Alumina-supported Pt is one of the major industrial catalysts for light alkane dehydrogenation. This catalyst loses activity during reaction, with coke formation often considered as the reason for deactivation. As we show in this study, the amount and nature of carbon deposits do not directly correlate with the loss of activity. Rather, it is the transformation of subnanometer Pt species into l...

In the present study, γ-Al2O3 was fabricated from Tan Rai alumina hydroxide by some following steps: purifying hydroxitde HCl solution 5% to remove impurities, dissolving 25% obtain AlCl3 and then react with (NH4)2CO3 get AACH, decomposition of AACH at 500oC produce γ-Al2O3. After that, Sodium dodecyl sulfate (SDS) used modify surface increased area. The material will be removal Rhodamine B was...

Three different microalgae species, Desmodesmus sp., Nannochloropsis oculata and Halamphora coffeaeformis were grown under controlled conditions. The resulting dry biomass was characterized by TG-DTA (thermogravimetry-differential thermal analysis) extracted with three solvents having polarities. extracts gross mass yields varied from 2% using n-hexane to 23% (or 74% when subtracting the volati...

Organic/oxide interfaces play an important role in many areas of chemistry and particular for lubrication corrosion. Molecular dynamics simulations are the method choice providing complementary insight to experiments. However, force fields used simulate interaction between molecules oxide surfaces tend capture only weak physisorption interactions, discarding stabilizing Lewis acid/base interact...

The use of hydrogen peroxide as an oxidizing agent becomes increasingly important in chemistry. example vegetable oil epoxidation is excellent illustration the potential such agent. This reaction traditionally performed by Prileschajew oxidation, i.e., situ production percarboxylic acids. Drawbacks this approach are side reactions ring-opening and thermal runaway due to acid instability. One wa...

To sustainably reduce carbon dioxide (CO2) emissions at ambient temperature and atmospheric pressure, CO2 is reduced to monoxide (CO) using nonthermal plasma (NTP) flow a catalyst. In liquefied natural gas (LNG) gas-turbine combined power generation plant with high efficiency, zero-emission can be achieved for the if energy efficiency of reduction by NTP least 49%. this study, performance evalu...

1. Introduction A major field of ongoing study in gas mixture separation technology involves the development of novel composite ceramic membranes suitable for use across a broad range of process conditions. A common theme in these studies is the use of mesoporous/microporous support materials (e.g. α-alumina/γ-alumina, Vycor etc) with a minimum pore size of approximately 5 nm, in some cases sup...

The atomic-scale characterization of surface active sites on γ-alumina still represents a great challenge for numerous catalytic applications. Here, we combine advanced density functional theory (DFT) calculations with one- and two-dimensional proton solid-state NMR experiments to identify the exact location spatial proximity hydroxyl groups crystallites. Our approach relies revisited models (1...