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This eBook is a collection of articles from a Frontiers Research Topic. Frontiers Research Topics are very popular trademarks of the Frontiers Journals Series: they are collections of at least ten articles, all centered on a particular subject. With their unique mix of varied contributions from Original Research to Review Articles, Frontiers Research Topics unify the most influential researchers, the latest key findings and historical advances in a hot research area! Find out more on how to host your own Frontiers Research Topic or contribute to one as an author by contacting the Frontiers Editorial Office: frontiersin.org/about/contact

aromatics --- shikimate pathway --- natural products --- metabolic engineering --- degradation

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This eBook is a collection of articles from a Frontiers Research Topic. Frontiers Research Topics are very popular trademarks of the Frontiers Journals Series: they are collections of at least ten articles, all centered on a particular subject. With their unique mix of varied contributions from Original Research to Review Articles, Frontiers Research Topics unify the most influential researchers, the latest key findings and historical advances in a hot research area! Find out more on how to host your own Frontiers Research Topic or contribute to one as an author by contacting the Frontiers Editorial Office: frontiersin.org/about/contact

Civil engineering, surveying & building --- Biotechnology --- aromatics --- shikimate pathway --- natural products --- metabolic engineering --- degradation

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In the last decades, inedible lignocellulosic biomasses have attracted significant attention for being abundant resources that are not in competition with agricultural land or food production and, therefore, can be used as starting renewable material for the production of a wide variety of platform chemicals. The three main components of lignocellulosic biomasses are cellulose, hemicellulose and lignin, complex biopolymers that can be converted into a pool of platform molecules including sugars, polyols, alchols, ketons, ethers, acids and aromatics. Various technologies have been explored for their one-pot conversion into chemicals, fuels and materials. However, in order to develop new catalytic processes for the selective production of desired products, a complete understanding of the molecular aspects of the basic chemistry and reactivity of biomass derived molecules is still crucial. This Special Issue reports on recent progress and advances in the catalytic valorization of cellulose, hemicellulose and lignin model molecules promoted by novel heterogeneous systems for the production of energy, fuels and chemicals.

n/a --- hemicellulose --- catalytic transfer hydrogenolysis reactions --- furfural --- ZSM-5 --- syngas --- renewable aromatics --- Diels–Alder --- lignin --- hydroisomerization --- levulinic acid --- bio-oil upgrade --- metal ferrites --- aromatic ethers --- hierarchical zeolites --- Chilean natural zeolites --- bioethanol --- renewable p-xylene --- desilication --- dimethylfuran --- GC/MS characterization --- biomass --- H-donor molecules --- heterogeneous catalysis --- polyols --- Brønsted acids sites --- spinels --- solketal --- glycerol --- chemical-loop reforming --- zeolite --- cellulose --- insulating oils --- hydrogenolysis --- lignocellulosic biomasses --- bio-insulating oil --- glycidol --- Diels-Alder

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Recently, there has been a growing awareness of the need to make better use of natural resources. Hence, the utilization of biomass has led to so-called biorefinery, consisting of the fractionation or separation of the different components of the lignocellulosic materials in order to achieve a total utilization of the same, and not only of the cellulosic fraction for paper production. The use of plant biomass as a basic raw material implies a shift from an economy based on the exploitation of non-renewable fossil fuels, with limited reserves or with regeneration cycles far below the rates of exploitation, to a bioeconomy based on the use of renewable organic natural resources, with balanced regeneration and extraction cycles. To make this change, profound readjustments in existing technologies are necessary, as well as the application of new approaches in research, development, and production."Biorefinery" is the term used to describe the technology for the fractionation of plant biomass into energy, chemicals, and consumer goods. The future generation of biorefinery will include treatments, leading to high-value-added compounds. The use of green chemistry technologies and principles in biorefineries, such as solvent and reagent recovery and the minimization of effluent and gas emissions, is essential to define an economically and environmentally sustainable process.In particular, the biorefinery of lignocellulosic materials to produce biofuels, chemicals and materials is presented as a solid alternative to the current petrochemical platform and a possible solution to the accumulation of greenhouse gases.

