Common Pitfalls of Catalysis Manuscripts Submitted to<i>Chemistry of Materials</i>

Schüth, Ferdi; Ward, Michael D.; Buriak, Jillian M.

doi:10.1021/acs.chemmater.8b01831

Cited by 94 publications

(74 citation statements)

References 5 publications

(5 reference statements)

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“…DTH and MTH reactions show high and stable levels of conversion during 240 min on stream whereas CTH reaction shows lower levels of conversion reaching a maximum at 35 min. It is clear that DTH and MTH reactions take place with an excess of catalyst as long as CTH reaction is limited by the catalyst amount which is not the best choice to compare catalytic performance . When we analyze the behaviors of the reaction with n BAS /F and TOS, we observe a significant conversion drop for the CTH reaction.…”

Section: Resultsmentioning

confidence: 97%

“…It is clear that DTH and MTH reactions take place with an excess of catalyst as long as CTH reaction is limited by the catalyst amount which is not the best choice to compare catalytic performance. [44,45] When we analyze the behaviors of the reaction with n BAS /F and TOS, we observe a significant conversion drop for the CTH reaction. In the first 20 min on stream, the conversion increases up to 65 % indicating a slower initiation period and afterward it progressively decreases down to 46 % at 240 min on stream indicating that the catalyst deactivation is faster.…”

Section: Introductionmentioning

confidence: 97%

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Kinetic and Deactivation Differences Among Methanol, Dimethyl Ether and Chloromethane as Stock for Hydrocarbons

et al. 2019

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The conversions into hydrocarbons of methanol, dimethyl ether and chloromethane (MTH, DTH and CTH, respectively) on a H‐ZSM‐5 zeolite catalyst were compared trough ab‐initio calculations and experiments, using a fixed‐bed reactor and in‐situ FTIR spectroscopy. The molecular modelling of the reaction was performed using force field calculations. The nature and location of retained species were assessed by a combination of techniques. The experimental results of activity, product distribution and deactivation match these of the molecular modelling as the three reactions proceed through the dual‐cycle mechanism. However, the initiation, evolution and degradation of hydrocarbon pool species are kinetically different depending on the reactant. The reactions are faster in the order DTH>MTH≫CTH whereas the rate at which coke forms and grows (linked with the rate of deactivation) is in the order CTH≫DTH>MTH.

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Section: Resultsmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 97%

Kinetic and Deactivation Differences Among Methanol, Dimethyl Ether and Chloromethane as Stock for Hydrocarbons

et al. 2019

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“…A large amount of information is presented herein, but not all research in the lignin valorization literature can be compared easily, and some studies fail to characterize the kinetics, mass transfer, and material properties of the catalysts used for depolymerization. Mass‐transfer limitations are often overlooked and can be ruled out with additional characterization . Neglecting mass‐transfer limitations may impede accurate comparisons between catalysts, especially those reactions with seemingly high conversion.…”

Section: Caveats and Pitfallsmentioning

confidence: 99%

Heterogeneous Catalyst Design Principles for the Conversion of Lignin into High‐Value Commodity Fuels and Chemicals

2020

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Lignin valorization has risen as a promising pathway to supplant the use of petrochemicals for chemical commodities and fuels. However, the challenges of separating and breaking down lignin from lignocellulosic biomass are the primary barriers to success. Integrated biorefinery systems that incorporate both homo‐ and heterogeneous catalysis for the upgrading of lignin intermediates have emerged as a viable solution. Homogeneous catalysis can perform selected chemistries, such as the hydrolysis and dehydration of ester or ether bonds, that are more suitable for the pretreatment and fractionation of biomass. Heterogeneous catalysis, however, offers a tunable platform for the conversion of extracted lignin into chemicals, fuels, and materials. Tremendous effort has been invested in elucidating the necessary factors for the valorization of lignin by using heterogeneous catalysts, with efforts to explore more robust methods to drive down costs. Current progress in lignin conversion has fostered numerous advances, but understanding the key catalyst design principles is important for advancing the field. This Minireview aims to provide a summary on the fundamental design principles for the selective conversion of lignin by using heterogeneous catalysts, including the pairing of catalyst metals, supports, and solvents. The review puts a particular focus on the use of bimetallic catalysts on porous supports as a strategy for the selective conversion of lignin. Finally, future research on the valorization of lignin is proposed on the basis of recent progress.

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“…Although quite a few reports in which MOFs have been used directly as catalysts have claimed that the MOF catalysts showed good stability during testing, a lot of them failed to conduct post‐reaction analysis to confirm these statements . Indeed, stability is a serious issue for MOFs, in particular under the highly negative potentials that are usually required in the CO 2 ER, because these potentials are often more negative than the reduction potentials of many metals that are used in the MOF synthesis (Table ).…”

Section: Mof‐related Catalysts For Co2ermentioning

confidence: 99%

Engineering Metal–Organic Frameworks for the Electrochemical Reduction of CO₂: A Minireview

Wang

Kapteijn

Gascón

2019

Chemistry An Asian Journal

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The electrochemical reduction of CO 2 holds great promise for lowering the concentrationo fC O 2 in the Earth's atmosphere.H owever,s everalc hallenges have hindered the commercialization of this technology,i ncluding energy efficiency,t he solubility of CO 2 in the aqueous phase, and elec-trode stability. In this Minireview,w eh ighlight and summarize the main advantages and limitations that metal-organic frameworks (MOFs) may offer in this field of research, either when used directly as electrocatalysts or when used as catalyst precursors. velopedt od ate, features cathode and anode compartments that are filled with an aqueous electrolyte and separated by a membrane. MOF and MOF-derived catalystsa re mostly particles, and are used as supported catalysts in CO 2 ER cells. The CO 2 molecules approacht he catalytic sites throughd iffusion in the aqueous phase, and several valuable products can be generated, such as CO, C 2 H 4 ,H COOH, oxalic acid, and alcohols. As [a] R.

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Common Pitfalls of Catalysis Manuscripts Submitted toChemistry of Materials

Cited by 94 publications

References 5 publications

Kinetic and Deactivation Differences Among Methanol, Dimethyl Ether and Chloromethane as Stock for Hydrocarbons

Kinetic and Deactivation Differences Among Methanol, Dimethyl Ether and Chloromethane as Stock for Hydrocarbons

Heterogeneous Catalyst Design Principles for the Conversion of Lignin into High‐Value Commodity Fuels and Chemicals

Engineering Metal–Organic Frameworks for the Electrochemical Reduction of CO₂: A Minireview

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Common Pitfalls of Catalysis Manuscripts Submitted toChemistry of Materials

Cited by 94 publications

References 5 publications

Kinetic and Deactivation Differences Among Methanol, Dimethyl Ether and Chloromethane as Stock for Hydrocarbons

Kinetic and Deactivation Differences Among Methanol, Dimethyl Ether and Chloromethane as Stock for Hydrocarbons

Heterogeneous Catalyst Design Principles for the Conversion of Lignin into High‐Value Commodity Fuels and Chemicals

Engineering Metal–Organic Frameworks for the Electrochemical Reduction of CO2: A Minireview

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About

Engineering Metal–Organic Frameworks for the Electrochemical Reduction of CO₂: A Minireview