The handling of solid reagents, catalysts and by-products is a daunting challenge in continuous-flow micro- milli-reactors. Suspensions tend to settle over time leading irrevocable clogging the reaction channels. Herein, we describe our efforts develop an ultrasonic milli-reactor which can handle such challenging solid-containing transformations. reactor consists Langevin-type transducer, sonot...

introduction biofuels are considered as one of the largest sources of renewable fuels or replacement of fossil fuels. combustion of plant-based fuels is the indirect use of solar energy. biofuels significantly have less pollution than other fossil fuels and can easily generate from residual plant material. waste and residues of foods and wastewater can also be a good source for biofuel producti...

Sonolysis and photochemical degradation of different compounds such as chlorinated aliphatic hydrocarbons are among the recent advanced oxidation processes. Perchloroethylene is one of these compounds that has been mainly used as a solvent and degreaser. In this work, elimination of perchloroethylene in aqueous solution by ultrasonic irradiation, andphotochemical oxidation by ultra violet ray a...

Titanium(IV) oxide graphene [1] or graphene oxide nano composite [2] were prepared by one-pot thermal hydrolysis of suspension graphene or graphene oxide nanosheets and titanium oxide in three different forms as a starting materials. Graphene nanosheets were produced in a large quantity from natural graphite using a high intensity cavitation field in a pressurized ultrasonic reactor [3]. The gr...

Hard facing alloys like Colmonoy are overlaid on nuclear components to provide corrosion, wear and galling resistance under high temperature service conditions. Typical reactor components on which overlays are provided include grid plate, diverse safety rod drive mechanism etc. The thickness of the overlay ranges from 0.5-3 mm. Typical defects likely during deposition include lack of bonding be...

In this paper, we present two feature extraction techniques for the classification of ultrasonic NDE signals acquired from weld inspection regions of boiling water reactor piping of nuclear power plants. The classification system consists of a pre-processing block that extracts features from the incoming patterns, and of an artificial neural network that assigns the computed features to a parti...

This paper presents the in-house development and application of a C-scan ultrasonic facility ULTIMA 200M2 at the Indira Gandhi Centre for Atomic Research (IGCAR), Kalpakkam, carried out in collaboration with the Electronics Division, Bhabha Atomic Research Centre (BARC), Mumbai. The paper describes various constituents of the system developed and also highlights the typical results obtained usi...