The reaction and separation sections are the keys to methanol-to-olefins (MTO) chemical processes, they should be optimized reduce cost of production. This work develops a framework for simultaneous design optimization distillation sections. An model with shortcut rigorous methods combined is established columns improve accuracy efficiency. With auxiliary devices selection utilities considered,...

Purpose: The knowledge, attitudes and practice among inhabitants of Mto wa Mbu Division was examined to provide objective information on sparganosis infection. Hence, the study was carried out. Methods: The study was conducted among the inhabitants of Mto wa Mbu Division, Monduli District, Tanzania from January to April 2012. Inhabitants were informed about the objective of the study and invite...

This paper describes the exploration of manufacturing planning and control issues in the capital goods industry using a simulation approach. The companies produce products which have deep and complex product structures and are produced in low volume on an engineeror make-to-order basis (ETO, MTO). The work reported here draws on the results of surveys of companies involved in the manufacture of...

This paper addresses the impact of power devices switching characteristics on design and performance of pulsewidth-modulated current stiff converter (CSC) topologies with resonant snubbers. The MOS turn-off (MTO) thyristors were selected for this study due to their high voltage and current ratings, simplified gate drive circuitry, unity gain turn-off, greatly reduced storage time allowing highe...

The methanol-to-olefin (MTO) process allows the conversion of methanol/dimethyl ether into olefins on acidic zeolites via the so-called hydrocarbon pool mechanism. However, the site and mechanism of formation of the first carbon-carbon bond are still a matter of debate. Here, we show that the Lewis acidic Al sites on the 110 facet of γ-Al2O3 can readily activate dimethyl ether to yield CH4, alk...

Dynamic business markets are forcing B2B marketers to create flexibility in their firms. The present study investigates: (1) made-to-stock (MTS) versus made-to-order (MTO, which is considered more flexible); (2) production technology routineness (with nonroutine considered more flexible); and (3) a marketing-based enabler of flexibility, i.e., applied customer knowledge. SEM analysis shows that...

New experimental techniques of in situ MAS NMR spectroscopy introduced in the past decade made this analytical method to a useful tool for the study of heterogeneously catalyzed reactions. Batch and flow techniques were applied to study reactions catalyzed by basic and acidic solids. The present review introduces into in situ MAS NMR investigations of transition states, e.g., via the H/D exchan...

M ake-to-order (MTO) manufacturers must ensure concurrent availability of all parts required for production, as any unavailability may cause a delay in completion time. A major challenge for MTO manufacturers operating under high demand variability is to produce customized parts in time to meet internal production schedules. We present a case study of a producer of MTO offshore oil rigs that hi...

The thermodynamic of the known and very effective catalytic system, hydrogen peroxide (H2O2) and methyltrioxorhenium (MTO) is studied in different solvents using UV-Visible spectroscopic method. The thermodynamic parameters (ΔG, ΔH and ΔS) for two equilibrium reactions, MTO + H2O2 ⇌ A + H2O and A + H2O2 ⇌ B.H2O (A, [MeRe(O)2(O2)]; B.H2O, [MeRe(OH2)(O)(O2)2]), are determined. The obtained free e...