A5004604778- Catalysis for Biomass Conversion
- Lignin and Wood Chemistry
- Biofuel production and bioconversion
- Advanced Cellulose Research Studies
- Catalysis and Hydrodesulfurization Studies
- Polyoxometalates: Synthesis and Applications
- Mesoporous Materials and Catalysis
- Enzyme-mediated dye degradation
- Catalytic Processes in Materials Science
- Chemical Synthesis and Reactions
- Fermentation and Sensory Analysis
- Catalysis and Oxidation Reactions
- Nonlinear Photonic Systems
- Manufacturing Process and Optimization
- Zeolite Catalysis and Synthesis
- Advanced Fiber Laser Technologies
- Microbial Metabolic Engineering and Bioproduction
- Free Radicals and Antioxidants
- Biochemical and biochemical processes
- Synthesis and Characterization of Heterocyclic Compounds
- Catalysts for Methane Reforming
- Photorefractive and Nonlinear Optics
- Synthesis and biological activity
- Solid-state spectroscopy and crystallography
- Chemical Thermodynamics and Molecular Structure
Imperial College London
2015-2023
Azienda Socio Sanitaria Territoriale degli Spedali Civili di Brescia
2022
Transnational Press London
2018
Sapienza University of Rome
2003-2017
University of Naples Federico II
2016
Max-Planck-Institut für Kohlenforschung
2007-2016
Stockholm Environment Institute
2016
University of York
2016
Max Planck Society
2006-2015
Ruhr West University of Applied Sciences
2014-2015
Small and medium-sized enterprises (SMEs) are increasingly aware of the benefits closing loops improving resource efficiency, such as saving material costs, creating competitive advantages, accessing new markets. At same time, however, various barriers pose challenges to small businesses in their transition a circular economy, namely lack financial resources technical skills. The aim this paper is increase knowledge understanding about enablers experienced by SMEs when implementing economy...
The discovery and investigation of novel efficient pathways for the conversion biomass into fuels chemicals are among big challenges facing heterogeneous catalysis nowadays. However, not all experience gained in transformation hydrocarbons over last 100 years can directly be transferred to conversion. In this article, we will discuss how specific properties pose new requirements on processes solids that used as catalysts their Due importance lignocellulosic materials, which constitute ca....
With these guidelines, we aim to unite the lignin-first biorefining research field around best practices for performing or reporting feedstock analysis, reactor design, catalyst performance, and product yields.
Wood you believe it! Solid acids act as powerful catalysts for the hydrolysis of cellulose dissolved in an ionic liquid. Cellulose undergoes selective depolymerization, yielding oligomers (cellooligomers) without any substantial formation side products. Even wood, a lignocellulosic material, is hydrolyzed using this methodology. Supporting information article available on WWW under http://www.wiley-vch.de/contents/jc_2002/2008/z802879_s.pdf or from author. Please note: The publisher not...
Abstract Through catalytic hydrogen transfer reactions, a new biorefining method results in the isolation of depolymerized lignin—a non‐pyrolytic lignin bio‐oil—in addition to pulps that are amenable enzymatic hydrolysis. Compared with organosolv lignin, bio‐oil is highly susceptible further hydrodeoxygenation under low‐severity conditions and therefore establishes unique platform for valorization by heterogeneous catalysis. Overall, potential designed from perspective utilization reported.
Abstract The conversion of lignin, the most recalcitrant biopolymers, is necessary for a carbon‐efficient utilization lignocellulosic materials. In this context, hydrogenolysis lignin process receiving increasing attention. report, solvent effects on diphenyl ether and with Raney Ni are addressed. Lewis basicity very much affects catalytic activity, so in nonbasic solvents an extremely active catalyst hydrogenation. basic solvents, however, less active, but more selective while preserving...
Herein a novel class of solvent systems for cellulose is introduced. Surprisingly, organic electrolyte solutions, which contain just small molar fraction ionic liquid, dissolve instantaneously large amounts cellulose. The solvation properties the systems, required dissolving polymer, are discussed here.
Finding a workaround: The conversion of lignin into low-boiling-point arenes instead high-boiling-point phenols could greatly facilitate conventional refinery processes. A new procedure for the depolymerization and simultaneous is described. method can also be rendered as fundamental finding upgrade bio-oils to under mild conditions.
This paper focuses on the fundamental chemical aspects of hydrogen transfer reactions with RANEY® Ni and propan-2-ol. It aims at novel process options for defunctionalization hydrodeoxygenation phenolic aromatic biorefinery feeds under low-severity conditions. A series 32 model substrates were explored, providing a comprehensive description reactivity toward hydrogenation hydrogenolysis. In addition, related to catalyst stability addressed in detail. With regard processing model-substrate...
Abstract The use of cellulose is hampered by difficulties with breaking up the biopolymer into soluble products. Herein, we show that impregnation cellulosic substrates catalytic amounts a strong acid (e.g., H 2 SO 4 , HCl) highly effective strategy for minimizing contact problem commonly experienced in mechanically assisted, solid‐state reactions. Milling acid‐impregnated fully converts substrate water‐soluble oligosaccharides within h. In aqueous solution, products are easily hydrolyzed at...
