Catalytic conversion of methanol to propylene over high-silica mesoporous ZSM-5 zeolites prepared by different combinations of mesogenous templates

Abstract Tin incorporation in high-silica ZSM-12 zeolite was evaluated using different concentrations of tin and different structure-directing agents (SDA), in order to be used in the glucose isomerization reaction in fructose. The tetraethylammonium hydroxide SDA successfully formed the structure of the high silica zeolite ZSM-12; however, in this system, the addition of Sn prevented the formation of the ZSM-12 zeolite. Therefore, tetraethylammonium bromide was used as SDA, but the syntheses of high-silica ZSM-12 zeolite without and with tin incorporation were not effective. Then methyltriethylammonium chloride was used as SDA, and the high-silica ZSM-12 structure was formed only with the incorporation of tin. The samples with ZSM-12 structure and different concentrations of tin were evaluated in reaction of glucose conversion to fructose. It was found that the sample with the lowest tin content ( Sn / Si = 0 . 005 ) achieved the highest glucose conversion and the highest fructose yield.

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Selective catalytic conversion of bio-oil over high-silica zeolites

Bioresource Technology ◽

10.1016/j.biortech.2014.12.046 ◽

2015 ◽

Vol 179 ◽

pp. 518-523 ◽

Cited By ~ 28

Author(s):

Wahyu Bambang Widayatno ◽

Guoqing Guan ◽

Jenny Rizkiana ◽

Xiao Du ◽

Xiaogang Hao ◽

...

Keyword(s):

Catalytic Conversion ◽

Bio Oil ◽

High Silica ◽

High Silica Zeolites

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Obtaining of high-octane components by conversion of hydrocarbon raw material on high-silica zeolites

Chemistry & Chemical Technology ◽

10.23939/chcht01.01.041 ◽

2007 ◽

Vol 1 (1) ◽

pp. 41-44

Author(s):

Vasyl Shevchuk ◽

◽

Olexandra Macyak ◽

Ludmila Babyak ◽

◽

...

Keyword(s):

Optimal Condition ◽

Catalytic Conversion ◽

Raw Material ◽

Motor Fuels ◽

High Silica ◽

High Silica Zeolites ◽

High Octane

Catalytic conversion of gaseous alkanes, alkenes and gasoline fractions over high-silica zeolites of ZSM-5 type has been studied. The optimal condition for the production of high-octane components of motor fuels over ZVM+2% mass of Zn modified catalyst and non-modified catalyst ZVN have been established

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Variations in Surface Textures of Quartz Sand using Electron Microscopy

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100069466 ◽

1970 ◽

Vol 28 ◽

pp. 494-495

Author(s):

Eugene J. Amaral

Keyword(s):

Electron Microscopy ◽

Glass Industry ◽

Glass Slide ◽

Distilled Water ◽

Early Paleozoic ◽

Secondary Effects ◽

Surface Textures ◽

High Silica ◽

Sand Deposit ◽

The U.S

Examination of sand grain surfaces from early Paleozoic sandstones by electron microscopy reveals a variety of secondary effects caused by rock-forming processes after final deposition of the sand. Detailed studies were conducted on both coarse (≥0.71mm) and fine (=0.25mm) fractions of St. Peter Sandstone, a widespread sand deposit underlying much of the U.S. Central Interior and used in the glass industry because of its remarkably high silica purity.The very friable sandstone was disaggregated and sieved to obtain the two size fractions, and then cleaned by boiling in HCl to remove any iron impurities and rinsed in distilled water. The sand grains were then partially embedded by sprinkling them onto a glass slide coated with a thin tacky layer of latex. Direct platinum shadowed carbon replicas were made of the exposed sand grain surfaces, and were separated by dissolution of the silica in HF acid.

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