Ramagopal V.S. Uppaluri

Prof. Ramagopal V.S. Uppaluri

Department of Chemical Engineering, Indian Institute of Technology Guwahati, Guwahati, India

Research Focus & Metrics

Academic Career Length

18Years (2009-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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1 January 2017 in International Journal of Biological Macromolecules
Verified
Journal Article
Closed access
SNSrinu Nagireddi
Srinu Nagireddi
VKVimal Katiyar
Vimal Katiyar
Ramagopal V.S. UppaluriRamagopal V.S. Uppaluri
Ramagopal V.S. Uppaluri

1 June 2019 in International Journal of Biological Macromolecules
Verified
Journal Article
Closed access
ADAritra Das
Aritra Das
Ramagopal V.S. UppaluriRamagopal V.S. Uppaluri
Ramagopal V.S. Uppaluri
CDChandan Das
Chandan Das

26 January 2023 in Chemical Engineering Journal
Verified
Journal Article
Closed access
PPPrabhat Kumar Patel
Prabhat Kumar Patel
LPLalit Mohan Pandey
Lalit Mohan Pandey
Ramagopal V.S. UppaluriRamagopal V.S. Uppaluri
Ramagopal V.S. Uppaluri

21 August 2009 in Separation Science and Technology
Verified
Journal Article
Closed access
BNB. K. Nandi
B. K. Nandi
Ramagopal V.S. UppaluriRamagopal V.S. Uppaluri
Ramagopal V.S. Uppaluri
MPMihir K Purkait
Mihir K Purkait
This work addresses the applicability of different membrane pore blocking models for the prediction of flux decline mechanisms during dead end microfiltration (MF) of stable oil-in-water (o/w) emulsions using relatively low-cost ceramic membranes. Circular disk type membranes (52.5 mm diameter and 4.5 mm thickness) were prepared by the paste method using locally available low-cost inorganic precursors such as kaolin, quartz, calcium carbonate, sodium carbonate, boric acid, and sodium metasilicate. Characterization of the prepared membrane was done by SEM analysis, porosity determination, and pure water permeation through the membrane. Hydraulic pore diameter, hydraulic permeability, and hydraulic resistance of the membrane was evaluated as 0.7 µm, 1.94 × 10−6 m3/m2·s·kPa and 5.78 × 1011 m2/m3, respectively. The prepared membrane was used for the treatment of synthetic stable o/w emulsions of 40 and 50 mg/L crude oil concentration in batch mode with varying trans-membrane pressure differentials ranging from 41.37 to 165.47 kPa. The membrane exhibited 96.97% oil rejection efficiency and 21.07 × 10−6 m3/m2·s permeate flux after 30 min of experimental run at 165.47 kPa trans-membrane pressure for 50 mg/L oil concentration. Different pore blocking, models such as complete pore blocking, standard pore blocking, intermediate pore blocking and cake filtration were used to gain insights into the nature of membrane fouling during permeation. The observed trends for flux decline data convey that the decrease in permeate flux was initially due to intermediate pore blocking (during 1 to 10 minutes of experimental run) followed with cake filtration (during 10 to 30 minutes of experimental run). Based on retail prices of the inorganic precursors, the membrane cost was estimated to be 130 $/m2. Finally, preliminary process economic studies for a single stage membrane plant were performed for the application of the prepared membrane in industrial scale treatment of o/w emulsions. A process economics study inferred that the annualized cost of the membrane plant would be 0.098 $/m3 feed for treating 100 m3/day feed with oil concentration of 50 mg/L.

5 October 2023 in Applied Food Research
Verified
Journal Article
Open access
KWKhalid Mehmood Wani
Khalid Mehmood Wani
Ramagopal V.S. UppaluriRamagopal V.S. Uppaluri
Ramagopal V.S. Uppaluri

1 December 2018 in Colloids and Surfaces A: Physicochemical and Engineering Aspects
Verified
Journal Article
Closed access
RSRahul Saha
Rahul Saha
Ramagopal V.S. UppaluriRamagopal V.S. Uppaluri
Ramagopal V.S. Uppaluri
PTPankaj Tiwari
Pankaj Tiwari