Role of MgxCa1−xCO3 on the physical–chemical properties and cyclic CO2 capture performance of dolomite by two-step calcination

Wang, Ke; Han, Dongtai; Zhao, Peng; Hu, Xiumeng; Yin, Zeguang; Wu, Di

doi:10.1016/j.tca.2015.06.033

Cited by 23 publications

(15 citation statements)

References 41 publications

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“…This shift of the organic polymer decomposition temperatures to lower temperatures is assumed to be because of the impregnation of BL with SS that facilitates the decomposition of organic polymers from carbonaceous precursor. In the SS sample, two main mass losses corresponding to the decomposition of magnesium carbonate around 600°C and calcium carbonate around 800°C were observed . These decompositions shifted to slight higher temperatures in the BL‐SS‐48 material (∼650°C and 850°C, respectively).…”

Section: Resultsmentioning

confidence: 95%

Preparation of hybrid porous carbon using black liquor lignin impregnated with steelmaking slag and its performance in SO₂ removal

Sun

Sage

et al. 2017

Env Prog and Sustain Energy

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A hybrid porous adsorbent was produced by mixing black liquor lignin (BL) with basic oxygen furnace steelmaking slag (SS) followed by carbonization at 8608C for removal of trace sulfur dioxide (SO 2 ) from air. The effects of BL percentage, carbonization temperature, carbonization duration and the binary combined effect of each individual process parameter on the removal of SO 2 have been statistically analyzed. The optimal preparation conditions were 48% 5 BL/ (BL 1 SS), carbonized at 8608C for 50 minutes (labeled BL-SS-48-860-50). The crystallite CaO and MgO phases remained in the hybrid matrix. A carbonization temperature over 8008C facilitated gasification reaction between the carbon matrix and the CO 2 emitted from the decomposition of calcium and magnesium carbonate, which led to the pore formation and enlargement in the carbon matrix. The prepared hybrid adsorbent showed good SO 2 removal performance. The kinetic model demonstrated satisfying results in predicting SO 2 adsorption kinetics with good prediction within a relative large range of SO 2 inlet concentration. The mass transfer coefficient k 5 537 (s 21 ) was obtained by fitting the model to the experimental breakthrough curve.

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Section: Resultsmentioning

confidence: 95%

Preparation of hybrid porous carbon using black liquor lignin impregnated with steelmaking slag and its performance in SO₂ removal

Sun

Sage

et al. 2017

Env Prog and Sustain Energy

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“…Proses dekomposisi dolomit menjadi MgO dan CaO sudah banyak dilakukan baik secara isothermal maupun non-isothermal [7][8][9][10][11][12]. Variabel proses sangat berpengaruh terhadap pembentukan kurva dan puncak fasa MgO dan CaO.…”

Section: Pendahuluanunclassified

“…Pada penelitian kalsinasi dolomit alam menggunakan gas argon pada tekanan atmosfir, dekomposisi menjadi MgO dan CaCO 3 terjadi pada suhu 700 o C kemudian CaCO 3 berdekomposisi menjadi CaO pada suhu700 o C hingga 900 o C [9]. Bentuk kristalin CaO dan MgO dapat dihasilkan dari dolomit melalui dua tahapan kalsinasi dalam gas CO 2 dan N 2 [10]. Penelitian dekomposisi pada dolomit palygorskite-China (DPC), suhu dekomposisi dolomit ditemukan 50°C lebih rendah dari dolomit umum.…”

