Production of bio-oil by catalytic pyrolysis of Nannochloropsis sp. over renewed suface CaO catalysts

doi:10.3969/j.issn.0438-1157.2014.11.018

CIESC Journal ›› 2014, Vol. 65 ›› Issue (11): 4340-4346.DOI: 10.3969/j.issn.0438-1157.2014.11.018

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Production of bio-oil by catalytic pyrolysis of Nannochloropsis sp. over renewed suface CaO catalysts

YANG Lin¹, ZHANG Xiuli¹, YANG Ya¹, WANG Xuyun¹, XU Xiufeng², GUO Qingjie¹

1. Key Laboratory of Clean Chemical Processing of Shandong Province, College of Chemical Engineering, Qingdao University of Science & Technology, Qingdao 266042, Shandong, China;
2. Institute of Applied Catalysis, Yantai University, Yantai 264005, Shandong, China

Received:2014-04-10 Revised:2014-06-01 Online:2014-11-05 Published:2014-11-05
Supported by:
supported by the Special Fund of Marine Renewable Energy (GHME2001SW02).

CaO表面更新对微拟球藻催化热解制备生物油的影响

杨林¹, 张秀丽¹, 杨雅¹, 王许云¹, 徐秀峰², 郭庆杰¹

1. 青岛科技大学化工学院, 清洁化工过程山东省高校重点实验室, 山东青岛 266042;
2. 烟台大学应用催化研究所, 山东烟台 264005

通讯作者: 郭庆杰
基金资助:
海洋可再生能源专项资金项目(GHME2001SW02).

Abstract

Abstract: The surface of calcium oxide (CaO) was renewed by using hydration-calcination and thermal calcinations methods, respectively. The structure and property of renewed CaO was characterized by BET, XRD, SEM and CO₂-TPD techniques. Meanwhile, the catalytic pyrolysis of Nannochloropsis sp. was investigated in a fixed-bed reactor. It is shown that two preparation methods for CaO obviously increase the specific surface area, meso-pore numbers, and pore volume. The renewed surface CaO catalysts were of typical face-centered structure and of higher catalyst activity, and could improve bio-oil product quantity. The yield of bio-oil produced on the hydration-calcination CaO was 28.65%, which was of higher calorific value (38.600 kJ·g^-¹), lower kinetic viscosity (8.011 mm²·s^-¹), and lower moisture content (2.49%). The main ingredients of bio-oil from catalytic pyrolysis of Nannochloropsis sp. were C₁₂—C₁₇ saturated normal alkanes, which are more suitable for being upgraded to bio-diesel.

Key words: CaO, hydration, thermal defect, Nannochloropsis sp., catalytic pyrolysis, bio-oil

摘要： 分别以水合化法和热缺陷法对CaO进行表面更新,用N₂物理吸附(BET)、X射线衍射(XRD)、扫描电镜(SEM)和CO₂吸附技术对表面更新后的CaO进行了结构表征,并利用制备的CaO在管式炉内对微拟球藻进行了催化热解研究.结果表明:两种更新方法均能明显提高CaO的比表面积、介孔数目及孔体积.CaO的表面更新处理没有改变基本的晶相结构,仍为立方晶型.两种更新方法均能显著提高CaO的催化活性,且改善了产物油品的性能.相比较而言,水合CaO的催化脱氧性能较高,催化热解得到的生物油产率为28.65%、含氧量为4.67%、热值高达38.600 kJ·g^-1、运动黏度低(8.011 mm²·s^-1)、含水率低(2.49%),且催化热解后的生物油以C₁₂～C₁₇饱和直链烷烃为主,适合进一步精制为生物柴油.

关键词: CaO, 水合化, 热缺陷, 微拟球藻, 催化热解, 生物油

CLC Number:

YANG Lin, ZHANG Xiuli, YANG Ya, WANG Xuyun, XU Xiufeng, GUO Qingjie. Production of bio-oil by catalytic pyrolysis of Nannochloropsis sp. over renewed suface CaO catalysts[J]. CIESC Journal, 2014, 65(11): 4340-4346.

杨林, 张秀丽, 杨雅, 王许云, 徐秀峰, 郭庆杰. CaO表面更新对微拟球藻催化热解制备生物油的影响[J]. 化工学报, 2014, 65(11): 4340-4346.

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Production of bio-oil by catalytic pyrolysis of Nannochloropsis sp. over renewed suface CaO catalysts

CaO表面更新对微拟球藻催化热解制备生物油的影响

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