Research & information: general --- lignocellulosic biomass --- solid-state fermentation --- enzymatic hydrolysis --- aerated bioreactor --- Aspergillus oryzae --- lignin --- lignocellulose --- aromatics --- biobased --- epoxy --- fatty acid --- biopolymers --- biobased materials --- biorenewable --- bio-based filament --- 3D printing --- sugarcane bagasse pulp --- barley straw --- composite --- flexural strength --- biobased polyethylene --- nanocellulose --- β-cyclodextrin --- cryogels --- films --- biomaterials --- cellulose --- dialdehyde cellulose --- organosilane chemistry --- 29Si NMR --- solid state NMR --- silanization --- lignocellulose valorization --- 'lignin-first' --- reductive catalytic fractionation --- lignocellulose nanofibers --- horticultural residues --- paperboard --- recycling --- biosurfactants --- enzymatic saccharification --- fermentation --- quinoa saponins --- steam-pretreated spruce --- lignocellulosic material --- xylose --- furfural --- iron chloride --- microwave reactor --- biorefinery --- electrosynthesis --- biomass --- carbohydrate --- saccharides --- electro-oxidation --- electroreduction --- residue --- agro-industry --- high-value products --- banana --- torrefaction --- Jerusalem artichoke --- biofuel --- energy crops --- agiculture --- micro-fibrillated cellulose --- formaldehyde adhesives --- wood-based panels --- kraft lignin --- adsorbent material --- copper adsorption --- H2S adsorption --- H2S removal --- lignocellulosic biomass --- solid-state fermentation --- enzymatic hydrolysis --- aerated bioreactor --- Aspergillus oryzae --- lignin --- lignocellulose --- aromatics --- biobased --- epoxy --- fatty acid --- biopolymers --- biobased materials --- biorenewable --- bio-based filament --- 3D printing --- sugarcane bagasse pulp --- barley straw --- composite --- flexural strength --- biobased polyethylene --- nanocellulose --- β-cyclodextrin --- cryogels --- films --- biomaterials --- cellulose --- dialdehyde cellulose --- organosilane chemistry --- 29Si NMR --- solid state NMR --- silanization --- lignocellulose valorization --- 'lignin-first' --- reductive catalytic fractionation --- lignocellulose nanofibers --- horticultural residues --- paperboard --- recycling --- biosurfactants --- enzymatic saccharification --- fermentation --- quinoa saponins --- steam-pretreated spruce --- lignocellulosic material --- xylose --- furfural --- iron chloride --- microwave reactor --- biorefinery --- electrosynthesis --- biomass --- carbohydrate --- saccharides --- electro-oxidation --- electroreduction --- residue --- agro-industry --- high-value products --- banana --- torrefaction --- Jerusalem artichoke --- biofuel --- energy crops --- agiculture --- micro-fibrillated cellulose --- formaldehyde adhesives --- wood-based panels --- kraft lignin --- adsorbent material --- copper adsorption --- H2S adsorption --- H2S removal

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Microporous zeolites and nanoporous materials are important from an academic and industrial research perspective. These inorganic materials have found application as catalysts in several industrial processes in oil refinery, petro-chemical reactions, fine chemicals, speciality, drug discovery and pharmaceutical synthesis, exhaust emission control for stationary and mobile engines and industrial wastewater treatment. The reasons for their versatile applications in several industrial processes are their unique properties of microporous zeolites and nanoporous materials such as uniform pores, channel systems, shape selectivity, resistance to coke formation, thermal and hydrothermal stability. Furthermore, the possibility to tune the amount and strength of Brønsted and Lewis acid sites and their crystal size, as well as the possibility of modification with transition and noble metals, are key to their success as efficient, high selectivity and stable catalysts.

Technology: general issues --- Chemical engineering --- zeolitic imidazolate frameworks --- Zn-Co@N-doped carbon --- transesterification --- Ti-CFI --- Ti-CIT-5 --- extra-large-pore --- zeolites --- fluorides --- titanosilicates --- oxidation --- generalized macro-transport theory --- adsorbent and non-adsorbent membranes --- bulk and surface diffusion --- heterogeneous catalysis --- mass transfer and effectiveness factor --- mesoporous H-ZSM-5 --- methanol-to-olefin (MTO) --- propylene --- acid sites density --- operando UV-vis spectroscopy --- CO2 assisted dehydrogenation --- isobutane --- silicalite-1 --- SBA-15 --- carbamazepine --- ozone --- catalysts synthesis and characterization --- catalytic ozonation --- isosorbide --- solid acid catalyst --- sorbitol --- dehydration --- bisphenol A --- diclofenac --- heterogeneous catalyst --- catalyst characterization --- advanced oxidation processes --- methanol to aromatics --- para-xylene --- selectivity --- phosphorous modified ZSM-5 --- advanced oxidation process --- catalyst preparation --- wastewater treatment --- interzeolite conversion method --- CHA-type zeolite --- LTL-type zeolite --- crystallization mechanism --- MTO reaction --- α-Pinene oxide --- campholenic aldehyde --- trans-carveol --- isomerization --- MoO3-zeolite BETA --- n/a