http://hdl.handle.net/123456789/3371 2026-05-14T15:21:09Z 2026-05-14T15:21:09Z Fatimah, I. Rapei, M. http://hdl.handle.net/123456789/2826 2017-08-11T01:34:46Z 2015-01-01T00:00:00Z

The improvement of montmorillonite activity in 2-butanol dehydration by metal oxide pillarization Fatimah, I.; Rapei, M. Heterogeneous catalysis based on the utilization of natural inorganic material is widely investigated. Among other materials, clay exhibiting interesting physicochemical properties due to its surface area and acidity, but the use of clay facing to the fact that it is not thermal stable in high temperature. In this paper, the improvement on clay properties by pillarization process and study of its role in 2-butanol dehydration were presented. Research steps consist of aluminium oxide, titanium oxide and zinc oxide pillarization to activated natural montmorillonite followed by activity test of pillared material in 2- butanol dehydration. A fluidized bed reactor was used for the catalytic testing and GCMS analysis of the products was performed for the evaluation of catalytic activity, total conversion and the selectivity of the product. Several physicochemical characterization techniques of material were studied by DTATGA, XRD, BET surface area analysis and surface acidity. The role of surface acidity and also pore distribution of the catalysts towards the improvement of 2- butanol conversion into 2-butene and di-sec butyl ether is discussed in this paper

2015-01-01T00:00:00Z Fatimah, I. Rubiyanto, D. Huda, T. Handayani, S. Illahi, O.M. Yudha, S.P. http://hdl.handle.net/123456789/2825 2017-08-11T01:37:36Z 2015-01-01T00:00:00Z

Ni dispersed on sulfated zirconia pillared montmorillonite as bifunctional catalyst in eco-friendly citronellal conversion Fatimah, I.; Rubiyanto, D.; Huda, T.; Handayani, S.; Illahi, O.M.; Yudha, S.P. Preparation of nickel dispersed on sulfated zirconia pillared montmorillonite(Ni/S-Zr/MMT) and its application as catalyst in citronellal conversion was investigated. Preparation of material was conducted by three main steps; zirconia pillarization, sulfation and nickel dispersion. The synthesized material was characterized with FTIR spectroscopy, elemental analysis, x-ray diffraction and gas sorption analyzer and catalytic activity was tested for microwave assisted citronellal conversion via catalytic hydrogen transfer mechanism. The results showed that the obtained material gave high total conversion and demonstrated cyclization, isomerization and hydrogenation mechanism in one pot reaction. The presence of sulfate and nickel in the catalyst play important role within the mechanism.

2015-01-01T00:00:00Z Fatimah, Is Sahroni, I. Putra, H.P. Nugraha, R. Hasanah, U.A. http://hdl.handle.net/123456789/2824 2017-08-11T01:39:00Z 2015-01-01T00:00:00Z

Ceramic membrane based on TiO2-modified kaolinite as a low cost material for water filtration Fatimah, Is; Sahroni, I.; Putra, H.P.; Nugraha, R.; Hasanah, U.A. Ceramic membranes based on TiO2-kaolinite have been prepared using natural kaolinite, and their utilization in water filtration has been examined. This research aimed to evaluate the effect of TiO2 content on the physicochemical character and filtration efficiency of a ceramic membrane using contents of 1, 1.5, 2 and 2.5 wt.% Ti. The characterization of the ceramic membrane with varied Ti contents was performed by X-ray diffraction (XRD) measurement, specific surface area analysis and electron microscope investigation, while filtration capabilitywas evaluated by the analysis of Fe,Mn,NO 3 -chemical oxygen demand (COD), total suspended solid (TSS), total dissolved solid (TDS) and bacteria reduction within the reverse filtration process. It was found that the addition of TiO2 affects the porous formation of the ceramic membrane. From the operational parameter, it was also concluded that themembrane pore influence on thewater quality is shown by Fe,Mn, NO3-and bacteria reduction, while COD, TSS and TDS are not significantly affected. The analysis of the membrane fouling mechanism shows that the distribution of pores in the membrane has a significant influence on the filtration efficiency of the membrane.

2015-01-01T00:00:00Z Fatimah, Is Rubiyanto, D. Huda, T. Zuhrufa, Z. Yudha, S.P. Kartika, N.C. http://hdl.handle.net/123456789/2823 2017-08-11T01:40:11Z 2016-01-01T00:00:00Z

Novel sulphated zirconia pillared clay nanoparticles as catalyst in microwave assisted conversion of citronellal Fatimah, Is; Rubiyanto, D.; Huda, T.; Zuhrufa, Z.; Yudha, S.P.; Kartika, N.C. Preparation of novel sulphated zirconia pillared montmorillonite and saponite clays nanoparticles (SZ/MMT and SZ/SAP) were studied to find a highly active, economist and environment friendly catalysts in the conversion of citronellal into menthol. Sulphated zirconia pillared MMT was prepared by direct sulphation into zirconia pillared MMT, which is a new and fast technique. Comparative study also conducted by evaluating the activity of SZ/MMT with sulphated zirconia nanoparticle (SZ). Material characterisation was performed by X-ray diffraction, Brunauer-Emmett-Teller surface area analysis, scanning electron microscope and also surface acidity by mean pyridine adsorption Fourier transform infrared analysis and total acidity by butylammine titration. Catalytic activity of both SZ/MMT and SZ/SAP was observed in a reaction of citronellal conversion. The operation parameters consist of technique of reaction; tandem cyclisation-hydrogenation and catalytic hydrogen transfer mechanism were investigated. The results show that the pore size of catalyst and the presence of surface acidity affect significantly to increase the isomerisation as well as hydrogenation mechanism. The catalytic hydrogen transfer over microwave irradiation was observed as the more efficient process compared to the tandem cyclisation-hydrogenation from the selectivity of the product and also the other factor influencing the surface mechanism. In another aspect, the results clearly indicated the reusable properties of the sulphated zirconia pillared clay catalysts under varied conditions. Correlation between physicochemical characters and the reaction mechanism is discussed in this study.

2016-01-01T00:00:00Z