[Reaction: see text]. A solid understanding of the mechanisms involved in heterogeneously catalyzed reactions is of fundamental interest for modern chemistry. This information can help to refine modern theories of catalysis and, in a very practical way, can help researchers to optimize existing industrial processes and develop new ones. To understand the mechanisms of heterogeneous catalysis, w...

This thesis deals with the development of catalytic oxidation reactions utilizing hydrogen peroxide as terminal oxidant. The main focus has been to find flavin catalysts that are easy to handle and stable to store but still able to perform the desired reaction. A variety of dihydroflavins were prepared and the electrochemical oxidation potentials were measured and compared with their catalytic ...

The dynamics of retained and deactivating species in a SAPO-18 catalyst during the methanol-to-olefins reaction have been followed using combination ex-situ in-situ techniques differential integral reactors.The were analyzed extraction, FTIR UV-vis spectroscopies combined with online product analysis (gas chromatography mass spectrometry). composition extracted soluble was determined gas chroma...

The use of methanol over ZSM-5 and modified catalysts for the production light olefins has emerged as an effective new strategy this industry. In methanol-to-olefin (MTO) process, challenges are maintaining product selectivity prolonging lifetime catalyst manufacturing become

We studied the Baeyer–Villiger (BV) type oxidation of phenylrhenium trioxide (PTO) by H2O2 in the aqueous phase using Quantum Mechanics (density functional theory with the M06 functional) focusing on how the solution pH and the para-substituent affect the Gibbs free energy surfaces. For both PTO and MTO (methylrhenium trioxide) cases, we find that for pH > 1 the BV pathway having OH as the leav...

Purpose: The theory of constraints (TOC) drum-buffer-rope methodology is appropriate when managing a production plant in complex environments, such as make-to-order (MTO) scenarios. However, some difficulties have been detected implementing this changing environments. This case study analyses MTO company to identify the key factors that influence execution third step TOC. It also aims evaluate ...

The demand for increasing product variety and customization has forced many companies to adopt a make-to-order (MTO) strategy. Traditional push-type MTO suffer from unstable demands, struggling deliver on time, making them consider the utilization of pull systems control production. In present paper, an overview in environments is presented. Moreover, discrete event simulation (DES) model compa...

Modern market requirements for transportation of cargo flows according to the «quality, speed, and cost» criteria were studied. It was found that multimodal routes have lowest delivery time, high reliability, minimum transit which provides a more accurate level control costs, traffic schedules, transport safety. determined effectiveness schemes depends on degree realization resource capabilitie...