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KANNAPU HARI PRASAD REDDY,Jyothi Yadagiri,Surendar Moogi,Eilhann E.Kwon,Su Shiung Lam,박영권 한국공업화학회 2021 Journal of Industrial and Engineering Chemistry Vol.94 No.-
In this study, conversion of n-propanal to produce 2-methyl-2-pentenal (C6 compound, a fuel rangeprecursor) was carried out using AMW-SBA-15 catalyst synthesized from activated marble waste (AMW)consisting mainly of Ca2+ and Mg2+ ions. AMW-SBA-15 catalysts with different weight ratios of AMW/Si(6, 12, and 18 wt. %) were prepared using single step sol-gel method. The catalytic activities wereexamined using afixed bed continuous reactor over temperature ranging from 350 425 C underatmospheric pressure. The 12AMW-SBA-15 catalysts showed superior catalytic performance with npropanalconversion of 75 % and C-6 compound selectivity of 81 % at 375 C without the need ofdeactivation for 12 h. To elucidate the structure-activity relationship, all catalysts were characterizedusing a variety of techniques. The superior performance of 12AMW-SBA-15 was ascribed to the highsurface area and smaller particle size as well as the high hydrophobicity, which controlled the hydrationof Ca2+/Mg2+ ions during the reaction.
( Kannapu Hari Prasad Reddy ),( Youna Park ),( Jihyeon Song ),( Young-kwon Park ) 한국공업화학회 2021 공업화학 Vol.32 No.4
Catalytic ozonation of methyl ethyl ketone (MEK) has been examined over mesoporous MnOx/Al<sub>2</sub>O<sub>3</sub> (MA) catalysts developed by a solvent deficient method using two different manganese precursors including manganese chloride (C) and manganese sulfate (S) at room temperature. The maximum catalytic activities of MA with C (MEK removal efficiency and ozone decomposition of 98.4 and 93.7%, respectively) were higher than those of MA with S (MEK removal efficiency and ozone decomposition of 96 and 68%, respectively). Also the catalytic stability of MA with C was much higher than that of MA with S. The physico-chemical properties of catalysts are well correlated with the activity results, which confirmed that fine dispersion of MnOx species with high ratios of Mn<sup>3+</sup>/Mn<sup>4+</sup> and more acid sites are attributed to the higher catalyst stability for the MA-C catalyst.
Veeralakshmi Vaddeboina,Hari Prasad Reddy Kannapu,전종기,박영권,Kuthati Bhaskar 한국화학공학회 2022 Korean Journal of Chemical Engineering Vol.39 No.1
This study examined the role of the support material on the coupling of 1,4-butanediol (BDO) dehydrogenation and nitrobenzene (NB) hydrogenation over copper-based catalysts. The catalysts, 10Cu/MgO (10CM), 10Cu/ Al2O3 (10CA), 10Cu/MgO-Al2O3 (10CMA), and 10Cu/SiO2 (10CS), were prepared using the impregnation method. The coupling reaction results conducted at 250 oC were compared with those of the individual reactions. The individual BDO dehydrogenation to -butyrolactone (GBL) conversion (99%) and hydrogenation of NB to aniline (AN) conversion (85 %) were high over 10CS. In contrast, 10CA produced tetrahydrofuran (THF) as a major product from BDO. Interestingly, the coupling process over the 10CM catalyst produced the best performance in converting NB (65%) to AN (99%) and BDO (85%) to GBL (99%). The superior performance of Cu/MgO in coupling process catalyst is mainly due to the high hydrogen adsorption ability compared to the other catalysts under limited hydrogen environments, which helps retain the active hydrogen on the catalyst surface for a longer time. The characterization of the catalysts showed that a high basic nature and the optimal amount of active copper sites (Cu0/Cu1+) are responsible for the best performance of 10CM, followed by 10CS and 10CMA.
Abid Farooq,Surendar Moogi,장성호,KANNAPU HARI PRASAD REDDY,Soheil Valizadeh,Ashfaq Ahmed,Su Shiung Lam,박영권 한국공업화학회 2021 Journal of Industrial and Engineering Chemistry Vol.94 No.-
Steam-gasification of linear low-density polyethylene (LLDPE) waste to hydrogen-rich gas has beenstudied systematically over nickel (10 wt.%) loaded on a variety of supports (Al2O3, CeO2, and CeO2-ZrO2)synthesized using a novel solvent deficient method (SDM). The hydrogen selectivity order of the catalystswas reported as Ni/CeO2-ZrO2>Ni/CeO2>Ni/Al2O3. The highest catalytic H2 selectivity of the Ni/CeO2-ZrO2 catalyst was reported to be76 vol.%, and was attributed to the smaller nickel crystals that werefinely dispersed on the support, and to formation of Ce1-xZrxO2-d solid solutions. The Ce1-xZrxO2-d solidsolution in the Ni/CeO2-ZrO2 catalyst was observed to be bi-functional, thus reflecting the acceleration ofthe water gas shift and the oxidation of carbon to CO and CO2. The better resistance of the Ni/CeO2-ZrO2catalyst towards coke deposition also indicated its potential for commercial-scale applications for thesteam gasification of plastics. Therefore, this research provides an advanced route to recycle LLDPE plasticwaste into hydrogen fuel, which presents both economical and environmental benefits.