An appropriate acid leaching sequence in rice husk ash extraction to enhance the produced green silica quality for sustainable industrial silica gel purpose

Steven, Soen; Restiawaty, Elvi; Pasymi, Pasymi; Bindar, Yazid

doi:10.1016/j.jtice.2021.04.053

Cited by 51 publications

(24 citation statements)

References 39 publications

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“…At first, the escaped particle amount weakens from “0–100” to “50–50” and the value goes up drastically from “50–50” to “100–0,” both for temperatures 25°C and 700°C. This leads to the more escaped particle amount in the furnace containing rice husk ash compared to rice husk because ash is more brittle and easier to break into smaller fragments, 66,67 making them more easily entrained 62,64 . It can be said that the lowest escaped particle amount is found at the composition of “50–50.” This is supported by the calculation results from Equations and where the largest particle settling velocity is nominated to “50–50.”…”

Section: Resultsmentioning

confidence: 99%

“…The greater composition of rice husk ash in the feed mixture augments the particle density but decreases the particle diameter. At first, the escaped particle amount weakens from "0-100" to "50-50" and the value goes up drastically from "50-50" to "100-0," both for temperatures 25 C and 700 C. This leads to the more escaped particle amount in the furnace containing rice husk ash compared to rice husk because ash is more brittle and easier to break into smaller fragments, 66,67 making them more easily entrained. 62,64 It can be said that the lowest escaped particle amount is found at the composition of "50-50."…”

Section: Influences Of Feed Characteristic Properties and Process Tem...mentioning

confidence: 99%

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Digitalized turbulent behaviors of air and rice husk flow in a vertical suspension furnace from computational fluid dynamics simulation

Steven

Restiawaty

Pasymi

et al. 2022

Asia-Pacific J Chem Eng

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The knowledge of fluid–particle flow behavior is necessary. Unfortunately, computational fluid dynamics (CFD) studies are mostly focused on developing numerical methods in detail. Instead, the CFD studies should also subtly shift to become a tool for digitalizing fluid science to guide the practical industrial aspects. Therefore, this simulation study intends to reveal the air and rice husk flow behaviors in a vertical suspension furnace, complete with presenting digital simulation data, aiming to alleviate the escape particle amount. According to this study, the escaped particle amount was suppressed under more sphere particle, smaller particle size, and feed inlet pipe that sunk into the burner. The properties change from rice husk to ash, along with temperature escalation (as in combustion phenomena), enlarging the escaped particle amount, so the cyclone should be installed to handle it. In addition, the results of digital turbulent data from CFD simulation have succeeded in intriguing and revealing the fluid–particle flow behavior in the vertical suspension furnace. The data show a close match to the real phenomena occurring inside this furnace which reflects the standard k–ε model can conclusively predict fluid–particle flow behavior without conflicting Newton's second law of particle motion.

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Section: Resultsmentioning

confidence: 99%

Section: Influences Of Feed Characteristic Properties and Process Tem...mentioning

confidence: 99%

Digitalized turbulent behaviors of air and rice husk flow in a vertical suspension furnace from computational fluid dynamics simulation

Steven

Restiawaty

Pasymi

et al. 2022

Asia-Pacific J Chem Eng

Self Cite

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“…Silica was recovered from corn cob ash (CCA) using the sol–gel method as previously described. [ 17 ] The prickly pear fiber and particle used in this study are depicted in Figure 1. For high purity nanosilica extraction, a modified method described in Sinyoung et al [ 18 ] was followed.…”

Section: Methodsmentioning

confidence: 99%

Mechanical, wear and fatigue behavior of silane‐treated corncob biosilica toughened epoxy resin composite reinforced with prickly pear short fibers

Kumar¹,

Manimaran

Anbukarasi

2022

Polymer Composites

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This research focused on investigating the mechanical, wear, and fatigue behavior of an epoxy composite toughened with corncob biosilica (CCB) and prickly pear fiber (PPF). The primary aim of this research was to improve the load bearing effect of high‐brittle matrix by adding eco‐friendly fiber and particle. The surface treatment on the fiber and particle was done using an amino silane, 3‐Aminopropyltrimethoxysilane (APTMS). The natural fiber composites are prepared by hand layup process and characterized in accordance with ASTM standards. The experimental results indicated that the addition of fiber and particles increased the tensile and flexural strength up to 61% and 50%, respectively. Similarly, it is noted that the biosilica particles improved the bonding and reduced the rate of wear of composites, as well as lowered the stress intensity factor. A lowest wear rate of 0.037 and COF of 0.38 were noted for EFC2 composite designation. The morphological study of the fractured composites revealed improved fiber adhesion to the matrix. This reduced intensity of stress, increased wear resistance and higher fatigue life ensures the composite's application in structural and industrial applications.

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“…Removal of metal ions from rice husk is carried out by acid treatment of the natural raw material [17]. In [16], the effectiveness of acid treatment of rice husk with 2 M hydrochloric acid solution was compared with the method of removal of metallic impurities from the husk by mixing them with citric acid under heating.…”

Section: Introductionmentioning

confidence: 99%

“…In addition to acid treatment, this process chain included heat treatment [16; 18] and dissolution of solid combustion products in an alkaline solution. The final stage of this process is the precipitation of SiO2 upon acidification of the resulting solution [16][17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Характеристика Діоксиду Кремнію, Отриманого Із Рисового Лушпиння

Гриднєва¹,

Скнар

Sknar

et al. 2022

J. of Chem. and Tech.

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Актуальним завданням сучасної хімічної технології є синтез високочистого аморфного діоксиду кремнію з високою питомою поверхнею. Оптимізація технологічних процесів у напрямі зниження енерговитрат та факторів забруднення навколишнього середовища обумовлює активний пошук способів переробки сировини рослинного походження з отриманням діоксиду кремнію із заданими фізико-хімічними характеристиками.Оптимальним, з огляду на енергозбереження, є спосіб переробки рисового лушпиння, що передбачає хімічне очищення рослинної сировини з подальшою її термообробкою. У цій роботі показано, що використання методу подвійної екстракції дозволяє досягти високих характеристик синтезованого з рисової лушпиння діоксиду кремнію. Встановлено, що обробка рисового лушпиння в спиртовому розчині соляної кислоти з подальшою обробкою у водному розчині сірчаної кислоти призводить до очищення сировини від іонів металів та значної кількості лігніну та целюлози. Діоксид кремнію, отриманий в результаті 5 хвилинного випалу при 600 °С підготовленої сировини, є порошок білого кольору з переважним розміром близько 2 мкм і питомою поверхнею 235-250 м2/г. Продукт є рентгеноаморфним та високочистим. Високі характеристики діоксиду кремнію, синтезованого запропонованим способом, відкривають великі перспективи його використання як носії для активних мас каталізаторів, лікарських та косметичних препаратів.

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An appropriate acid leaching sequence in rice husk ash extraction to enhance the produced green silica quality for sustainable industrial silica gel purpose

Cited by 51 publications

References 39 publications

Digitalized turbulent behaviors of air and rice husk flow in a vertical suspension furnace from computational fluid dynamics simulation

Digitalized turbulent behaviors of air and rice husk flow in a vertical suspension furnace from computational fluid dynamics simulation

Mechanical, wear and fatigue behavior of silane‐treated corncob biosilica toughened epoxy resin composite reinforced with prickly pear short fibers

Характеристика Діоксиду Кремнію, Отриманого Із Рисового Лушпиння

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