Effect of calcination temperature and heating rate on the optical properties and reactivity of rice husk ash

2006 ◽  
Vol 41 (23) ◽  
pp. 7926-7933 ◽  
Author(s):  
Sathy Chandrasekhar ◽  
P. N. Pramada ◽  
Jisha Majeed
Keyword(s):  
Optical Properties ◽  
Heating Rate ◽  
Calcination Temperature ◽  
Rice Husk ◽  
Rice Husk Ash

scholarly journals Effect of MnO2 doped on physical, structure and optical properties of zinc silicate glasses from waste rice husk ash

2017 ◽  
Vol 7 ◽  
pp. 955-961 ◽  
Author(s):  
Ali Jabbar Abed Al-Nidawi ◽  
Khamirul Amin Matori ◽  
Azmi Zakaria ◽  
Mohd Hafiz Mohd Zaid
Keyword(s):  
Optical Properties ◽  
Rice Husk ◽  
Rice Husk Ash ◽  
Physical Structure ◽  
Silicate Glasses ◽  
Zinc Silicate

scholarly journals PREPARATION OF CaO-BASED PELLET USING RICE HUSK ASH VIA GRANULATION METHOD FOR POTENTIAL CO2 CAPTURE

2021 ◽  
Vol 22 (1) ◽  
pp. 234-244
Author(s):  
Farah Diana Mohd Daud ◽  
Muhammad Mirza Mohamad Azir ◽  
Mudrikah Sofia Mahmud ◽  
Norshahida Sarifuddin ◽  
Hafizah Hanim Mohd Zaki
Keyword(s):  
Calcination Temperature ◽  
Rice Husk ◽  
Rice Husk Ash ◽  
Raw Materials ◽  
Amorphous Structure ◽  
Absorption Capacity ◽  
Co2 Absorption ◽  
Support Materials ◽  
Co2 Capturing ◽  
The Stability

CO2 capturing has become very significant option to reduce the emission of CO2 in the atmosphere and hence, minimizing environmental issues.Among solid CO2 sorbent, calcium oxide (CaO) is an attractive regenerable sorbent for CO2 capturing because of their reactivity and high CO2 absorption capacity. CaO alone suffers from rapid decay of CO2 adsorption during multiple carbonation/calcination reaction cycles. The stability of CaO sorbents during cyclic runs can be achieved via the incorporation of additive support materials. The silica (SiO2) from natural sources such as rice husk is the best candidate to be used as an additive in the sorbents. However, the CaO-based sorbent in finely generated  powders are prone to severe attrition problems. Therefore, this research focuses on preparation of CaO-based pellets by using rice husk ash (RHA) via granulation method. The result of the raw materials confirmed that Ca(OH)2 have crystalline structure with finely distributed grains and RHA exhibit amorphous structure with randomly oriented size grains. Based on the XRD, it is confirmed that the insertion of RHA does not alter the phase structure of the pellets. Each ratio yield different intensity value and has formation of new peaks after sintering. Meanwhile, the microstructures of the pellets show that the pores reduced as the calcination temperature increased while the incorporation of RHA caused the pores size increased with randomly oriented shape. These findings indicate that the optimum value for the pellets is with the Ca(OH)2:RHA ratio of 80:20 and calcination temperature of 750 °C. ABSTRAK: Penangkapan CO2 telah menjadi pilihan yang sangat penting untuk mengurangkan pelepasan CO2 di atmosfer serta kesan alam sekitar. Antara penjerap CO2 pepejal, kalsium oksida (CaO) adalah penyerapan yang menarik untuk CO2 yang ditangkap kerana kereaktifan dan kapasiti penyerapan CO2 yang tinggi. CaO sahaja menderita daripada pelepasan cepat penjerapan CO2 semasa kitaran tindakbalas karbonasi / kalsinasi. Kestabilan CaO penjerap semasa berlaku kitaran boleh dicapai melalui penggabungan bahan sokongan tambahan. Silika (SiO2) dari sumber semula jadi seperti sekam padi (RHA) adalah calon terbaik untuk digunakan sebagai aditif dalam penjerap. Walau bagaimanapun, penjerap berasaskan CaO dalam bentuk serbuk halus yang dihasilkan adalah terdedah kepada masalah pergeseran yang teruk. Oleh itu, kajian ini memberi tumpuan kepada penyediaan pelet berasaskan CaO dengan menggunakan abu sekam beras melalui kaedah granulasi. Hasil bahan mentah mengesahkan bahawa Ca(OH)2 mempunyai struktur kristalografi dengan bijirin halus dan RHA yang mempamerkan struktur bukan kristal dengan butiran saiz berorientasikan secara rawak. Berdasarkan XRD, ia disahkan bahawa penyisipan RHA tidak mengubah struktur kristalografi pelet. Setiap nisbah menghasilkan nilai intensiti yang berbeza dan mempunyai pembentukan puncak baru selepas pensinteran. Sementara itu, mikrostruktur pelet menunjukkan bahawa pori-pori berkurangan apabila suhu kalsinasi meningkat sementara pembentukan RHA menyebabkan saiz pori meningkat dengan bentuk berorientasikan rawak. Penemuan ini menunjukkan bahawa nilai optimum bagi pelet adalah dengan nisbah Ca(OH)2:RHA 80:20 dan suhu kalsinasi 750 °C.

