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타이타니아계 촉매상에서의 CO 에 의한 SO2 환원 반응
우희철,이진우,이병선,하기성,박대원,정종식 ( Hee Chul Woo,Jin Woo Lee,Byung Sun Lee,Ki Sung Ha,Dae Won Park,Jong Shik Chuhg ) 한국공업화학회 1997 응용화학 Vol.1 No.1
A series of MO_x(transition metal oxides)/TiO₂ powder mixture were studied as catalysts for the reduction of SO₂ by CO to elemental sulfur. Among these catalysts, SnO₂/TiO₂ was found to be the most effective catalyst for the reaction. When the catalyst was a mixture of SnO₂ and TiO₂ the activity increased drastically. Experimental evidence of the formation of a stable COS was obtained from a two-stage reactor system and TPR. XRD data of the used catalyst showed the presence of SnS₂, SnS and TiO_(2-x) phases. In the reaction system, an equilibrium is established between SnS₂ and SnS, which acts as a medium for sulfur supply in the formation of COS. From the above results, a mechanism based on formation of COS intermediate and catalyst bifunctionality is proposed for the SO₂ reduction by CO.
K2CO3 가 첨가된 MoS2 촉매에 의한 일산화탄소와 수소로부터의 혼합알콜 제조
이재성,김영걸,남인식,정종식,문상흡,우희철 한국화학공학회 1990 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.28 No.5
일산화탄소와 수소로부터, 혼합알콜 합성반응을 K₂CO₃를 조촉매로 하는 MoS₂계 촉매상에서 수행하여, 반응활성 및 선택도에 미치는 조촉매 함량, 온도, 압력 등의 영향을 고정층의 고압 촉매 반응기에시 조사하였다. 제조된 MoS₂ 촉매는 활성에 있어 우수한 안정성을 보였으며 C₁-C_6 범위의 직쇄상 알콜에 대해 높은 선택도를 나타내었다. 또한 알콜 생산량에 대한 최적 반응 조건은 조촉매 함량 17wt%, 온도 300℃이었으며, 압력의 증가는 알콜 수율을 증가시켰다. 이 때 알콜 생성물의 탄소수에 따른 분포는 전형적인 Schulz-Flory 분포를 만족하였다. The effects of K₂CO₃ content, reaction temperature and pressure on the activity and selectivity of MoS₂ catalyst for the catalytic hydrogenation of CO producing mixed alcohols were investigated in a high pressure fixed bed reactor. A MoS₂ catalyst promoted with K₂CO₃ showed stable activity and high selectivity for C₁-C_6 linear alcohols. The optimal conditions of this reaction system in terms of alcohol productivity were 17 wt% K₂CO₃ content on the catalyst and 300℃ of reaction temperature. The amount of alcohol production depends on the reactor pressure: the higher the reactor pressure, the higher the alcohol yield. The product distribution of C₁-C_6 alcohols was well correlated by the Schulz-Flory distribution.