Rabiranjan Murmu

Indira Gandhi Institute of Technology | IGIT · Chemical Engineering

This research explores the synergistic impacts of grape stalk–derived lignin biopolymer and Celosia cristata microfiber reinforcement in polymer composites, examining their effects on mechanical, wear, thermal conductivity, and flammability properties. The stir-casting method is employed during the fabrication process to amalgamate the biopolymer a...

It is difficult to select low-cost filler materials. Specifically, carbon-based filling materials are a matter of concern, and developing a carbon-filled polymer composite with enhanced properties is necessary. In this study, the authors developed a polymer composite using virgin polypropylene (PP) as a matrix and affordable micrographite (µG) as a...

The water hyacinth biosorbent has undergone thorough characterization and assessment for its capacity to remove heavy metals, specifically Pb(II) and Hg(II) from aqueous solutions. Notably, the biosorbent demonstrated an impressive maximum adsorption capacity for Pb and Hg, reaching values of 158.7 mg/g and 123.5 mg/g, respectively. Indeed, these a...

The performance of a newly designed tri-lobe industrial lobe pump of high capacity is simulated by using commercial CFD solver Ansys Fluent. A combination of user-defined-functions and meshing strategies is employed to capture the rotation of the lobes. The numerical model is validated by comparing the simulated results with the literature values....

A one dimensional isothermal model is proposed by modelling the kinetics of methanol transport at anode flow channel (AFC), membrane and cathode catalyst layer of direct methanol fuel cell (DMFC). Analytical model is proposed to predict methanol cross-over rate through the electrolyte membrane and cell performance. The model presented in this paper...

The use of supercritical fluids in industries is becoming more and more common due to various reasons such as reduced environmental effects and improved efficiency. Because of the huge cost involved, experimentally investigating heat transfer to supercritical fluids is a difficult affair. Therefore, numerical simulation is an effective tool to inve...

This work uses zinc oxide (ZnO) as a filler to prepare a chitosan-based hybrid membrane. The mechanical, thermal and physiochemical properties of the membranes were studied using different experimental techniques. The water uptake capacity and swelling degree of the composite membranes were increased whereas ion exchange capacity (IEC) decreases wi...

Nickel-aluminium coating was deposited on AISI 304 stainless steel by HVOF process. The coating was characterised by scanning electron microscope and optical microscope. The surface hardness, surface roughness, thickness and fracture toughness value of the coating was determined. Slurry erosion testes were carried out on both the coated and uncoate...

The authors developed a nanocomposite using polypropylene (PP) and graphene nanoplatelets (GNPs) with a melt mixing method. Virgin PP was filled with three sets of GNPs with a fixed thickness (15 nm) and surface area (50–80 m2/g). The selected H-type GNPs had three different sizes of 5, 15 and 25 µm. The nanocomposites were made by loading GNPs at...

In this work, we have successfully cross-linked the different weight ratio of Chitosan-PVA blend with sulfuric acid. The effect of cross-linker on the properties of blends are studied by using different experimental technique. The cross-linked membrane provides higher ion exchange capacity due to the procurement of extra ionic hooping sites in the...

We used a new strategy to develop a hybrid membrane by impregnating hygroscopic zirconia and ionic liquid in the chitosan-PVA blend. The effects of ionic liquids on the water uptake, IEC, phase transition behavior, methanol permeability, and proton conductivity of the hybrid membrane were studied. The ionic liquids have a synergetic effect on the c...

This investigation focuses to study the effect of the content of micro scale natural pistachio shell particles on the mechanical and thermal properties of unsaturated polyester matrix composites. The composite of polyester resin reinforced with 10, 20, 30 and 40 wt% PSP was made by hand mixing followed by compression molding. Several mechanical pro...

A novel cost effective Chitosan-PVA-Red Mud (RM) hybrid membranes are developed and their morphological and physiochemical properties are studied. The addition of RM enhanced IEC and bound water content in a composite membranes. The hydroxyl groups are consumed due to the interaction with silica oxides and depleted the crystalline phase of the comp...

Remarkable progress has been made to develop proton exchange membrane for direct methanol fuel cell to achieve higher power density. However, the higher methanol cross-over and poor water management are the two major obstacles of fuel cell which significantly reduces its performance. In this work, we have developed a highly performance Ionic Liquid...

The SPEEK-PVA-Silica hybrid membranes are prepared by solution casting method. The physical, chemical and electrical properties of the polymer membranes are studied by FESEM, FTIR, XRD, DSC, TGA, DMA, water and methanol uptake capacity, Ion Exchange Capacity (IEC), Degree of Sulfonation (DS), hydration number (λ), void volume fraction (%), methanol...

Graphene has accomplished huge notoriety and interest from the universe of science considering its exceptional mechanical physical and thermal properties. Graphene is an allotrope of carbon having one atom thick size and planar sheets thickly stuffed in a lattice structure resembling a honeycomb structure. Numerous methods to prepare graphene have...

This kinetic study focuses on determining the thermal gravimetric profile of a particular grade of Indian sub-bituminous coal. A thermogravimetric analyzer (TGA-1000) was employed to investigate the thermal behavior and extract the kinetic parameters of Jamadoba coal and its corresponding density separated macerals. The weight loss was measured in...

The composition of nickel-based metal matrix NiCrBSi was varied with 5%, 10% and 15% of Al2O3 particles to obtain high wear resistant coatings by means of a high-velocity oxy fuel (HVOF) thermal spraying process. The coating was characterized by optical microscope, scanning electron microscope (SEM) and X-ray diffractometer (XRD). The physical prop...

