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Methanation --- Synthesis gas --- Congresses --- Chemistry --- Chemical & Materials Engineering --- Engineering & Applied Sciences --- Physical Sciences & Mathematics --- Chemical Engineering --- Chemistry - General --- 665.72 <063> --- -Synthesis gas --- Syngas --- Carbon monoxide --- Fuel --- Hydrogen --- Water-gas --- Fischer-Tropsch process --- Hydrogenation --- Gases (including liquefied gases)--Congressen --- Congresses. --- 665.72 <063> Gases (including liquefied gases)--Congressen --- Catalysis --- Fuel gases

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This reprint contains contributions focusing on recent developments in the design, synthesis, and characterization of nanocatalysts intended for applications in environmental protection and low carbon footprint power generation processes thanks to the overall effort of scientists and researchers for a cleaner and more sustainable future. New synthetic approaches to the production and in-depth characterization of innovative nanostructured composites and hybrid materials with well-controlled textural and surface chemistry properties that give performance advantages in a variety of important environmental and energy applications such as CO2 utilization/recycling, hydrogen and syngas production, biosensing, and biocatalysis as well as in ways to obtain useful materials from waste are included, among others. This reprint is the result of one of the cutting-edge Special Issues in the field of Nanoscience and Nanotechnology organized by Nanomaterials to celebrate its 10th anniversary.

nanocarbon --- rocket fuels --- furfuryl alcohol --- fuming nitric acid --- waste --- hypergolics --- carbon materials --- CO2 methanation --- bimetallic catalysts --- Ni-based catalysts --- promoters --- alloy nanoparticles --- bimetallic synergy --- hybrid nanoflowers --- biosynthesis --- influencing factors --- biosensing cues --- bio-catalysis --- propane --- steam reforming --- hydrogen production --- perovskite --- ruthenium --- rhodium --- La2O2CO3 --- stability --- propane steam reforming --- H2 production --- Ni --- TiO2 --- CeO2 --- YSZ --- ZrO2 --- Al2O3 --- drifts --- n/a --- HDO reaction --- transition metal phosphides --- structure --- acidity --- characterization

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For a sustainable future, the need to use renewable sources to produce electricity is inevitable. Some of these sources—particularly the widely available solar power—are weather-dependent; therefore, utility-scale energy storage will be more and more important. These solar and wind power fluctuations range from minutes (passing cloud) to whole seasons (winter/summer differences). Short-term storage can be solved (at least theoretically) with batteries; however, seasonal storage—due to the amount of storable energy and the self-discharging of some storage methods—is still a challenge to be solved in the near future. We believe that biological Power-to-Methane technology—especially combined with biogas refinement—will be a significant player in the energy storage market within less than a decade. The technology produces high-purity methane, which can be considered—by using green energy and carbon dioxide of biological origin—as a Renewable Natural Gas, or RNG. The ease of storage and use of methane, as well as the effective carbon-freeness, can make it a competitor for batteries or hydrogen-based storage, especially for storage times exceeding several months.

seasonal energy storage --- power-to-methane --- wastewater treatment plants --- techno-economic assessment --- power-to-gas --- regulation --- energy storage --- biogas --- biomethane --- disruptive technology --- decarbonization --- innovation --- Power-to-Gas --- Power-to-Fuel --- P2M --- P2G --- P2F --- biomethanization --- biomethanation --- competitiveness --- hydrogen utilization --- Hungary --- Power-to-X --- Power-to-Hydrogen --- Power-to-Methane --- hydrogen --- methanation --- sector coupling --- sectoral integration --- energy transition --- eFuels --- electric fuels --- 100% renewable energy scenarios --- thermophilic biogas --- fed-batch reactor --- Methanothermobacter --- metagenome --- starvation --- H2 and CO2 conversion --- methane --- acetate --- n/a

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This reprint is devoted to “greener catalysis for environmental applications”, and primarily covers the catalytic synthesis of value-added chemicals, as well as the catalytic removal of pollutants. The most important topics covered were the conversion of waste to the product, solvent-free conditions as well as toxicity assessment of the reaction products.