scholarly journals Crystal Structure and Thermal Behaviour of Calcium Monosilicate Derived from Calcined Chicken Eggshell and Rice Husk Ash

2021 ◽  
Vol 2129 (1) ◽  
pp. 012040
Author(s):  
Nur Hazlinda Jakfar ◽  
Khor Shing Fhan ◽  
Banjuraizah Johar ◽  
Nur Maizatul Shima Adzali ◽  
Siti Nur Hazwani Mohd. Yunus ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Silicon Dioxide ◽  
Heating Rate ◽  
Calcium Oxide ◽  
Rice Husk ◽  
Rice Husk Ash ◽  
Sintering Temperature ◽  
Rice Husks ◽  
Mixed Powder ◽  
Chicken Eggshell

Abstract This study focuses on the synthesis of synthetic calcium monosilicate ceramic from chicken eggshells and rice husks waste through the mechanochemical route that relatively straightforward without adding any binders. Synthetic calcium monosilicate was mixed using a 1:1 ratio of calcined eggshell and rice husk ash, which both materials known as rich in calcium oxide and silica sources, respectively. The mixed powder was pressed using uniaxial pressing before fired at 1100°C, 1150°C, 1200°C, 1250°C, and 1300°C for 120 minutes with a heating rate of 5°C/min. The XRD spectrum from 1100°C to 1200°C mainly consists of pseudowollastonite (ICSD: 98-005-2576), wollastonite and silicon dioxide phases. However, as the sintering temperature increases, the wollastonite phases was completely transformed into pseudowollastonite, leaving some unreacted silica.

scholarly journals A Study on Optical Properties of Zinc Silicate Glass-Ceramics as a Host for Green Phosphor

2020 ◽  
Vol 10 (14) ◽  
pp. 4938
Author(s):  
Siti Aisyah Abdul Wahab ◽  
Khamirul Amin Matori ◽  
Mohd Hafiz Mohd Zaid ◽  
Mohd Mustafa Awang Kechik ◽  
Sidek Hj Ab Aziz ◽  
...  
Keyword(s):  
Optical Properties ◽  
Silicate Glass ◽  
Rice Husk ◽  
Rice Husk Ash ◽  
Glass Ceramics ◽  
Linear Shrinkage ◽  
Zinc Silicate ◽  
Crystal Formation ◽  
Absorption Bands ◽  
White Rice

For the very first time, a study on the crystallization growth of zinc silicate glass and glass-ceramics was done, in which white rice husk ash (WRHA) was used as the silicon source. In this study, zinc silicate glass was fabricated by using melt–quenching methods based on the composition (ZnO)0.55(WRHA)0.45, where zinc oxide (ZnO) and white rice husk ash were used as the raw materials. The control crystallization technique was used in which the sample was sintered at 700–950 °C; then, the physical, structural, and optical properties of the glass and glass-ceramics were investigated by using a densitometer, linear shrinkage, X-ray diffraction (XRD), Fourier transform infrared radiation (FTIR), field-emission scanning electron microscopy (FESEM), and photoluminescence spectroscopy (PL). The density and linear shrinkage increased as the crystallinity increased and the XRD results showed the progression of the crystal formation, in which the sample was still in an amorphous state at 27 °C and 700 °C; the crystalline phase started at 750 °C. Based on the FTIR spectra, all samples showed sharpened absorption bands as the sintering temperature was increased, and the FESEM image showed the progression of crystal growth, indicating the formation of zinc silicate glass-ceramics. Lastly, the PL spectra emitted three emission peaks, at 529, 570, and 682 nm for the green, yellow, and red emission, respectively.