This paper presents a method by which the maximum possible rate of pulverized coal injection (PCI) in blast furnace can be predicted. The method is based on a two-step approach. First, a first principle simulation model of the blast furnace is used to generate data sets for the development of a linear model of pulverized coal injection rate. The da...

In this work, polypropylene (PP) and graphene nanoplatelet (GNPs) composites are routed through twin screw mixing and injection moulding. Two types of GNPs with a fixed size of 25 µm with surface areas ranging from 50–80 m2/g (H25, average thickness 15 nm) and 120–150 m2/g (M25, average thickness 6–8 nm) were blended with PP at loading rates of 1,...

The present experimental work reveals the surface characteristics like wettability, thermal and sliding wear behaviour of plasma-sprayed red mud (RM) coatings premixed with fly ash (FA). Varying weight % of FA (10, 20, 30 and 40)-RM composite powder is used as precursor for coating. Atmospheric plasma-sprayed coatings are developed at different ope...

The present investigation aims at evaluating the effect of fly ash, carbon and aluminium addition on coating characteristics of pure red mud. Plasma sprayed coatings composed of red mud and a varying percentage of fly ash, carbon and aluminium on mild steel are considered for the study. Plasma spraying technique is used with varying levels of power...

The present research focuses to evaluate a complete outlook of virgin high density polyethylene (HDPE) and polypropylene (PP) polyblends. Virgin PP of 10, 20, 30, 40 and 50 weight % is compounded with virgin HDPE. Tensile, Flexural and impact test specimens of virgin HDPE, Virgin PP and HDPE-PP composites are prepared via twin screw extruder and in...

The present study is an attempt to discover the hydrogen storage capacity of graphene oxide-Palladium (GO-Pd) nanocomposite through Benkeser reaction. A new route has been developed to adsorb hydrogen using GO-Pd as storage medium. Graphite is oxidised using improved Hummer’s method (soft chemistry synthetic route) to produce graphene oxide (GO) na...

The present investigation aims at evaluating the effect of fly ash addition on coating characteristics of pure red mud. Plasma sprayed coatings composed of red mud and a varying percentage of fly ash on mild steel were considered for the study. Coating technologies have already gained a promising momentum for the creation of emerging materials in t...

A novel Sulfonated polyether etherketone (SPEEK)-Polyvinyl alcohol (PVA)-Titanium dioxide (TiO 2) composite membrane is prepared for proton exchange membrane fuel cell (PEMFC) by solution casting method. In order to enhance the mechanical, thermal and hydrolytic stability of the SPEEK/PVA film; different compositions of TiO 2 particles are disperse...

The present paper investigates the effect of strain rate on different tensile properties of high density polyethylene (HDPE) and polypropylene (PP) composite. Tensile specimens of virgin HDPE-PP composites are prepared via twin screw extruder and injection moulding methods as per ASTM D638-02a (Type-I); with gage length 50 mm, width 13 mm and thick...

Polymer composites of virgin high density poly ethylene (HDPE) and virgin polypropylene (PP) are prepared. PP of weight% of 20, 30 and 50 are reinforced to HDPE in the form of pellets. They are converted into raw polymer sheets using a two roll milling machine. The prepared raw sheets have undergone compression moulding to fabricate polymer sheets...

Sulfonated Polyether Ether Ketone (SPEEK) membrane is considered as a potential alternative membrane for fuel cell because of its cost effectiveness and easily prepared. SPEEK membranes were prepared by solution casting method with film thickness of 80, 127 and 150 µm. Samples are analyzed by Fourier Transform Infrared (FTIR) Spectrometer. Water up...

Our work aims to evaluate a complete outlook of virgin high density polyethylene (HDPE) and polypropylene (PP) polyblends. Virgin PP of 20, 30 and 50 weight% is compounded with virgin HDPE. The properties like tensile strength, flexural strength, Izod impact strength are examined. Scanning electron microscopy (SEM) and polarised light microscopy (P...

The present work focuses to understand the limitations towards high temperature applications of plasma sprayed coatings like pure red mud, composited with varying weight % (10, 20 and 50) of fly ash on mild steel. Spraying is done at different operating power namely 9, 12 and 15 kW. Coating characteristics like morphology, thickness and phase forma...

The paper focuses on biodiesel production from kusum oil using esterification reaction followed by transesterification reaction in an in-house batch reactor setup. The effects of methanol to oil ratio (M/O), catalyst amount (H 2 SO 4 and methodoxide) and reaction temperature on acid value and fatty acid methyl esters (FAME) is studied. Product has...

The investigation focuses on evaluating the effect of varying % of Red Mud (RM) reinforcement with Ordinary Portland Slag Cement (OPSC). Characterisation is done by adding 10%, 20%, 30%, 40% and 50% of RM by weight to OPSC. RM + OPSC composite mortars are made in an 8.5 × 5 × 4 cm3 cast iron mould with external vibration keeping water-binder ratio...

The research paper focuses on evaluating the dry sliding wear behaviour of plasma sprayed coatings like red mud (RM), RM + 5% Fly Ash (FA) and RM + 5% FA + 5% Al on mild steel cylindrical shape substrate. Spraying was done at 10 kW operating power level. A conventional pin on disc wear tester is adopted for wear analysis. The wear test was performe...

The research paper focuses on to design a laboratory scale cylindrical fluidized bed column. The column was fabricated successfully having a height of 1.5 m and 5 cm inner diameter. Glass beads of spherical shape are packed up inside the column up to 2.4 cm height having 8 mm size. Sodium Chloride (NaCl) salt water solution of different concentrati...