نتایج جستجو برای: heterogenous catalyst
تعداد نتایج: 49145 فیلتر نتایج به سال:
A novel generic method of silica supported catalyst system generation from a fluid state is presented. The technique is based on the combined flow and radiation (such as microwave, thermal or UV) induced co-assembly of the support and catalyst precursors forming nano-reactors, followed by catalyst precursor decomposition. The transformation from the precursor to supported catalyst oxide state c...
While metal-organic frameworks (MOFs) exhibit excellent potential in extensive catalytic reactions, predictably synthesizing MOF nanoparticles (NPs) with desired and uniform sizes remains a great challenge. Here, mild efficient ultrasound-assisted synthetic method has been developed to prepare ZIF-8, ZIF-67, Co/ZIF-8 well-designed particle size morphology. By adjusting the cobalt content doped ...
This paper develops a new unified theoretical general equilibrium model in which the interactions between heterogeneous workers and firms influence city evolutions. Given worker–firm–city framework, I study depth possible heterogenous evolutions resulting implications on labor market, as well overall productivity. In particular, it is shown that same exogenous shocks may lead to completely diff...
The activity of a Te-MgO catalyst prepared by adsorbing Te vapor onto MgO powder was determined by dehydrogenation of indane, 9,10-dihydrophenanthrene, cumene, and p-cymene. The activity of the Te-MgO catalyst was higher than that of the MgO catalyst in most of the cases investigated. The selectivity of the former catalyst was much higher than that of the later in all cases studied. The Te-MgO ...
A new catalyst derived from osmium has been prepared, fully characterized and tested in the dihydroxylation of alkenes. The catalyst was prepared by wet impregnation methodology of OsCl3•3H2O on a commercial micro-magnetite surface. The catalyst allowed the reaction with one of the lowest osmium loadings for a heterogeneous catalyst and was selective for the monodihydroxylation of 1,5-dienes. M...
The Association Agreement between Jordan and the EU entered into force in 2002. It provides a gradual reduction of import duties on EU products over a period of twelve years. In this paper we investigate the economic implications of induced trade liberalization on aggregate economic performance as well as effects on welfare and income distribution of heterogenous households. This is done by int...
This paper reflects our experience with CQA/CDB, a prototype rational linear constraint database. First, we show that the standard semantics of constraint databases lead to an anomaly when queried in the presence of missing attributes. In CQA/CDB, this anomaly is avoided by enriching the CDB relational schema, resulting in heterogenous databases. Then, we present spatial databases as a special ...
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