http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : Hanifi Sarac (검색결과 2 건)
- 무료
- 기관 내 무료
- 유료
-
Kinetic study on the leaching of calcined magnesite in gluconic acid solutions
Bahar Bayrak,Hanifi Sarac,Oral Lac¸in 한국공업화학회 2010 Journal of Industrial and Engineering Chemistry Vol.16 No.3
A kinetic study on the leaching of calcinedmagnesite in aqueous gluconic acid solutionswas investigated in batch reactor employing the parameters of particle size, temperature, stirring speed, solid–liquid ratio and acid concentration. A mathematical model was evaluated for the rate increased with decreasing particle size and increasing temperature and initially, the leaching in terms of acid concentration and then fell with increasing concentration. It was found in the study that stirring speed was not effective on leaching rate. The leaching rate decreases as solid–liquid ratio increases. It was shown that the mathematical model for calcined magnesite particle was:1:9041 lnðð1 XBÞ1=3 þ 1:157Þ þ 0:952 lnðð1 XBÞ2=3 1:156ð1 XBÞ1=3 þ 1:338Þ3:298 arctanð0:577ð1:73ð1 XBÞ1=3 1ÞÞ ¼3bkSCA0rBR tDissolution curves were evaluated in order to test shrinking core models for fluid–solid systems. Consequently, it was determined that the leaching rate is controlled by surface chemical reaction. In addition, the fact that dissolution was controlled by the surface chemical reaction was also supported with the relationship between the rate constant and the particle radius. The activation energy of the process was determined to be 32.88 kJ mol1. 2010 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.
-
Siti Atiqa Al Zahra Mat Darus,Mariyam Jameelah Ghazali,Che Husna Azhari,Rozli Zulkifli,Ahmad Adlie Shamsuri,Hanifi Sarac,Mohd Tamizi Mustafa 한국섬유공학회 2020 Fibers and polymers Vol.21 No.10
Bamboo is an abundant natural resource in Asia and one of the high potential fibers used to reinforce polymercomposites. This article presents a comparative study on the physicochemical and thermal properties of bamboo fiber (BF)from Gigantochloa scortechinii for untreated BF, steam explosion (SE) treatment BF, and steam explosion followed by alkali(SE-alkali) treatment BF. The physicochemical and thermal properties of BF were determined using energy dispersive X-ray(EDX) spectroscopy and thermogravimetric analysis (TGA), while scanning electron microscopy (SEM) was used toexamine the surfaces morphologies. A Fourier transform infrared (FTIR) spectroscopy was utilized to detect the presence offunctional groups. TGA results showed that SE BF was significantly more thermally stable than the untreated BF and SEalkalitreatment BF. Major changes in chemical composition and surface morphology of the bamboo fibers indicated thathemicellulose and lignin were removed by SE-alkali treatment. In conclusion, the BF surface is physically and chemicallymodified by the SE-alkali treatment.
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
