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Papers by Masataka Kamitani
Funtai Kōgakkaishi, 1999
The Proceedings of the Fluids engineering conference, 2016
Journal of the Ceramic Society of Japan, 1992
Journal of the Society of Powder Technology, Japan, 2018
Resources Processing, 2017
Perlite is an amorphous aluminum silicate, mainly composed of SiO 2 and Al 2 O 3. In this study, ... more Perlite is an amorphous aluminum silicate, mainly composed of SiO 2 and Al 2 O 3. In this study, we tried to synthesize LTA type zeolite from a perlite as a starting material. It was found that the mechano-chemical treatment (milling process) for perlite as a raw material resulted in the activation of its surface. As a result, fine LTA-type zeolites were preferentially synthesized for perlite with surface activated by mechano-chemical treatments.
DEStech Transactions on Engineering and Technology Research, 2017
Perlite is an amorphous aluminum silicate, mainly composed of SiO 2 and Al 2 O 3. In this study... more Perlite is an amorphous aluminum silicate, mainly composed of SiO 2 and Al 2 O 3. In this study, we tried to synthesize FAU type zeolite from a perlite as a starting material. It was found that the mechano-chemical treatment (milling process) for perlite as a raw material resulted in the activation of its surface. As a result, nano-sized FAU-type zeolites with higher Si/Al ratio were preferentially synthesized for perlite with surface activated by mechano-chemical treatments.
Journal of the Japan Society of Powder and Powder Metallurgy, 2015
In order to construct the resources circulation society in Japan, we investigated the material re... more In order to construct the resources circulation society in Japan, we investigated the material recycling methods on huge amount of wasted glasses. Because wasted glasses could be chemically activated by ball milling method, and we tried to modify up to the environmental clean-up materials. The self-hardening phenomenon was confirmed from ball milled wasted liquid crystal display panel glasses after alkaline treatment. The characterization of the hardened samples was carried out. These results showed that the self-hardening induced mechano-chemical effects will open a new method for wasted glass utilizations.
Journal of the Society of Powder Technology, Japan, 2016
Key Engineering Materials, 2014
Synthesis of monolithic A-type zeolite (LTA) was attempted by hydrothermal processing from recycl... more Synthesis of monolithic A-type zeolite (LTA) was attempted by hydrothermal processing from recycling flat glass. Crashed flat glass were pretreated and subsequently hydrothermally treated at 95°C for 24 h. As a result, monolithic A-type zeolite without another phase was successfully synthesized by the hydrothermal treatments. The synthetic condition was clarified during the pretreatment and hydrothermal treatments. The development of hydrothermal process for recycle of flat glass was carried out since the monolithic A-type zeolite was obtained under the optimum synthetic conditions (reaction temperatures, reaction time and pretreatment conditions etc).
Journal of the Ceramic Society of Japan, 2014
The samples from A-type zeolite and ground soda-lime glass powders were solidifed by calcinations... more The samples from A-type zeolite and ground soda-lime glass powders were solidifed by calcinations at 600 to 800°C in air atmosphere. These hybrid zeolite/glass samples at 700°C were in part insufficiently densified and hybrid samples were fully densified at 800°C, although the densification was not generated at 600°C. A-zeolites were still stable in glass melt at 800°C for hybrid zeolite/glass samples. These hybrid zeolite/glass samples had the ion exchange ability of 20% against Sr 2+ and the high ability over 80% against Cs + as well as A-zeolite. Microstructures of obtained hybrid zeolite/glass samples were evaluated.
Journal of the Society of Powder Technology, Japan, 2018
Friedel's salt is typical insoluble chloride in municipal waste incinerator ash. In the eco-cemen... more Friedel's salt is typical insoluble chloride in municipal waste incinerator ash. In the eco-cement that made using by that ash for parts of raw materials, when remain chlorides induces the salt damage on its concrete materials, so its problems might disturbs its utilization in market. In order to remove insoluble salt in ash, we used the carbonation and milling techniques to laboratory synthesized Friedel's salt and it recognized good results as, contacting with 0.1 mol/l sodium bicarbonate solution and milling method made it high chloride solubility into water. However in some case, it observed recrystallization of Friedel's salt from solutions and might be chloride ion re-catching onto the amorphous salt surfaces. It means the importance of process control. Moreover, it understands the possibilities of detection of H + movements during carbonation reaction using by at the pulse NMR method in this experiments. In these results, problems about to construct the dechloride processing became clear.
