Jeeban Poudel
Kongju National University
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Publication
Featured researches published by Jeeban Poudel.
Waste Management | 2015
Jeeban Poudel; Tae-In Ohm; Sang-Hoon Lee; Sea Cheon Oh
Torrefaction is a treatment which serves to improve the properties of biomass in relation to thermochemical processing techniques for energy generation. In this study, the torrefaction of sewage sludge, which is a non-lignocellulosic waste was investigated in a horizontal tubular reactor under nitrogen flow at temperature ranging from 150 to 400°C, for torrefaction residence time varying from 0 to 50 min. The torrefaction kinetics of sewage sludge was studied to obtain the kinetic parameters. The torrefied sewage sludge products were characterized in terms of their elemental composition, energy yield, ash content and volatile fraction. The energy and mass yields decreased with an increase in the torrefaction temperature. From an elemental analysis, the weight percentage of carbon in the sewage sludge increased with an increase in the torrefaction temperature. On the other hand, the weight percentages of hydrogen and oxygen tended to decrease. The gaseous products from torrefaction of sewage sludge were also analyzed. From this work, it was found that the compounds with oxygen were emitted at a temperature lower than that for hydrocarbon gases and the temperatures of 300-350°C were the optimum torrefaction temperatures for sewage sludge.
Korean Journal of Chemical Engineering | 2016
Alyssa Marie Fulgueras; Jeeban Poudel; Dong Sun Kim; Jungho Cho
The separation of ethylenediamine (EDA) from aqueous solution is a challenging problem because its mixture forms an azeotrope. Pressure-swing distillation (PSD) as a method of separating azeotropic mixture were investingated. For a maximum-boiling azeotropic system, pressure change does not greatly affect the azeotropic composition of the system. However, the feasibility of using PSD was still analyzed through process simulation. Experimental vaporliquid equilibrium data of water-EDA system was studied to predict the suitability of thermodynamic model to be applied. This study performed an optimization of design parameters for each distillation column. Different combinations of operating pressures for the low- and high-pressure columns were used for each PSD simulation case. After the most efficient operating pressures were identified, two column configurations, low-high (LP+HP) and high-low (HP+ LP) pressure column configuration, were further compared. Heat integration was applied to PSD system to reduce low and high temperature utility consumption.
Fuel | 2015
Jeeban Poudel; Tae-In Ohm; Sea Cheon Oh
Energies | 2014
Jeeban Poudel; Sea Cheon Oh
Energies | 2012
Jeeban Poudel; Sea Cheon Oh
Energies | 2017
Jeeban Poudel; Malesh Shah; Sujeeta Karki; Sea Cheon Oh
Energies | 2017
Jeeban Poudel; Sujeeta Karki; Nawaraj Sanjel; Malesh Shah; Sea Cheon Oh
Process Safety and Environmental Protection | 2015
Malesh Shah; Jeeban Poudel; Hyun Kwak; Sea Cheon Oh
Journal of Material Cycles and Waste Management | 2017
Jeeban Poudel; Tae-In Ohm; Jae Hoi Gu; Myung Chul Shin; Sea Cheon Oh
Energies | 2018
Jeeban Poudel; Sujeeta Karki; Sea Oh