Section: Pendahuluanunclassified

Pengaruh Suhu Kalsinasi Pada Proses Dekomposisi Dolomit

Royani¹,

Sulistiyono²,

Sufiandi³

2018

jsmi

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Proses dekomposisi dolomit menjadi MgO dan CaO merupakan proses penting mengingat kedua oksida tersebut banyak digunakan dalam berbagai aplikasi. Untuk melihat pengaruh suhu proses kalsinasi terhadap dekomposisi dolomit menjadi MgO dan CaO, maka dilakukan kalsinasi. Proses kalsinasi menggunakan tungku Muffle furnace dengan suhu sebesar 500 o C, 600 o C, 700 o C, 800 dan 900 o C. Sebanyak kurang lebih 100 gram/sampel dolomit dimasukkan dalam tungku dan dipanaskan dengan laju pemanasan 10 o C/menit pada berbagai suhu yang kemudian ditahan masing-masing selama 1 jam, 2 jam, 3 jam, 4 dan 5 jam. Produk kalsinasi kemudian ditimbang dan dikarakterisasi dengan X-Ray Diffraction (XRD) dan Scanning Electron Microscope (SEM). Hasil percobaan menunjukkan kalsinasi dolomit semakin meningkat seiring dengan kenaikkan suhu kalsinasi. Proses kalsinasi dolomit optimum tercapai pada suhu 900 o C selama 4 jam dengan pengurang berat mencapai 46,74 %. Berdasarkan perhitungan stoikiometri pengurangan berat 46,74 % menunjukkan bahwa 97,78 % dolomit terdekomposisi menjadi MgO dan CaO. Pembentukan fasa MgO dan CaO dari dolomit melalui dua tahapan yaitu tahapan pembentukan fasa MgO-CaCO 3 pada suhu 700 o C dan tahapan pembentukan CaO pada suhu 800 o C-900 o C. Kesimpulan yang didapatkan dari proses kalsinasi dolomit ini adalah peningkatan suhu kalsinasi dapat meningkatkan proses dekomposisi dolomit menjadi fasa MgO dan CaO.

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“…The phase development and morphology evolution of the hydromagnesite and hydromagnesite-fumed silica mixture during heat treatment were characterized by SEM, BET nitrogen-gas adsorption method, and XRD. Monolithic forsterite was synthesized after calcination of the hydromagnesite-fumed silica mixture at 1100 • C. Wang et al [104] Role of MgxCa1−xCO3 on the physical-chemical properties and cyclic CO2 capture performance of dolomite by two-step calcination Two-step calcination treated dolomite sorbent was prepared and characterized. An intermediate phase (MgxCa1−xCO3) was observed by TG and XRD results.…”

Section: Study Of Mineral Composition Microstructure Thermal Expansmentioning

confidence: 99%

Review on the elaboration and characterization of ceramics refractories based on magnesite and dolomite

Sadik

Moudden

Bouari

et al. 2016

Journal of Asian Ceramic Societies

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One of the most important elements of furnaces, boilers and other heating units is the structure (lining), usually made of silica-alumina, basic or special refractories. The basic refractories are materials that are increasingly in demand and whose manufacturing involves necessarily the use of MgO and CaO. In this article, the description and characterization of magnesite (MgCO 3) and dolomite (Mg,Ca(CO 3) 2) and their contribution in industrial ceramics-refractories have been reviewed.

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Role of MgxCa1−xCO3 on the physical–chemical properties and cyclic CO2 capture performance of dolomite by two-step calcination

Cited by 23 publications

References 41 publications

Preparation of hybrid porous carbon using black liquor lignin impregnated with steelmaking slag and its performance in SO₂ removal

Preparation of hybrid porous carbon using black liquor lignin impregnated with steelmaking slag and its performance in SO₂ removal

Pengaruh Suhu Kalsinasi Pada Proses Dekomposisi Dolomit

Review on the elaboration and characterization of ceramics refractories based on magnesite and dolomite

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Role of MgxCa1−xCO3 on the physical–chemical properties and cyclic CO2 capture performance of dolomite by two-step calcination

Cited by 23 publications

References 41 publications

Preparation of hybrid porous carbon using black liquor lignin impregnated with steelmaking slag and its performance in SO2 removal

Preparation of hybrid porous carbon using black liquor lignin impregnated with steelmaking slag and its performance in SO2 removal

Pengaruh Suhu Kalsinasi Pada Proses Dekomposisi Dolomit

Review on the elaboration and characterization of ceramics refractories based on magnesite and dolomite

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Product

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Preparation of hybrid porous carbon using black liquor lignin impregnated with steelmaking slag and its performance in SO₂ removal

Preparation of hybrid porous carbon using black liquor lignin impregnated with steelmaking slag and its performance in SO₂ removal