Advanced Powder Technology, 2005
Polyvinyl chloride (PVC) powder was ground with one of two dried alkaline additives, i.e. KOH and... more Polyvinyl chloride (PVC) powder was ground with one of two dried alkaline additives, i.e. KOH and NaOH, pellets in air by a planetary ball mill to investigate the dechlorination reaction during the grinding. Grinding of the mixture causes the size reduction of PVC, with causing its mechanochemical reaction with the additive to form partially dechlorinated PVC and chloride (KCl or NaCl), respectively. In both reaction systems, the dechlorination yield increases with an increase in grinding time and amount of additive. The C C bonds in the PVC ingredient are created in its structure with decreasing molecular weight (MW). The MW of the polymer ground with KOH is higher than that ground with NaOH. The dechlorination speed of the polymer ground with KOH is faster than that ground with NaOH in the initial stage of grinding, but this is reversed during prolonged grinding.
Advanced Powder Technology, 2004
Polyvinyl chloride powder was ground with one of the oxide powders, i.e. CaO, Fe 2 O 3 , SiO 2 an... more Polyvinyl chloride powder was ground with one of the oxide powders, i.e. CaO, Fe 2 O 3 , SiO 2 and Al 2 O 3 , in air by a planetary ball mill to investigate the mechanochemical dechlorination of PVC. Grinding causes the size reduction of the each component. The PVC powder sample is degraded by grinding with reduction of molecular weight, forming C C bonds in its structure. The dechlorination occurs in all the ground mixtures, but its phenomenon is classi ed into two types. One is the solid-phase reaction to form chlorides, CaOHCl and FeCl 2 2H 2 O, when CaO and Fe 2 O 3 powders are used. The other is the release of HCl gas by degradation when SiO 2 and Al 2 O 3 powders are used. All the same, the dechlorination yield increases not only with an increase in grinding time, but also with excess of oxide powder.
Advanced Powder Technology, 2000
Journal of the Society of Powder Technology, Japan, 2018
In order to recycle municipal waste incineration ash and cement the raw material, it needs to dec... more In order to recycle municipal waste incineration ash and cement the raw material, it needs to dechlorinate from these ashes. The chlorides in the ash exists as an insoluble salt, it is an obstacle to dechlorinating process. The insoluble salt is formed Friedel's salt that is not easy to eliminate in many case. In order to remove Friedel's salt which is insoluble salt in ash, we distorted the structure by the ball milling and dissolve chlorides in solution, and solid-liquid separation was carried out by filter press. In the process to which sodium bicarbonate was added, obtained results that 78% chlorides elimination, 3,060 ppm chlorides remains from 14,080 ppm chlorides of raw materials in this experiment. This approach is expected to be effective as one of the ash recycling technologies.
Journal of the Society of Materials Science, Japan, 2001
Funtai Kōgakkaishi, 1999
The Proceedings of the Fluids engineering conference, 2016
Journal of the Ceramic Society of Japan, 1992
Journal of the Society of Powder Technology, Japan, 2018
Resources Processing, 2017
Perlite is an amorphous aluminum silicate, mainly composed of SiO 2 and Al 2 O 3. In this study, ... more Perlite is an amorphous aluminum silicate, mainly composed of SiO 2 and Al 2 O 3. In this study, we tried to synthesize LTA type zeolite from a perlite as a starting material. It was found that the mechano-chemical treatment (milling process) for perlite as a raw material resulted in the activation of its surface. As a result, fine LTA-type zeolites were preferentially synthesized for perlite with surface activated by mechano-chemical treatments.
DEStech Transactions on Engineering and Technology Research, 2017
Perlite is an amorphous aluminum silicate, mainly composed of SiO 2 and Al 2 O 3. In this study... more Perlite is an amorphous aluminum silicate, mainly composed of SiO 2 and Al 2 O 3. In this study, we tried to synthesize FAU type zeolite from a perlite as a starting material. It was found that the mechano-chemical treatment (milling process) for perlite as a raw material resulted in the activation of its surface. As a result, nano-sized FAU-type zeolites with higher Si/Al ratio were preferentially synthesized for perlite with surface activated by mechano-chemical treatments.
Journal of the Japan Society of Powder and Powder Metallurgy, 2015
In order to construct the resources circulation society in Japan, we investigated the material re... more In order to construct the resources circulation society in Japan, we investigated the material recycling methods on huge amount of wasted glasses. Because wasted glasses could be chemically activated by ball milling method, and we tried to modify up to the environmental clean-up materials. The self-hardening phenomenon was confirmed from ball milled wasted liquid crystal display panel glasses after alkaline treatment. The characterization of the hardened samples was carried out. These results showed that the self-hardening induced mechano-chemical effects will open a new method for wasted glass utilizations.
Journal of the Society of Powder Technology, Japan, 2016
Key Engineering Materials, 2014
Synthesis of monolithic A-type zeolite (LTA) was attempted by hydrothermal processing from recycl... more Synthesis of monolithic A-type zeolite (LTA) was attempted by hydrothermal processing from recycling flat glass. Crashed flat glass were pretreated and subsequently hydrothermally treated at 95°C for 24 h. As a result, monolithic A-type zeolite without another phase was successfully synthesized by the hydrothermal treatments. The synthetic condition was clarified during the pretreatment and hydrothermal treatments. The development of hydrothermal process for recycle of flat glass was carried out since the monolithic A-type zeolite was obtained under the optimum synthetic conditions (reaction temperatures, reaction time and pretreatment conditions etc).