selectivity tuning --- CO2 methanation --- reverse water gas shift --- photocatalysis --- dye --- UV --- peroxydisulfate --- advanced oxidation process --- Fischer-Tropsch --- jet fuel --- gasoline --- CoMn --- hydrotalcite-like precursors --- heterogeneous catalysis --- montmorillonite --- benzimidazoles --- gallium --- vanadium --- hydrodesulfurization --- hydrogenation --- synthesis method --- catalysis --- zero valent iron --- de-chlorination --- borohydride --- sol-gel --- ferromagnetic --- glycine–nitrate process --- copper-based nanoparticles --- photocatalysis activity --- NP9EO --- Fenton degradation --- ofloxacin --- Fe3O4 --- zeolite --- heterogeneous --- ion exchange resins --- waste cooking oil --- reuse of catalyst --- epoxidation --- Circular Economy --- contaminants of emerging concern --- advanced oxidation processes --- by-products --- n/a --- glycine-nitrate process

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This Special Issue on “New Trends in Catalysis for Sustainable CO2 Conversion”, released in the Catalysts open access journal, shows new research about the development of catalysts and catalytic routes for CO2 valorization, in addition to the optimization of the reaction conditions for the process. This issue includes ten articles and three reviews about different innovative processes for CO2 conversion.Carbon capture and storage (CCS) is a physical process consisting of the separation the CO2 (emitted by industry and the combustion processes for energy generation) and its transportation to geological storage isolates it from the atmosphere in the long term. However, the most promising routes for CO2 mitigation are those pursuing its catalytic valorization. By applying specific catalysts and suitable operating conditions, CO2 molecules react with other components to form longer chains (i.e., hydrocarbons). Accordingly, effort should be made to catalytically valorize CO2 (alone or co-fed with syngas) as an alternative way of reducing greenhouse gas emissions and obtaining high-value fuels and chemicals. Carbon capture and utilization (CCU) is a developing field with significant demand for research in the following aspects:The development of new catalysts, catalytic routes, and technologies for CO2 conversion;The study of new processes for obtaining fuels and chemicals from CO2;Optimization of the catalysts and the reaction conditions for these processes;Further steps in advanced processes using CO2-rich feeds (H2+CO2 or CO2 mixed with syngas), increasing product yields.

Technology: general issues --- History of engineering & technology --- Environmental science, engineering & technology --- carbon dioxide --- hydrogenation --- catalyst --- gas hourly space velocity (GHSV) --- fixed-bed reactor --- CO2–H2O photo-co-processing --- VIS-light driven reactions --- CO2 reduction --- photocatalysts properties --- soft oxidant --- oxidation --- dehydrogenation --- nano-catalyst --- electrochemical reduction of CO2 --- ionic liquids --- propylene carbonate --- imidazolium cation --- greenhouse gas --- climate change --- CO2 decomposition --- CO2 utilization --- SrFeO3−x --- CO2 methanation --- Ni-xSi/ZrO2 --- Si promotion --- oxygen vacancies --- CO2 hydrogenation --- light olefins --- catalyst deactivation --- CO2-Fischer-Tropsch (CO2-FT) --- iron-based catalysts --- methanol to olefins --- bifunctional composite catalysts --- SAPO-34 --- photocatalysis --- carbon-TiO2 --- nanocarbon --- carbon allotropes --- carbon nanotubes --- carbon nanofibers --- carbon nano-onions --- carbon dioxide electrolysis --- molten carbonate --- greenhouse gas mitigation --- cycloaddition --- ionic liquid --- deep eutectic solvents --- onium salt --- homogeneous catalysts --- heterogeneous catalysis --- CO2 conversion --- methane --- hydrocarbons --- iron oxide --- copper nanoparticles --- biomass --- Fischer–Tropsch synthesis --- carbon-supported iron catalyst --- gasoline --- diesel --- n/a --- CO2-H2O photo-co-processing --- Fischer-Tropsch synthesis