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鈣基脫硫劑孔隙分布特性的模擬研究
摘要: 鈣基脫硫劑煅燒的多孔產(chǎn)物CaO孔隙的分布特性,影響著硫化反應(yīng)速率、脫硫效果和鈣利用率,對(duì)其分析將有助于分析脫硫過程中脫硫劑的孔堵塞、孔口閉塞等現(xiàn)象及脫硫效果.假設(shè)孔長度分布是連續(xù)的,且分布函數(shù)滿足對(duì)數(shù)正態(tài)分布,模擬分析了CaO內(nèi)孔的比表面積、孔容積及孔徑的分布,并通過實(shí)驗(yàn)驗(yàn)證,模擬結(jié)果與實(shí)驗(yàn)值吻合較好,同時(shí),根據(jù)此模型對(duì)CaO的硫化活性及孔隙的最佳分布進(jìn)行了討論.結(jié)果表明:當(dāng)孔隙分布達(dá)到最佳時(shí),CaO具有較高的有效比表面積和孔隙率. Abstract: The characteristics of pore distributions of the porous productCaO from calcinated calcium-based sorbents have a great effect on the sulfation reactivity, sulfation extent and calcium utilization. The reasonable description of them is helpful to analyze the pore filling, pore mouth plugging and sulfation results during desulfation. Based on the assumption that the pore length distribution of porous CaO meets normal logarithm function, distributions of the specific surface area, pore volume, pore sizes are described in this paper. Compared with the experimental data, results predicted by the model are in good agreement with the experimental data. The sulfation performance and optimum pore distributions of CaO are investigated with this model. Results show that CaO with the optimum pore distribution has the high available specific surface area and pore volume used for the sulfation reaction. 作 者: 繆明烽 沈湘林 作者單位: 東南大學(xué)潔凈煤發(fā)電與燃燒技術(shù)教育部重點(diǎn)實(shí)驗(yàn)室, 南京 210096 期 刊: 東南大學(xué)學(xué)報(bào)(自然科學(xué)版) ISTICEIPKU Journal: JOURNAL OF SOUTHEAST UNIVERSITY(NATURAL SCIENCE EDITION) 年,卷(期): 2001, 31(2) 分類號(hào): X511 關(guān)鍵詞: 鈣基脫硫劑 分布特性 數(shù)學(xué)模型【鈣基脫硫劑孔隙分布特性的模擬研究】相關(guān)文章:
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