Catalyst Synthesis and Characterization

Basrur, A. G.; Sabde, D. P.

doi:10.1016/b978-0-12-801457-8.00004-5

Cited by 3 publications

(5 citation statements)

References 89 publications

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“…The use of larger-sized shaped supports, such as monoliths, extrudates and porous beads prepared frequently from materials such as alumina, silica, polymers and carbon are used to manage these issues with the active species often anchored to the support. 8,9 As well as packing regularly enough to prevent a large pressure drop across the reactor, catalyst supports that are resistant to both crushing and abrasion when inside of the reactor are desirable to avoid breakdown and plug formation. These mechanical considerations are balanced with the requirement of maximising the surface area of the active component of the catalysts and immobilising this species to the support in a manner that ensures sufficient stability for longterm industrial operation (e.g.…”

Section: Introductionmentioning

confidence: 99%

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MOF-based heterogeneous catalysis in continuous flow via incorporation onto polymer-based spherical activated carbon supports

Griffiths,

Boyall,

Müller

et al. 2023

Nanoscale

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

MOF-based heterogeneous catalysis in continuous flow via incorporation onto polymer-based spherical activated carbon supports

Griffiths,

Boyall,

Müller

et al. 2023

Nanoscale

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“…Cuanto mayor es la temperatura de desorción, más fuerte es la adsorción. Los picos agudos indican la homogeneidad de la energía superficial, mientras que los picos amplios difusos o los picos múltiples indican la heterogeneidad de la energía superficial en el catalizador (Basrur y Sabde, 2016).…”

Section: Figura a 1 Esquema De Los Componentes Del Microscopio Electr...unclassified

“…La TPD de amoníaco se usa ampliamente para determinar la acidez de los catalizadores. La temperatura máxima de desorción se usa cualitativamente para describir la fuerza relativa de adsorción/fuerza de los sitios ácidos y el área bajo la curva como una medida de la cantidad de acidez que se expresa en mmol NH 3 /g de catalizador (Basrur y Sabde, 2016).…”

Section: Figura a 1 Esquema De Los Componentes Del Microscopio Electr...unclassified

“…Este gráfico proporciona información sobre la temperatura de reducción máxima y si la reducción tiene lugar como un evento único o múltiple. Un software reduce la señal del detector para determinar el área debajo de los picos individuales que se pueden usar para determinar la cantidad de hidrógeno consumido por el evento representado por ese pico (Basrur y Sabde, 2016).…”

Section: Figura a 1 Esquema De Los Componentes Del Microscopio Electr...unclassified

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Conversión de CO₂ a metanol mediante hidrogenación catalítica selectiva

Cruz-Navarro¹

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Among the human activities that generate greenhouse gases (GHG), the energy sector is the largest source of emissions, with carbon dioxide (CO₂) being the main gas emitted. It has been shown that the increase in the atmospheric concentration of GHG of anthropogenic origin, especially CO₂, generates global climate variations, which causes extreme natural phenomena, changes in precipitation patterns, melting glaciers, low agricultural yields, acidification of the oceans, among others, which deteriorate the quality of life of the world population. Due to this scenario, the development of CO₂ emission control technologies is gaining more interest every day, but in addition to emission control, it has been proposed to use CO₂ as a raw material to obtain products of industrial interest such as liquid fuels. Based on the above, this project proposed the conversion of CO₂ to methanol by selective catalytic hydrogenation using Cu/ZSM-5 zeolite catalysts with two SiO₂/Al₂O₃ molar ratios. The objective of the project was to generate a product with added value from the capture and conversion of CO₂, as an alternative to control the emissions of this GHG, the process is focused on the circular economy of carbon and contemplates principles of green chemistry. The hybrid catalysts allowed to obtain two value-added products from the conversion of CO₂, methanol and DME, both with great energy potential, either as fuels or raw material for obtaining chemical products, which may be of interest and benefit social, economic and environmental. However, challenges remain for this conversion alternative to be viable, in particular, CO₂ conversion must be increased to be considered as a potential alternative to reduce emissions of this greenhouse gas.

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Sustainable parts‐per‐million level catalysis with Fe^III: One‐pot cascade synthesis of 2,3‐dihydroquinazolin‐4(1H)‐ones in water

Dutta

Trivedi

Kumar

et al. 2020

Applied Organom Chemis

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A silica-supported iron complex has been identified as a highly active and reusable catalyst for the synthesis of medicinally important 2,3-dihydroquinazolin-4(1H)-ones. The catalyst was fully characterized by various spectroscopic analyses such as Fourier-transform infrared spectroscopy (FT-IR), ultraviolet-visible (UV-VIS), scanning electron microscopy (SEM), scanning electron microscopy with energy-dispersive X-ray spectroscopy (SEM-EDX), energy-dispersive spectroscopy (EDS) mapping, X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), electron paramagnetic resonance (EPR), inductively coupled plasma atomic emission spectroscopy (ICP-AES), elemental analysis, Brunauer-Emmett-Teller (BET) isotherm and thermogravimetric analysis (TGA) analysis. A diverse library of 2,3-dihydroquinazolin-4(1H)-ones including some new analogues were successfully synthesized in good to excellent yields with parts-per-million (ppm) levels of Fe using water as a solvent. The active catalyst has high turnover number (TON) and turnover frequency (TOF) at the optimized condition, which were 30,087 and 30,087 h −1 , respectively. Ppm level catalysis, wide substrate scope, shorter reaction time, reusability of the catalyst, green solvent media and gram-scale synthesis make this protocol eco-friendly and sustainable.

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Catalyst Synthesis and Characterization

Cited by 3 publications

References 89 publications

MOF-based heterogeneous catalysis in continuous flow via incorporation onto polymer-based spherical activated carbon supports

MOF-based heterogeneous catalysis in continuous flow via incorporation onto polymer-based spherical activated carbon supports

Conversión de CO₂ a metanol mediante hidrogenación catalítica selectiva

Sustainable parts‐per‐million level catalysis with Fe^III: One‐pot cascade synthesis of 2,3‐dihydroquinazolin‐4(1H)‐ones in water

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Catalyst Synthesis and Characterization

Cited by 3 publications

References 89 publications

MOF-based heterogeneous catalysis in continuous flow via incorporation onto polymer-based spherical activated carbon supports

MOF-based heterogeneous catalysis in continuous flow via incorporation onto polymer-based spherical activated carbon supports

Conversión de CO₂ a metanol mediante hidrogenación catalítica selectiva

Sustainable parts‐per‐million level catalysis with FeIII: One‐pot cascade synthesis of 2,3‐dihydroquinazolin‐4(1H)‐ones in water

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Sustainable parts‐per‐million level catalysis with Fe^III: One‐pot cascade synthesis of 2,3‐dihydroquinazolin‐4(1H)‐ones in water