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천연제올라이트 촉매에 의한 톨루엔 불균화반응
Toluene Disproportionation Reaction with Acid-Treated Natural Zeolite Catalyst
HWAHAK KONGHAK, June 1977, 15(3), 161-168(8), NONE
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Abstract
경북 구룡포 지역에서 산출되는 일부 mordenite 성분을 포함한 천연제올라이트를 산처리한 촉매를 사용하여 고정층반응기에서의 톨로엔 불균화 반응에 대한 실험이 행해졌다. 반응온도와 공간시간이 증가할수록 전화율은 증가했으며 크실렌의 선택도는 공간시간의 증가에 대해 뚜렷한 감소를 보였다. 고온에서의 높은 활성저 하는 수소의 공급량을 높임으로써 어느정도 방지할 수 있었으며, 사용한 촉매의 재생능력에 있어서는 재생회수가 증가할수록 초기점성은 점진적으로 감소했으나 반응시간에 따른 활성저 하는 훨씬 적어지는 걸로 나타났다.
The effects of operating conditions on conversion and selectivity for toluene disproportionation reaction in a packed-bed reactor were investigated with the catalyst which is prepared by treating natural zeolite mined in Kuryongpo, Kyungsang-bukdo with hydrochloric acid solutions. The experimental results showed that toluene conversion increased with an increase in the reaction temperature or space time. Xylene selectivity decreased with an increase in space time. Deactivation by coke deposition decreased with an increase in hydrogen to toluene mole ratio. Regeneration of spent catalysts resulted in a slight decrease in the initial activity and a marked improvement in deactivation characteristics.