공업화학 (Applied Chemistry for Engineering)

  • 제25권3호
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  • Pages.286-291
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  • 2014
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  • 1225-0112(pISSN)
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  • 2288-4505(eISSN)
한국공업화학회 (The Korean Society of Industrial and Engineering Chemistry)
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다양한 실리카 원과 결정화 촉진제를 이용한 나노크기의 TPA-Silicalite-1 제조

Preparation Nanosized TPA-Silicalite-1 with Different Silica Sources and Promoters

  • 정상진 (경성대학교 신소재공학과)
  • Jung, Sang-Jin (Department of Advanced Materials Engineering, Kyungsung University)
  • 투고 : 2014.03.22
  • 심사 : 2014.05.08
  • 발행 : 2014.06.10
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초록

본 연구에서는 기체 분리를 위한 제올라이트 세라믹 멤브레인 제조에 적합한 입자크기와 형상을 갖춘 나노크기의 제올라이트를 TPAOH : $SiO_2$ : $H_2O$의 적합한 조성으로 합성하였으며 그 특성을 분석하였다. 실리카 원으로는 TEOS, LUDOX AS-40, CAB-O-SIL을 사용하고, TPAOH와 함께 출발물질로 하여 특정 조성의 TPAOH, $SiO_2$, $H_2O$ gel을 합성하고, $NaH_2PO_4$ 및 다양한 산 염기를 결정화 촉진제로 사용하였다. 합성시간을 단축할 수 있는 방법의 일환으로 저온에서 2단계 온도 변화법을 적용한 수열합성법으로 TPA-Silicalite-1을 합성하였으며 XRD, SEM, BET, TGA 등을 사용하여 분석하였다. 그 결과, 2단계 온도 변화법을 사용하고, 결정화 촉진제로서 $NaH_2PO_4$를 사용하였을 때가 최적의 합성 조건으로 입자크기100 nm, 비표면적 $416m^2/g$의 TPA-Silicalite-1 분말을 제조할 수 있었다.

In this study, nanosized TPA-silicalite-1 was synthesized with a suitable molar composition of TPAOH: $SiO_2$: $H_2O$ for the development of zeolite ceramic membranes to utilize as gas separation. As silica sources, TEOS, LUDOX AS-40 and CAB-O-SIL were used with the starting material of TPAOH. $NaH_2PO_4$, and a variety of acids and bases were used as promoters after TPAOH, $SiO_2$, $H_2O$ gel synthesis. To decrease synthesis time, a two step temperature change method was applied to the synthesis of TPA-silicalite-1 at a low temperature. TPA-silicalite-1 synthesized was analyzed with XRD, SEM, BET and TGA. As a result, TPA-silicalite-1 powders with a particle size of 100 nm and a specific surface area of $416m^2/g$ were obtained as optimum synthesis conditions when the two stage temperature change method was used with $NaH_2PO_4$ as promoter.

키워드

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