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...

Light olefins, which are vital components for the petrochemical industry, are traditionally obtained through the refinement of crude oil. However, the rapidly increasing demand of oil-based chemicals calls for the development of new technologies based on alternative natural sources. Among these processes, the methanol-to-hydrocarbons (MTH) technology is one of the most promising and currently e...

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...

Fabrication of hierarchical porosity in microporous zeolites is a key to overcoming the inherent mass-transfer limitation and improving molecular accessibility active sites. The present study reports facile cost-effective etching strategy based on crystal metastability construct SAPO-34 (CHA-type) zeolite. with high crystallinity obtained conveniently via an extended hydrothermal treatment with...

For the first time, methyltrioxorhenium (MTO) has been applied as a catalyst for the dihydroxylation of allenes in the presence of hydrogen peroxide as the oxidant. The regioselectivities turn out to be well controlled, affording β-carbonyl-γ-hydroxyl diphenyl phosphine oxides as the only product. The axial chirality of optically active allenes can also be nicely transferred to the chirality ce...

The methanol-to-aromatics (MTA) process is regarded as a promising route to produce aromatic commodities through non-petroleum carbon resources, such biomass, waste, coal, natural gas, and CO2. In contrast with the industrially implemented methanol-to-olefin (MTO) process, most MTA studies are still in laboratory-scale stage. Recently, few demonstration plants of have been successfully launched...