Plastic pollution is ubiquitous in the environment, and nanoplastics (<1 μm) are of growing concern as they pose more health risks than larger particles. However, because of a lack of appropriate model particles, studies examining the risks of pol...
Chemical Engineering and Technology 46(2) 357-362 2023年2月 [査読有り]
Three different salt crystals (K2SO4, KCl, and Na2SO4·10H2O) were produced via batch cooling and continuous crystallization using a bench-scale crystallization device, in order to elucidate the mechanism of inclusion of the mother liquor as a func...
Ippei Tsushima Kouji Maeda Takuji Yamamoto Kazuhiro Ito Koji Arafune Syogo Taguchi Hideo Miki
CHEMICAL ENGINEERING & TECHNOLOGY 45(5) 985-989 2022年5月 [査読有り]
Continuous crystallization via indirect cooling of potassium aluminum sulfate dodecahydrate (KAl(SO4)(2)center dot 12H(2)O) was carried out using a draft tube-type crystallizer with a circulation flow path. The crystallizer was equipped with a new...
JOURNAL OF CHEMICAL ENGINEERING OF JAPAN 55(4) 188-192 2022年4月 [査読有り]
To understand the inclusion of mother liquor in crystals at different sizes, the continuous crystallization of potassium sulfate was investigated. A bench-scale crystallizer of the draft-tube type was employed for both batch cooling and continuous...
JOURNAL OF CHEMICAL THERMODYNAMICS 165 2022年2月 [査読有り]
A new method for determining the liquidus and solidus pressures of mixtures of C18's unsaturated fatty acids at constant temperatures was proposed, and three binary isothermal SLE data under high-pressure were systematically measured in this study...
Yusuke Asakuma Daisuke Koga Kyuya Nakagawa Kouji Maeda Keisuke Fukui
JOURNAL OF APPLIED POLYMER SCIENCE 125(2) 1161-1165 2012年7月
The depolymerization reaction of poly(ethylene terephthalate) (PET) was analyzed on the basis of experimental and numerical data obtained from molecular orbital calculations. Various types of PETs polymerized by different methods and preheated by ...
Y. Asakuma O. Kawanami K. Maeda H. Kuramochi K. Fukui
International Journal of Thermodynamics 14(4) 193-196 2011年12月
The transesterification of triglycerides under various conditions was considered in terms of the activation energy obtained from molecular orbital calculations. The transesterification reaction proceeds via a cyclic transition state, consisting of...
2011 World Congress on Sustainable Technologies, WCST 2011 105-106 2011年12月
Oils upgraded from trap greases were characterized to evaluate their possibility of replacing fossil fuel in terms of impurity content. The heating values of the oils were measured to clarify the input energy required for the upgrading process. Th...
An improved reaction rate of biodiesel fuel formation was observed under microwave irradiation. Such irradiation is effective for not only heating during the reaction but also preheating. The advantages observed in this study suggest that a contin...
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