Journal of the Ceramic Society of Japan, 2014
The samples from A-type zeolite and ground soda-lime glass powders were solidifed by calcinations... more The samples from A-type zeolite and ground soda-lime glass powders were solidifed by calcinations at 600 to 800°C in air atmosphere. These hybrid zeolite/glass samples at 700°C were in part insufficiently densified and hybrid samples were fully densified at 800°C, although the densification was not generated at 600°C. A-zeolites were still stable in glass melt at 800°C for hybrid zeolite/glass samples. These hybrid zeolite/glass samples had the ion exchange ability of 20% against Sr 2+ and the high ability over 80% against Cs + as well as A-zeolite. Microstructures of obtained hybrid zeolite/glass samples were evaluated.
Journal of the Society of Powder Technology, Japan, 2018
Friedel's salt is typical insoluble chloride in municipal waste incinerator ash. In the eco-cemen... more Friedel's salt is typical insoluble chloride in municipal waste incinerator ash. In the eco-cement that made using by that ash for parts of raw materials, when remain chlorides induces the salt damage on its concrete materials, so its problems might disturbs its utilization in market. In order to remove insoluble salt in ash, we used the carbonation and milling techniques to laboratory synthesized Friedel's salt and it recognized good results as, contacting with 0.1 mol/l sodium bicarbonate solution and milling method made it high chloride solubility into water. However in some case, it observed recrystallization of Friedel's salt from solutions and might be chloride ion re-catching onto the amorphous salt surfaces. It means the importance of process control. Moreover, it understands the possibilities of detection of H + movements during carbonation reaction using by at the pulse NMR method in this experiments. In these results, problems about to construct the dechloride processing became clear.
Advanced Powder Technology, 2005
Polyvinyl chloride (PVC) powder was ground with one of two dried alkaline additives, i.e. KOH and... more Polyvinyl chloride (PVC) powder was ground with one of two dried alkaline additives, i.e. KOH and NaOH, pellets in air by a planetary ball mill to investigate the dechlorination reaction during the grinding. Grinding of the mixture causes the size reduction of PVC, with causing its mechanochemical reaction with the additive to form partially dechlorinated PVC and chloride (KCl or NaCl), respectively. In both reaction systems, the dechlorination yield increases with an increase in grinding time and amount of additive. The C C bonds in the PVC ingredient are created in its structure with decreasing molecular weight (MW). The MW of the polymer ground with KOH is higher than that ground with NaOH. The dechlorination speed of the polymer ground with KOH is faster than that ground with NaOH in the initial stage of grinding, but this is reversed during prolonged grinding.
Advanced Powder Technology, 2004
Polyvinyl chloride powder was ground with one of the oxide powders, i.e. CaO, Fe 2 O 3 , SiO 2 an... more Polyvinyl chloride powder was ground with one of the oxide powders, i.e. CaO, Fe 2 O 3 , SiO 2 and Al 2 O 3 , in air by a planetary ball mill to investigate the mechanochemical dechlorination of PVC. Grinding causes the size reduction of the each component. The PVC powder sample is degraded by grinding with reduction of molecular weight, forming C C bonds in its structure. The dechlorination occurs in all the ground mixtures, but its phenomenon is classi ed into two types. One is the solid-phase reaction to form chlorides, CaOHCl and FeCl 2 2H 2 O, when CaO and Fe 2 O 3 powders are used. The other is the release of HCl gas by degradation when SiO 2 and Al 2 O 3 powders are used. All the same, the dechlorination yield increases not only with an increase in grinding time, but also with excess of oxide powder.
Advanced Powder Technology, 2000
Journal of the Society of Powder Technology, Japan, 2018
In order to recycle municipal waste incineration ash and cement the raw material, it needs to dec... more In order to recycle municipal waste incineration ash and cement the raw material, it needs to dechlorinate from these ashes. The chlorides in the ash exists as an insoluble salt, it is an obstacle to dechlorinating process. The insoluble salt is formed Friedel's salt that is not easy to eliminate in many case. In order to remove Friedel's salt which is insoluble salt in ash, we distorted the structure by the ball milling and dissolve chlorides in solution, and solid-liquid separation was carried out by filter press. In the process to which sodium bicarbonate was added, obtained results that 78% chlorides elimination, 3,060 ppm chlorides remains from 14,080 ppm chlorides of raw materials in this experiment. This approach is expected to be effective as one of the ash recycling technologies.
Journal of the Society of Materials Science, Japan, 2001