We report the synthesis of a new hierarchical mesoporous TS-1 type zeolite by a simple steam-assisted crystallization method. This novel product exhibits high catalytic activity and a strongly prolonged lifetime in the selective oxidation of 2,3,6-trimethylphenol to trimethyl-p-benzoquinone.

We report the synthesis of a new kind of uniform hollow zeolite microspheres with hierarchical macro-/meso-/microporosity by an efficient strategy combining bi-templating, steam-assisted crystallization and then a mild alkaline etching method. This novel product has a hollow architecture, highly crystallized zeolite shells and more importantly, high dye adsorption capabilities.

The sustainable development of oil–gas and petrochemical industries necessitates the cost-effective eco-friendly technologies to treat mass-produced oily wastewater discharge from these industries. This study applied a simple radical polymerization enhance oil adsorption efficiency agricultural waste biomass wheat straw (WS) by grafting biocompatible poly(methyl methacrylate) (PMMA). Diesel oil...

Background/Introduction Minimally-invasive cardiac surgery is increasingly used in conjunction with peripheral cannulation. However, due to the relatively small diameter of the access vessels, thin walled venous cannulas are usually used in conjunction with augmentation. We have previously reported about 36F self-expanding cannulas which allow for remote cannulation and full flow (2.4 l/min m2)...

Measurement of drainage relative permeability by the centrifuge method was first introduced by Hagoort. It has been shown that capillary end effects can cause errors in the measurements if a minimum rotational speed is not honored. To determine the min ! , we propose maintaining the value of capillary-gravity number, cg N , to be of the order of 10 -2 or smaller, at which the capillary end effe...

Shear induced drainage of a foamy yield-stress fluid is investigated using MRI techniques. Whereas the yield stress of the interstitial fluid stabilizes the system at rest, a fast drainage is observed when a horizontal shear is imposed. It is shown that the sheared interstitial material behaves as a viscous fluid in the direction of gravity, the effective viscosity of which is controlled by she...

The purpose of this study is the detection of lateral and vertical gradients of relative concentrations of compounds presented in oil. In addition, the detection allows us to assess potential drainage zones in a reservoir during the reservoir production by steam injection. In this paper, a new method for monitoring of steam chamber development in a 2D model was created and tested. The methodol...

OBJECTIVES/HYPOTHESIS To present the surgical technique and feasibility of robot-assisted submandibular gland (SMG) resection via retroauricular approach. STUDY DESIGN Feasibility study of case series. METHODS We performed robot-assisted SMG resection on five patients with benign SMG tumors. The surgical complications, operation time, amount of bleeding, amount and duration of drainage, and...