Nanosulfated Silica as a Potential Heterogeneous Catalyst for the Synthesis of Nitrobenzene

서지정보

ㆍ발행기관 : 한국재료학회 ㆍ수록지정보 : 한국재료학회지 / 33권 / 7호
ㆍ저자명 : Khairul Amri, Aan Sabilladin, Remi Ayu Pratika, Ari Sudarmanto, Hilda Ismail, Budhijanto, Mega F ia L estari, Won-Chun Oh, Karna Wijaya

목차

1. Introduction
2. Experimental
2.1. Materials
2.2. Catalyst synthesis and nitrobenzene production
2.3. Conversion benzene into nitrobenzene
2.4. Catalyst and nitrobenzen peroduct characterization
3. Result and Discussion
3.1. FTIR analysis of H2SO4/SiO2 catalysts
3.2. XRD analysis of H2SO4/SiO2 catalysts
3.3. SAA analysis
3.4. Conversion of benzene into nitrobenzene
4. Conclusion
Acknowledgement

영어 초록

In this study, the synthesis of nitrobenzene was carried out using sulfated silica catalyst. The study delved into H2SO4/SiO2 as a solid acid catalyst and the effect of its weight variation, as well as the use of a microwave batch reactor in the synthesis of nitrobenzene. SiO2 was prepared using the sol-gel method from TEOS precursor. The formed gel was then refluxed with methanol and calcined at a temperature of 600 °C. SiO2 with a 200-mesh size was impregnated with 98 % H2SO4 by mixing for 1 h. The resulting 33 % (w/w) H2SO4/SiO2 catalyst was separated by centrifugation, dried, and calcined at 600 °C. The catalyst was then used as a solid acid catalyst in the synthesis of nitrobenzene. The weights of catalyst used were 0.5; 1; and 1.5 grams. The synthesis of nitrobenzene was carried out with a 1:3 ratio of benzene to nitric acid in a microwave batch reactor at 60 °C for 5 h. The resulting nitrobenzene liquid was analyzed using GC-MS to determine the selectivity of the catalyst. Likewise, the use of a microwave batch reactor was found to be appropriate and successful for the synthesis of nitrobenzene. The thermal energy produced by the microwave batch reactor was efficient enough to be used for the nitration reaction. Reactivity and selectivity tests demonstrated that 1 g of H2SO4/SiO2 could generate an average benzene conversion of 40.33 %.

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