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Development of Treatment Process for Residual Coal from Biosolubilization
Rifella, Archi,Shaur, Ahmad,Chun, Dong Hyuk,Kim, Sangdo,Rhim, Young Joon,Yoo, Jiho,Choi, Hokyung,Lim, Jeonghwan,Lee, Sihyun,Rhee, Youngwoo The Korean Society of Clean Technology 2018 청정기술 Vol.24 No.2
This study introduced a treatment process that was developed to treat Indonesian low-rank coal with high-ash content, which has the same characteristics as residual coal from the biosolubilization process. The treatment process includes separation of ash, solid-liquid separation, pelletizing, and drying. To reduce the ash content, flotation was performed using 4-methyl-2-pentanol (MIBC) as frother, and kerosene, waste oil, and cashew nut shell liquid (CNSL) as collectors. The increasing amount of collector had an effect on combustible coal recovery and ash reduction. After flotation, a filter press, extruder, and an oven drier were used to make a dried coal pellet. Then another coal pellet was made using asphalt as a binder. The compressive strength and friability of the coal pellets were tested and compared.
Development of Treatment Process for Residual Coal from Biosolubilization
Archi Rifella,Ahmad Shaur,Dong Hyuk Chun,Sangdo Kim,Young Joon Rhim,Jiho Yoo,Hokyung Choi,Jeonghwan Lim,Youngwoo Rhee 한국청정기술학회 2018 청정기술 Vol.24 No.2
This study introduced a treatment process that was developed to treat Indonesian low-rank coal with high-ash content, which has the same characteristics as residual coal from the biosolubilization process. The treatment process includes separation of ash, solid-liquid separation, pelletizing, and drying. To reduce the ash content, flotation was performed using 4-methyl-2-pentanol (MIBC) as frother, and kerosene, waste oil, and cashew nut shell liquid (CNSL) as collectors. The increasing amount of collector had an effect on combustible coal recovery and ash reduction. After flotation, a filter press, extruder, and an oven drier were used to make a dried coal pellet. Then another coal pellet was made using asphalt as a binder. The compressive strength and friability of the coal pellets were tested and compared.
Rehman, Saeed Ur,Shaur, Ahmad,Song, Rak-Hyun,Lim, Tak-Hyoung,Hong, Jong-Eun,Park, Seok-Joo,Lee, Seung-Bok Elsevier 2019 Journal of Power Sources Vol.429 No.-
<P><B>Abstract</B></P> <P>The cost-effective fabrication of nanostructured cathodes for solid oxide fuel cells (SOFCs) that catalyze the oxygen reduction reaction effectively is a milestone to be achieved. Infiltration being the conventional method for the fabrication of nanostructured SOFC cathodes requires many infiltration and calcination cycles due to the low catalyst loading per infiltration cycle. Chemically assisted electrodeposition (CAED), a new means of fabricating nanostructured SOFC cathodes in a single loading step, provides the advantage of the simultaneous deposition of multiple cations while using dilute aqueous solutions of readily available salts. In this study, CAED is demonstrated by fabricating a cobalt-free LaNiO<SUB>3</SUB>/GDC composite cathode. The LaNiO<SUB>3</SUB>/GDC composite cathode prepared by CAED exhibits superior electrochemical properties compared to LaNiO<SUB>3</SUB>/GDC composite cathodes fabricated by sintering or self-assembly (a recently introduced low-temperature SOFC cathode fabrication method) approaches. An anode-supported SOFC with a LaNiO<SUB>3</SUB>/GDC composite cathode fabricated by CAED shows a high power density of 974 mW cm<SUP>−2</SUP> at an intermediate operating temperature of 750 °C. Low-temperature nano-fabrication by CAED, producing a cathode with a high surface area while avoiding the formation of insulating phases, is believed to play an important role in achieving better SOFC performance.</P> <P><B>Highlights</B></P> <P> <UL> <LI> LaNiO<SUB>3</SUB> was successfully nanofabricated by chemically assisted electrodeposition. </LI> <LI> Chemically assisted electrodeposition enabled LaNiO<SUB>3</SUB> incorporation in a single step. </LI> <LI> LaNiO<SUB>3</SUB> showed a uniform morphology throughout the body of the cathode layer. </LI> <LI> Nanofabricated LaNiO<SUB>3</SUB> cathode showed a performance of 974 mWcm<SUP>−2</SUP> at 750 °C. </LI> <LI> Chemically assisted electrodeposition shows promise for SOFC electrode fabrication. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>