Silica derived from variety of sources and its functionalized forms as an antiblock additive in polypropylene

2021 ◽  
pp. 089270572110571
Author(s):  
Omair Malik ◽  
Tina Joshi ◽  
Vishal Goel ◽  
Gurpreet Singh Kapur ◽  
Leena Nebhani
Keyword(s):  
Optical Properties ◽  
Rice Husk ◽  
Morphological Analysis ◽  
Rice Husk Ash ◽  
Melt Flow Index ◽  
Polymeric Films ◽  
Flow Index ◽  
Yellowness Index ◽  
Transparent Films ◽  
Ash Disposal

Silica derived from variety of sources and its functionalized form has been studied as an antiblock additive in polypropylene (PP). Commonly inorganic antiblock additives are added to PP films to reduce the blocking and facilitate separation of polymeric films. However, such types of additives can cause a reduction of clarity in transparent films. In the present work, comparative analysis of silica obtained from various sources specifically from rice husk ash and its further functionalization/modifications using n-octyltriethoxysilane has been performed. Since silica synthesized via rice husk ash was obtained from waste (rice husk ash), this further solves the problem of ash disposal. The functionalized silica has been characterized using Fourier transform infrared (FTIR) spectroscopy, and thermogravimetric analysis (TGA). The morphological analysis and particle shape and size has been characterized by scanning electron microscopy (SEM). The melt flow index (MFI), yellowness index and other mechanical characterizations including tensile and impact strength was performed for 30–40 µm thick tubular quenched polypropylene (TQPP) films. These films were evaluated to have high transmittance (above 93%), high clarity (above 98%) and very low haze (less than 2%) indicating the high transparency and improved optical properties. The blocking force and optical properties are quite similar for TQPP film containing silica synthesized from rice husk ash and commercial grade silica and hence, proving silica synthesized from rice husk ash to be an effective substitute for commercial silica in TQPP films.

Investigations of Physical and Optical Properties on Glass from Rice Husk Ash Doped with MnO2

2013 ◽  
Vol 770 ◽  
pp. 14-17 ◽  
Author(s):  
Smit Insiripong ◽  
Nattapon Srisittipokakun ◽  
Keerati Kirdsiri ◽  
Jakrapong Kaewkhao
Keyword(s):  
Refractive Index ◽  
Optical Properties ◽  
Rice Husk ◽  
Glass Sample ◽  
Rice Husk Ash ◽  
Research Work ◽  
Glass Production ◽  
Silica Source ◽  
Doped Glasses ◽  
Mn Doped

In this research work, physical and optical properties on glass prepared from rice husk ash (RHA) doped with MnO2 glasses were in investigated. RHA was sintered at 1,000 °C and use as a silica source for glass production. The glass sample were prepared and doped with different concentrations of MnO2 ranging from 0.0 to 1.0 mol%. The results are shown that the colors of glass samples were altered from colorless to brown with increasing of MnO2 concentration. Refractive index and density were increased with increasing MnO2 concentration. The absorption peaks at 440 nm were obtained for all Mn doped glasses.

scholarly journals Effect of ZnO on the phase transformation and optical properties of silicate glass frits using rice husk ash as a SiO2 source

2020 ◽  
Vol 9 (5) ◽  
pp. 11013-11021
Author(s):  
Siti Aisyah Abdul Wahab ◽  
Khamirul Amin Matori ◽  
Sidek Hj Ab Aziz ◽  
Mohd Hafiz Mohd Zaid ◽  
Mohd Mustafa Awang Kechik ◽  
...  
Keyword(s):  
Phase Transformation ◽  
Optical Properties ◽  
Silicate Glass ◽  
Rice Husk ◽  
Rice Husk Ash

Effect of Lead Oxide on Glass Properties Produced from Rice Husk Fly Ash

2012 ◽  
Vol 506 ◽  
pp. 563-566 ◽  
Author(s):  
Y. Ruangtaweep ◽  
Jakrapong Kaewkhao ◽  
N. Srisittipokakun ◽  
Pichet Limsuwan
Keyword(s):  
Refractive Index ◽  
Optical Properties ◽  
Fly Ash ◽  
Rice Husk ◽  
Lead Oxide ◽  
Rice Husk Ash ◽  
Glass Production ◽  
Raw Material ◽  
Melt Quenching ◽  
Glass Properties

In this work, the glass samples were prepared from the rice husk ash (RHA) with different PbO concentrations by melt-quenching technique. The effect of PbO on the physical and optical properties of the glasses from RHA have been studied. The results showed that the refractive index and density increased with increasing PbO concentration. The absorption spectra of all samples showed the cut-off wavelength approximately at 360 nm. For comparison, similar properties of SiO2 glass doped with different PbO concentrations were also studied. It was found that the RHA is possible to be used as a raw material in the glass production.

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