Results 91 to 100 of about 17,390 (287)

A high coking-resistance catalyst for methane aromatization

open access: yes, 2001
Steaming-dealuminated HZSM-5-supported molybdenum catalysts have been found to be high coking-resistance catalysts for methane aromatization reactions; compared with conventional catalysts, they give a much higher selectivity towards ...
Ma, D   +5 more
core  

On the Origin of Alkali-Catalyzed Aromatization of Phenols

open access: yes, 2019
On the Origin of Alkali-Catalyzed Aromatization of ...
Cao, Weihong   +7 more
core   +1 more source

Uncovering Aggregation‐Induced Emission in Carbon Dots for Color‐Changing Hydrogels and Information Encryption

open access: yesAngewandte Chemie International Edition, EarlyView.
Red‐emissive carbon dots (R‐CDs) exhibiting aggregation‐induced emission (AIE) and aggregation‐caused quenching (ACQ) effects are synthesized from citric acid and urea. They display weak blue fluorescence in water but strong red emission in DMF due to aggregation.
Jiafeng Wan   +11 more
wiley   +1 more source

Aromatization of differently substituted 3,4-dihydropyrimidinone derivatives [PDF]

open access: yes, 2016
Biginellijevom reakcijom, pripravljeni su razliĉito supstituirani derivati 3,4-dihidropirimidinona. Koristeći modelni derivat 124-I-b provedena su opsežna preliminarna ispitivanja u svrhu pronalaska odgovarajućih uvjeta aromatizacije sintetiziranih ...
Lesjak Kolarović, Danijela
core  

Different mechanisms of ethane aromatization over Mo/ZSM-5 and Ga/ZSM-5 catalysts

open access: yes, 2021
Aromatization of light hydrocarbons can contribute to a secure supply of aromatics for the chemical industry. In this work, we investigate the influence of modification of zeolite ZSM-5 with Ga and Mo on the reaction mechanism underlying the activation ...
Saito, H.   +5 more
core   +1 more source

Catalytic Pyrolysis of Waste Polystyrene Over Fe–B Composite Catalyst for Enhanced Liquid Fuel Production

open access: yesAsia-Pacific Journal of Chemical Engineering, EarlyView.
ABSTRACT Healthcare derived polystyrene waste represents a growing and under addressed fraction of plastic waste streams due to contamination risks and limited recyclability. This study aims to investigate the valorization of waste polystyrene foam through catalytic and noncatalytic pyrolysis pathways to evaluate product yield distribution and identify
Salman Khan   +4 more
wiley   +1 more source

Product selectivity and aromatics distribution in aromatization of propane over H-GaMFI zeolite: influence of temperature

open access: yes, 1998
Influence of temperature on the product selectivity, distribution of aromatics and p-X/m-X and p-X/o-X product ratios and also on the dehydrogenation/cracking, aromatization/cracking and aromatization/dehydrogenation activity ratios, in the aromatization
Choudhary, V. R.   +3 more
core   +1 more source

Tunable aromaticity? An unrecognized new aromatic molecule?

open access: yes, 2023
Some time ago in 2010, I showed a chemical problem I used to set during university entrance interviews. It was all about pattern recognition and how one can develop a hypothesis based on this.
openaire   +1 more source

Potassium hydroxide activation of microalgal biochar for improved adsorption efficiency

open access: yesBiofuels, Bioproducts and Biorefining, EarlyView.
Abstract Activated carbon was prepared from Chlorella by carbonization and potassium hydroxide activation, and its structural properties and methylene blue (MB) adsorption performance were evaluated. Raw Chlorella exhibited an adsorption capacity of 287.2 mg g−1, which decreased to 214.8 mg g−1 after carbonization.
Keito Kubota   +3 more
wiley   +1 more source

Enhanced performance of methane dehydro-aromatization on Mo-based HZSM-5 zeolite pretreated by NH4F

open access: yes, 2007
Enhanced performance of methane dehydro-aromatization reaction (MDA) were achieved on a Mo-based HZSM-5 zeolite catalyst in which HZSM-5 were pretreated by a proper amount of NH4F (Mo/HZ(F)). The results of NH3-TPD and Al-27 MAS NMR demonstrated that the
Xu, Yide   +8 more
core   +1 more source

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