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The present study examined the adsorption of As(III) and As(V) (arsenics) from aqueous solutions using FeCl

Numerical investigations have been carried out for a postulated enclosure fire scenario instigated due to methanol pool ignition in a chemical cleaning facility. The pool fire under consideration is radiation-dominated and poses a risk to the nearby objects if appropriate safety requirements are not met. The objective of the current study was to numerically evaluate the postulated fire scenario and provide safety recommendations to prevent/minimize the hazard. To do this, the fire scenario was first modeled using the finite volume method (FVM) based solver to predict the fire characteristics and the resulting changes inside the enclosure. The FDS predicted temperatures were then used as input boundary conditions to conduct a three-dimensional heat transfer analysis using the finite element method (FEM). The coupled FVM–FEM simulation approach enabled detailed three-dimensional conjugate heat transfer analysis. The proposed FVM–FEM coupled approach to analyze the fire dynamics and heat transfer will be helpful to safety engineers in carrying out a more robust and reliable fire risk assessment.

Department of Chemical Engineering, Maulana Azad National Institute of Technology, Bhopal-462 003, Madhya Pradesh, India Eco-Science and Technology, Bhopal-462 003, Madhya Pradesh, India ONGC Energy Centre, 8th Floor, Core-3&4, SCOPE Minar, Laxmi Nagar, Delhi-110 092, India E-mail: sanjeev_katti@ongc.co.in Manuscript received online 17 November 2020, revised and accepted 27 December 2020 The aim of this mini-review is to explore the potential of indigenous photocatalytic assisted microwave plasma based pyrolyser for COVID-19 related wastes (gloves, masks, bottles, personal protective equipment (PPE), etc.) conversion into liquid oil. Plasma pyrolysis can provide solution for complete pyrolysis of typical hospital wastes not limited to PPE wastes. Literature survey reveals that pyrolysis of polystyrene (PS) plastic waste feedstock can yield up to 80% of pyrolytic oil including styrene, ethylbenzene and toluene with their physico-chemical properties such as density, viscosity, flash point, freezing point, pour point, and high heating values very similar to the conventional diesel and therefore, possess potential as an alternative source for power generation. It is suggested that char produced from pyrolysis has requisite properties for electro-oxidation of CO2. Moreover, if such a system could be integrated with a microwave heating process having absorbents like silicon carbide and different catalyst combinations, up to 32% energy saving could be done in the process that would be rapid, uniform and energy-efficient.