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장태선(Tae-Sun Chang),박정현(Jung-Hyun Park),강태진(Tae-Jin Kang),노종선(Jong Seon Roh),허융진(Yung Jin Hur),박상규(Sangkyu Park) 한국에너지기후변화학회 2017 에너지기후변화학회지 Vol.12 No.2
In this study, the adsorbent derived from water treatment sludge was prepared and characterized via various analytical tools such as N2-sorption, XRD, XRF, and NH₃/CO₂-TPD. The adsorbent and activated carbon were applied for the removal of hazardous gases of ammonia, form aldehyde, and benzene, etc. The activated carbon and adsorbent possessed the surface area of around 543.2 ㎡/g and 93.3 ㎡/g, respectively. The adsorbent had a large amount of acid and base properties in NH₃/CO₂-TPD analyses, while the activated carbon was negligible level. For NH₃/HCHO test, despite the low surface area of the adsorbent, the adsorbent displayed a similar removal efficiency compared with the activated carbon due to the chemical adsorption caused by the acid-base properties. However, the activated carbon showed a better efficiency in benzene/toluene test than that of the adsorbent due to a large surface area.
몰리브덴인산화물 촉매에 의한 메틸피라진의 가암모니아 산화반응
신채호,장태선,조득희,이동구,이영길 ( Chae Ho Shin,Tae Sun Chang,Deug Hee Cho,Dong Koo Lee,Young K . Lee ) 한국공업화학회 1997 공업화학 Vol.8 No.5
몰리브덴산암모늄염과 인산의 반응으로 P/Mo=0.6의 비율을 가진 몰리브덴인산화물을 제조하고 이를 촉매로 사용하여 메틸피라진의 가암모니아 산화반응에 대한 메틸피라진, 산소, 암모니아의 각각의 분압과 반응온도 등의 반응변수의 영향을 살펴보았다. 표준실험조건하의 반응에서 300시간까지의 촉매활성은 안정상태를 유지하였다. 안정화 상태에서의 메틸피라진의 가암모니아 산화반응 속도식은 -r=kP_MPP_NH3 °P_02^γ(γ=2.2;1.3≤P_02(kPa)≤4)으로 메틸피라진에 대해서는 1차, 암모니아에 대해서는 0차, 산소에 대해서는 분압 4kPa이하에서 2.2차로 나타났다. 623 K이하의 반응온도 하에서의 겉보기 활성화에너지는 29.6㎉/㏖이었다. 메틸피라진의 주생성물은 시아노피라진으로서 선택도는 전환율에 관계없이 항상 90%이상을 유지하였다. Molybdenum phosphate(P/Mo = 0.6) has been synthesized with ammonium molybdate and phosphoric acid under aqueous solution. The kinetics of the ammoxidation of methylpyrazine over molybdenum phosphate catalyst was investigated with the variation of reaction temperature and partial pressure of methylpyrazine, oxygen and ammonia, respectively at atmospheric pressure. The catalytic activity was constant for 300hrs operation under our experimental conditions. Under the steady-state condition, the rate equation of methylpyrazine was shown as -r=kP_MPP_NH3 °P_02^γ(γ=2.2;1.3≤P_02(kPa)≤4). The apparent activation energy was 29.6㎉/㏖ below 623K. The main product obtained in the ammoxidation of methylpyrazine is cyanopyrazine whose selectivity was kept always over 90% regardless of conversion.
신채호(Chae Ho Shin),장태선(Tae Sun Chang),조득희(Deug Hee Cho),이동구(Dong Koo Lee),이영길(Young K . Lee) 한국화학공학회 1997 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.35 No.2
Metal Phosphates containing respectively molybdenum, vanadium, iron, titanium and zirconium were prepared by the reaction with metal salt and phosphoric acid in the medium of water. Phase transformation of the metal phosphate was detected by X-ray diffraction and thermogravimetric analysis. Molybdenum phosphate catalyst had the best catalytic activity in ammoxidation of 3-picoline. The solid phase (NH₄)₃PO₄·12MoO₃·xH₂O was detected by XRD analysis in the catalyst with P/Mo=0.5 atomic ratio and MoOPO₄ was observed in P/Mo=1.0 catalyst after ammoxidation for 24 hrs. The correlation between conversion of 3-picoline and selectivity of 3-cyanopyridine has the proportional relation. The increase of 3-cyanopyridine selectivity depends on the decrease of amide plus acid selectivity.
몰리브덴인산화물에서의 3- 피콜린의 가암모니아 산화반응 속도론
신채호(Chae Ho Shin),장태선(Tae Sun Chang),조득희(Deug Hee Cho),이동구(Dong Koo Lee),이영길(Young K . Lee) 한국화학공학회 1997 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.35 No.3
Molybdenum phosphate(P/Mo=1.0) has been synthesized with ammonium molybdate and phosphoric acid under aqueous solution. The kinetics of ammoxidation of 3-picoline over the molybdenum phosphate catalyst were investigated with the variation of reaction temperature and partial pressure of 3-picoline, oxygen, and ammonia, respectively at atmospheric pressure. The catalytic activity was increased until 300 hrs on stream and then maintained until 500 hrs on stream under our experimental conditions, At the steady-state conditions, the rate equation of 3-picoline ammoxidation was shown as -r=kP₃_pP^0_(NH₃) P^γ_(o₂)[γ=0.2;0.25≤P_(o₂)(㎪)≤:5γ=0;5≤P_(o₂)(㎪)]. The correlation between the conversion of 3-picoline and the selectivity of 3-cyanopyridine had the proportional relationship. As the selectivity of 3-cyanopyridine increases, the selectivity of amide and acid decreases.