نتایج جستجو برای: mto
تعداد نتایج: 435 فیلتر نتایج به سال:
الفین¬های سبک نظیر اتیلن، پروپیلن و بوتیلن خوراک اصلی صنعت پتروشیمی است و عمدتا از منابع نفتی تولید می شود. با توجه به رشد نیاز صنعت به الفین¬های سبک و کمبود منابع نفتی در آینده، فرآیند تبدیل متانول به الفین¬ها (mto) با استفاده از منبعی غیر¬نفتی به عنوان روشی جایگزین مورد توجه قرار گرفته است. در این پایان¬نامه برای بررسی اثر پارامترهای دما و زمان تبلور، در سنتز کاتالیست sapo-34 ، به تعداد 9 نمو...
The pore size of the chabazite structure is exceptionally suitable for methanol to olefins (MTO) reaction. reaction has an induction period required formation a hydrocarbon pool (HP), usually composed aromatic compounds different sizes. HP alkylated by and afterward cracked, leading olefins. Despite importance HP, its growth in are exceedingly dependent on porosity catalyst. ideal that formed r...
Manufacturing companies want to implement the make-to-order (MTO) strategy to be more flexible and responsive to the volatility of demand and product variability. However, the make-to-stock (MTS) approach is an appealing concept due to its desirable performance properties: high capacity utilization, high availability and short lead times. This paper aims to define a methodology that combines th...
The synthesis of stereoisomers of acuminatolide is rare and requires complex and time-consuming multistep procedures. Asarinin (1) and sesamin (2), two diasteromeric tetrahydrofurofuran lignans, are efficiently mono-dearylated by methyltrioxorhenium (MTO, I) and hydrogen peroxide (H2O2) or urea hydrogen peroxide adduct (UHP) as primary oxidant to give (-)-(7R,8'R,8R)-acuminatolide (3A) and (+)-...
The Moving to Opportunity (MTO) demonstration assigned housing vouchers via random lottery to public housing residents in five cities. We use the exogenous variation in residential locations generated by MTO to estimate neighborhood effects on youth crime and delinquency. The offer to relocate to lower-poverty areas reduces arrests among female youth for violent and property crimes, relative to...
A CON-type zeolite underwent bead-milling, recrystallisation and defect-healing treatments to yield highly crystalline nanoparticles, showing prolonged lifetime in MTO reactions.
Multi-scale topology optimization (a.k.a. micro-structural optimization, MTO) consists in optimizing macro-scale and micro-scale simultaneously. MTO could improve structural performance of products significantly. However, a few issues related to connectivity between micro-structures high computational cost have be addressed, without resulting loss performance. In this paper, new efficient multi...
The light olefin product distribution of the methanol-to-olefin (MTO) reaction catalyzed by acid zeolites and zeotypes depends on nature entrapped hydrocarbon pool species that act as co-catalysts. preferential stabilization confinement effects cationic intermediates involved in side-chain or paring pathways aromatics-based cycle MTO mechanism small-pore cage-based is determined topology cavity...
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