., chitin and cellulose) without any chemical modification has been used develop a one-pot process prepare spinning dope by extracting from shrimp shell, codissolving microcrystalline cellulose (MCC, DP = 270), electrospinning nanomats shell-extract/MCC solutions. resulting dopes were prepared with optimal viscosity 380 900 cP, conductivity surface tension ∼2.8 mS/cm...
Herein we report the dissolution mechanism of lignin in cholinium-based ionic liquids by molecular dynamics simulations. Multiple hydrogen bonds, longer HB lifetimes, and higher p K a [Ch][Lys] makes it better solvent for than acidic ILs.
Systematic approach for predicting lignin extraction and studying mechanistic effects using computational chemistry experimental correlations.
Designed organic–inorganic hybrid material, named as Pd/AZC, demonstrated stable and viable catalysis for important organic transformations.
Formic acid (FA) can be synthesized from monosaccharides such as glucose, galactose, xylose, arabinose and lyxose by using both calcined Mg-Al hydrotalcite a solid catalyst aqueous H2O2 an oxidant in ethanol solvent at 343 K for 5 h. For the glucose oxidation, FA yield utilization efficiency reach 78% 100%, respectively. The used easily separated reaction mixture is reusable least twice.
Over the last few decades, efforts to transition global production of fuels and chemicals toward renewable carbon feedstocks have accelerated. A large portion these focused on valorization one most abundant sources, lignocellulose. Pretreatment lignocellulose is first critical step in this process. In study, novel ionic liquid (IL) systems consisting multiple ions known be effective at biomass pretreatment were tested woody grassy biomass. Molecular simulations experimental results...
The efficient utilization of lignin, the direct source renewable aromatics, into value-added chemicals is an important step towards sustainable biorefinery practices. Nevertheless, owing to random heterogeneous structure and limited solubility, lignin has been primarily burning for energy. catalytic depolymerization proposed demonstrated as a viable route biorefinery, however, low yields poor selectivity products, high char formation, no recycling transition-metal-based catalyst involved in...
Laccases from white-rot fungi catalyze lignin depolymerization, a critical first step to upgrading valuable biodiesel fuels and chemicals. In this study, wildtype laccase the basidiomycete Fomitiporia mediterranea (Fom_lac) variant engineered have carbohydrate-binding module (Fom_CBM) were studied for their ability cleavage of β-O-4' ether C-C bonds in phenolic non-phenolic dimers using nanostructure-initiator mass spectrometry-based assay. Fom_lac Fom_CBM bond breaking, with higher activity...
Aqueous oxidative deconstruction of low-density polyethylene (LDPE) using homogeneous first-row transition metal catalysts under mild conditions (130–150 °C and 100 PSI oxygen pressure).
We present a method for depolymerization of poplar lignin microbial conversion via sulfonation and Fenton chemistry.