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제올라이트 쉬트 담지 백금촉매의 제조 및 톨루엔 연소 특성
김진배 ( Jin Bae Kim ),임나래 ( Na Rae Im ),김홍수 ( Hong Soo Kim ),유윤종 ( Yoon Jong Yoo ) 한국공업화학회 2011 공업화학 Vol.22 No.3
원통형으로 성형된 zeolite sheet (제올라이트를 함유하는 세라믹 종이)는 VOC 제거를 위한 효과적인 흡착로터로서 사용될 수 있다. 본 연구에서는 ZSM-5가 함유된 zeolite sheet 지지체에 Pt를 담지한 후 톨루엔 연소 촉매 성능을 γ-Al2O3 및 cordierite honeycomb 지지체에 담지된 Pt 촉매와 비교하였다. Pt/zeolite sheet 촉매는 Pt/γ-Al2O3 또는 Pt/cordierite honeycomb 촉매에 비하여 톨루엔 연소반응에 높은 활성을 나타냈다. 한편, Pt/zeolite sheet 촉매를 상온에서 NH3-H2O 증기로 전처리하면 zeolite sheet에 담지된 Pt 입자의 분산도가 향상되었으며, 톨루엔 연소 촉매 활성이 크게 증가하였다. A zeolite sheet (ceramic paper containing zeolite) made in a cylindrical configuration can be applied to a honeycomb rotor for the effective VOC removal. In this study, the zeolite sheet containing ZSM-5 was used as a support for Pt-loading, and its catalytic activity for the toluene combustion reaction was compared with those of the other Pt catalysts loaded on γ-Al2O3 and cordierite honeycomb. Pt/zeolite sheet catalyst showed a higher activity for toluene combustion reaction than that of Pt/γ- Al2O3 or Pt/cordierite honeycomb. On the other hand, the dispersion of Pt particles loaded on the zeolite sheet was improved by the pretreatment with NH3-H2O vapor at room temperature. Consequently, the pretreatment of Pt/zeolite sheet by NH3-H2O vapor significantly enhanced the catalytic activation for toluene combustion reaction.
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Adjuvant에 의한 농약살포액의 물리성 개선 및 약효증진 효과
진용덕(Yong-Duk Jin),이희동(Hee-Dong Lee),유오종(Oh-Jong You),김진배(Jin-Rae Kim),권오경(Oh-Kyung Kwon) 한국농약과학회 2008 농약과학회지 Vol.12 No.4
This study was carried out to elucidate the effects of adjuvants on physicochemical properties and pest control efficacy of pesticide spray solution. Spray droplet sizes of pesticide solution decreased by addition of adjuvants even though its effect varied according to the pesticides. The adhesive effect of pesticides sprayed on target crops by addition of adjuvants varied according to the properties, the application methods, and the spray volume of pesticides. Wash-off of the deposited amount of active ingredients of the solution of tricyclazole WP and fenobucarb EC by simulated rainfall after spraying on rice plants dramatically reduced by adding adjuvants. The retained amount of active ingredients of the pesticides were 1.5~4.1 times higher than those without adjuvants when subjected to simulated rainfall 6 hours after spraying. Addition of adjuvants to the propanil EC spray solution enhanced the control efficacy in barnyard grass, Echinocloa crus-galli Beauv. by 8~30%, which showed a potential to reduce pesticide use.
ScienceON
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