Context & ScaleHeterogeneous catalysis is no longer limited to the conversion of lignin wastes from cellulosic-centric industries, but has expanded offer innovative solutions for deconstruction lignocellulose by reductive processes. Such are referred as lignin-first biorefining. They highly efficient at preventing generation recalcitrance in streams while yielding delignified pulps. Herein, a lignin-centered convergent approach rendering two main cuts branched hydrocarbons (gasoline: C6-C10,...
Abstract Hydrodeoxygenation (HDO) is an attractive route for the upgrading of bio‐oils produced from lignocellulose. Current catalysts require harsh conditions to effect HDO, decreasing process efficiency in terms energy and carbon balance. Herein we report a novel facile method synthesizing bimetallic PtCo nanoparticle (ca. 1.5 nm) highly dispersed framework nitrogen‐doped ordered mesoporous (NOMC) this reaction. We demonstrate that NOMC with either 2D hexagonal ( p 6 m ) or 3D cubic Im...
Reductive catalytic fractionation (RCF) is a promising approach to fractionate lignocellulose and convert lignin narrow product slate. To guide research towards commercialization, cost sustainability must be considered. Here we report techno-economic analysis (TEA), life cycle assessment (LCA), air emission of the RCF process, wherein biomass carbohydrates are converted ethanol oil lignin-derived product. The base-case using feedstock supply 2000 dry metric tons per day, methanol as solvent, H
A catalytic system capable of reaching high performance in the hydrogenolysis cellulose at low reaction temperature and short times has been developed. Therefore, supported noble metal catalysts based on Pt, Pd Ru have combined with dilute mineral acids. broad variable set terms type metal, acid, acid concentration time could be evaluated chemical interpretation by a Design Experiment (DoE) approach. The variables significantly influenced conversion cellulose, product range selectivity...
Photorefractive screening-photovoltaic solitons are observed in lithium niobate. Two-dimensional bright circular formed thanks to a strong static bias field, externally applied, opposite the photovoltaic internal field. The dynamics of soliton formation is monitored and compared time-dependent numerical model allowing determination Efficient single mode waveguides shown be memorized by beam for long time.
Cellulose is a renewable and widely available feedstock. It biopolymer that typically found in wood, straw, grass, municipal solid waste, crop residues. Its use as raw material for biofuel production opens up the possibility of sustainable biorefinery schemes do not compete with food supply. Tapping into this feedstock biofuels chemicals requires--as first-step--its depolymerization or its hydrolysis intermediates are more susceptible to chemical and/or biological transformations. We have...
The long-term thermal stability of imidazolium-based ionic liquids is addressed here. We have found that potentiometric titration a precise, low-cost and quick analytical method to assess the quality changes occurring during aging liquids. Using this protocol, we discovered start decompose, small extent, at much lower temperatures than those inferred from thermogravimetric analysis.
Abstract Lignin ist ein reichlich vorhandenes Biopolymer mit hohem Kohlenstoffgehalt und hoher Aromatizität. Trotz seines Potenzials als Rohstoff für die Kraftstoffherstellung chemische Industrie noch immer das am wenigsten genutzte der Lignocellulose. Zur effektiven Aufwertung von eine sorgfältige Feinabstimmung mehrerer vorgeschalteter Prozessstufen (d. h. Biotechnik Lignin, Abtrennung katalytische Umwandlung in Anfangsphase) nachgeschalteter Depolymerisation Verwertung Lignin)...
Cellulose is both insoluble in water and resistant against hydrolysis. These features pose major problems for its conversion into platform chemicals. Herein, we demonstrate that mechanocatalytic, solid-state depolymerization combined with hydrogenolysis, the presence of Ru/C water, provides a highly efficient pathway production sugar alcohols. This novel approach leads to yields hexitols up 94% at 150 °C an overall process time 4 h.
Driven by mechanical forces, the acid-catalyzed depolymerization of solid biomass completely overcomes problems posed recalcitrance lignocellulose. The solid-state reaction leads to water-soluble oligosaccharides, which display higher reactivity than cellulose and hemicellulose. Here, we show that oligosaccharides are useful feedstock for high-yield production 5-hydroxymethylfurfural (HMF) furfural in biphasic reactors. This is because they readily undergo hydrolysis upon microwave heating,...
Editorial article to accompany the <italic>Green Chemistry</italic> themed issue ‘Lignin Chemistry and Valorisation’.
Abstract Through catalytic hydrogen transfer reactions, a new biorefining method results in the isolation of depolymerized lignin—a non‐pyrolytic lignin bio‐oil—in addition to pulps that are amenable enzymatic hydrolysis. Compared with organosolv lignin, bio‐oil is highly susceptible further hydrodeoxygenation under low‐severity conditions and therefore establishes unique platform for valorization by heterogeneous catalysis. Overall, potential designed from perspective utilization reported.