Ti-MCM-41 was synthesized at pH 3, 7 and 11. The titanium content was determined by AAS and found to be 4%, 3.2% and 4.5%, respectively. In order to increase the titanium content in Ti-MCM-41, Ti(IV) ions were grafted onto TiMCM-41 using TiCl4 in toluene and Ti(OBu)4 in ethanol. The incorporation of Ti was determined to be 28% and 30%, respectively. The oxidation of olefins such as cyclopentene...

Targeting noncatalytic cysteine residues with irreversible acrylamide-based inhibitors is a powerful approach for enhancing pharmacological potency and selectivity. Nevertheless, concerns about off-target modification motivate the development of reversible cysteine-targeting strategies. Here we show that electron-deficient olefins, including acrylamides, can be tuned to react with cysteine thio...

Cavity-directed chemical transformations represent one of the most important features in 3-D host chemistry, yet they are unexplored as synthetic receptors. We are developing such functions with the large cavity of self-assembled cages, particularly an M6L4-type cage. The photodimerization of olefins within this cage shows remarkable rate enhancement, perfect regioand stereoselection, and high ...

In Fischer-Tropsch synthesis (FTS), a variety of hydrocarbons with different chain lengths are formed. The selectivities depend on the catalyst and reaction conditions. Co-feeding olefins allows changing selectivity even outside rules Anderson-Schulz-Flory distribution. this work, ethene, propene, 1-butene were co-fed to Co-Mn-catalyzed FTS increase olefin in C3- C8-fraction. An CO rate oxygena...

Ketene (CH2=C=O) has been postulated as a key intermediate for the first olefin production in zeolite-catalyzed chemistry of methanol-to-olefins (MTO) and syngas-to-olefins (STO) processes. The reaction mechanism remains elusive, because short-lived ethenone ketene its derivatives are difficult to detect, which is further complicated by low expected concentration. We report on experimental dete...

The fluid catalytic cracking (FCC) process is an alternative olefin production technology, with lower CO2 emission and higher energy-saving. This used for by almost 60% of the global feedstocks. Different parameters including operating conditions, feedstock properties, type catalyst can strongly affect activity product distribution. FCC catalysts contain zeolite as active component, a matrix, b...

The Front Cover shows a coarse solid residue particle, originating from the gasification of biomass, which acts as catalyst to produce high-value chemicals, such olefins, mixtures H2, CO, and CO2. heart developed material are nanoparticles, consisting iron carbides metal, together with some alkali elements, sodium potassium. latter elements act promotors boost production light olefins. This app...

Two Ag-Pd (nominal 1 % wt each) bimetallic catalysts supported on commercial activated carbon were synthesized and tested, for the first time, in hydrodechlorination (HDC) of trichloromethane (TCM) to obtain light olefins. different Pd precursors used, PdCl2 Pd(NO3)2, being resulting denoted as AgPdCl/C AgPdN/C, respectively. A monometallic Ag catalyst was also prepared comparison purposes. The...

Formaldehyde (HCHO), generating from hydrogen transfer (HT) of reactant, is significant for autocatalysis initiation and deactivation in methanol-to-olefins (MTO), but hitherto, its evolution throughout the reaction has not been thoroughly revealed. Herein, by established colorimetric analysis method, HCHO MTO dimethyl ether (DME)-to-olefins (DTO) reactions over SAPO-34 was situ quantitatively ...

In order to enhance the catalytic performance of SAPO-34 catalyst for the reaction of methanol to olefins (MTO), ultrasonic and microwave-assisted aging method were employed in static hydrothermal method to synthesize nano-sized SAPO-34. The effects of the application of this method on the chemical composition, morphology, surface area and total acidity of SAPO-34 were characterized by XRD, FE-...