Effective factors on performance of zeolite based metal catalysts in light hydrocarbon aromatization

Sharifi, Khashayar; Halladj, Rouein; Royaee, Sayed Javid; Towfighi, Farshid; Firoozi, Sepideh

doi:10.1515/revce-2020-0082

Cited by 9 publications

(5 citation statements)

References 121 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Using dehydration, DEE is turned into C 4 olefins, which are then further converted into higher hydrocarbons through oligomerization, cracking, and aromatization, among other processes. Solid acid catalysts have been shown to improve the efficiency of these processes [23][24][25][26]. In several acid-catalyzed conversions of olefins, olefin oligomerization is a deactivation or undesirable reaction process.…”

Section: Review Of Catalysts For Low Alcohol Conversion Into Fuels An...mentioning

confidence: 99%

Catalytic Conversion of Low Alcohol to Hydrocarbons: Challenges, Prospects, and Future Work Considerations

Anekwe

Isa

2023

International Journal of Energy Research

View full text Add to dashboard Cite

Energy sources will contribute enormously to global economic development in the coming years. Global energy sectors mainly depend on fossil fuels, which contribute to greenhouse gas emissions. With the threat of declining oil supplies and the need to reduce CO2 emissions, the development of viable substitutes for fossil fuels is high on the global priority list. Currently, there is an increased focus on using low alcohols as fuels and petrochemicals. Catalytic conversion is a viable approach for upgrading low alcohols to fuels and value-added chemicals. This review study shows that optimal catalyst modification improves catalytic performance in the volarization of bioethanol. Heterogeneous catalysts are widely used in bioethanol conversion due to their activity. However, further studies are needed to address the challenges of limited selectivity, catalyst deactivation, recovery, and regeneration for improved biofuel production.

show abstract

Section: Review Of Catalysts For Low Alcohol Conversion Into Fuels An...mentioning

confidence: 99%

Catalytic Conversion of Low Alcohol to Hydrocarbons: Challenges, Prospects, and Future Work Considerations

Anekwe

Isa

2023

International Journal of Energy Research

View full text Add to dashboard Cite

show abstract

“…Nevertheless, review articles on light alkane aromatization have been generally centered towards delivering a broad perspective of the reaction, often focusing on the conversion of individual alkane reactants. [17,[29][30][31][32][33] Only a few reviews have covered the addition of co-reactants in detail, [34,35] and thus, the literature lacks a comprehensive compilation of these studies. In this review, we gathered the substantial amount of work on the introduction of co-reactants in light alkane (C 1 -C 3 ) aromatization, within the past few decades.…”

Section: Introductionmentioning

confidence: 99%

“…Consequently, a vast amount of information has been accumulated regarding the pronounced effect of each co‐reactant and its underlying mechanism. Nevertheless, review articles on light alkane aromatization have been generally centered towards delivering a broad perspective of the reaction, often focusing on the conversion of individual alkane reactants [17,29–33] . Only a few reviews have covered the addition of co‐reactants in detail, [34,35] and thus, the literature lacks a comprehensive compilation of these studies.…”

Section: Introductionmentioning

confidence: 99%

Application of co‐feeds in the catalytic conversion of light alkanes to aromatics: A comprehensive review

Lim,

Ryu,

Hwang

et al. 2024

ChemCatChem

View full text Add to dashboard Cite

Catalytic conversion of light alkanes (C1‐C3) to aromatics offers an attractive valorization route for abundant gas resources and has been a prevalent topic of research over the past few decades. Despite considerable advancements in the understanding of these reactions, several fundamental and practical hurdles have prevented their industrial application. Among the numerous attempts to resolve these issues, co‐feeding certain additives yields promising results, including the activation of alkanes under milder conditions, an increase in catalytic stability, and a shift in product distribution towards more desirable compounds. Systematic studies have elucidated the precise working mechanism of the co‐feeds in aromatization systems, explaining the experimentally observed results. This review provides an extensive compilation of information on the application of co‐feeds in light alkane aromatization, which has accumulated in the literature since the pioneering reports in the 1990s. Detailed summaries are provided for each additive, ranging from hydrocarbons to oxidants. Viable strategies for future work in this field, aiming to bridge the gap between academic studies and industrial applications, are also discussed.

show abstract

“…Consequently, the conversion of alkanes into aromatics has attracted considerable attention owing to the abundant and low-cost sources of alkanes [ 5 , 6 ]. Although ZSM-5 zeolites have been widely used as commercial aromatization catalysts, the undesired side reactions involving C–C bond cleavage and recombination often result in mixed aromatics as products [ 7 , 8 ]. Therefore, the urgent issue in dehydrogenation transformation is to explore efficient catalysts with remarkable activity, high selectivity, and outstanding stability.…”

Section: Introductionmentioning

confidence: 99%

Exploring Deactivation Reasons of Biomass-Based Phosphorus-Doped Carbon as a Metal-Free Catalyst in the Catalytic Dehydroaromatization of n-Heptane

Yu,

Liu,

Liu

2024

Molecules

View full text Add to dashboard Cite

Catalytic dehydroaromatization of n-alkanes into high-value aromatics has garnered extensive interest from both academia and industry. Our group has previously reported that phosphorus-doped carbon materials exhibit high selectivity for C-H bond activation in the dehydroaromatization of n-hexane. In this study, using n-heptane as a probe, we synthesized biomass-based phosphorus-doped carbon catalysts to investigate the impact of hydrogen heat treatment and carbon deposition on catalyst structure. Despite achieving an initial conversion of n-heptane at approximately 99.6%, with a toluene selectivity of 87.9%, the catalyst activity fell quickly. Moreover, longer hydrogen treatment time and higher hydrogen concentrations were found to accelerate catalyst deactivation. Thermogravimetric analysis (TGA) and N2 adsorption measurements (BET) indicated that a small amount of coke deposition was not the primary cause of catalyst deactivation. Temperature-programmed desorption of ammonia gas (NH3-TPD) revealed a significant decrease in acid-active functional groups. X-ray photoelectron spectroscopy (XPS) and solid-state 31P NMR spectroscopy confirmed the reduction of active central phosphorus species. These results suggest that catalyst deactivation primarily arises from the decrease in acidity and the partial reduction of phosphorus-containing groups, leading to a substantial loss of active sites. This work contributes new perspectives to understanding the properties and design improvements of metal-free carbon catalysts.

show abstract

Effective factors on performance of zeolite based metal catalysts in light hydrocarbon aromatization

Cited by 9 publications

References 121 publications

Catalytic Conversion of Low Alcohol to Hydrocarbons: Challenges, Prospects, and Future Work Considerations

Catalytic Conversion of Low Alcohol to Hydrocarbons: Challenges, Prospects, and Future Work Considerations

Application of co‐feeds in the catalytic conversion of light alkanes to aromatics: A comprehensive review

Exploring Deactivation Reasons of Biomass-Based Phosphorus-Doped Carbon as a Metal-Free Catalyst in the Catalytic Dehydroaromatization of n-Heptane

Contact Info

Product

Resources

About