...
首页> 外文期刊>Energy & fuels >Pyrolysis of a Naturally Dried Botryococcus braunii Residue
【24h】

Pyrolysis of a Naturally Dried Botryococcus braunii Residue

机译:天然干燥的布鲁氏葡萄球菌残渣的热解

获取原文
获取原文并翻译 | 示例
           

摘要

The extant chlorophyte microalga Botryococcus braunii is a potential source of biofuel. In any future biofuel plant, it may be dried and stockpiled after harvesting and then pyrolyzed to generate oil. To investigate the formation of bio-oil from B. brauniit its naturally occurring residue known as coorongite was pyrolyzed non-isothermally and isothermally under about 1 atm of pure nitrogen carrier gas. The apparent pyrolysis activation energy of coorongite (25 kJ/mol) is much lower than those of most kerogens, which are on the order of 130-250 kj/mol. However, it approaches that reported for a Moroccan marine oil shale, implying similarities in their responses to pyrolysis. Non-isothermal pyrolysis by thermogravimetry coupled with infrared spectroscopy (TG-IR) revealed coorongite to contain a significant amount of alkanes. Molecular analysis of the isothermal pyrorysates by gas chromatography-mass spectrometry (GC-MS) identified a homologous series of normal alkanes and alkenes (C_9-C_(21)), normal ketones (C_8-C_(12)), alkylaromatic compounds, carboiylic acids, and phenols. Structural group quantitation by nuclear magnetic resonance (NMR) and infrared (IR) spectroscopy showed that the pyrolysate is the result of several processes, with thermal decarboxylation forming alkanes, dehydrogenation ± cydization forming alkenes and aromatic hydrocarbons, and some compounds being products of simple physical volatilization. Complementary analysis of the pyrolysis residues using solid-state ~(13)C NMR and IR revealed that their sp'C-H carbon atoms would also be volatilized if treated by hydrocracking. These results suggest that stockpiled B. braunii may benefit from pyrolytic removal of carboxyl groups prior to further upgrading by hydrocracking and hydrogenation.
机译:现有的绿藻类微藻Botryococcus braunii是潜在的生物燃料来源。在任何未来的生物燃料工厂中,收割后都可以进行干燥和储存,然后进行热解以产生石油。为了研究由布鲁氏杆菌形成的生物油,其天然存在的残渣称为Coorongite是在约1个大气压的纯氮气载气下非等温和等温热解的。 Coorongite的表观热解活化能(25 kJ / mol)远低于大多数干酪根的热解活化能,约为130-250 kj / mol。然而,该方法报道了摩洛哥海相油页岩的存在,这暗示了它们对热解反应的相似性。通过热重分析与红外光谱法(TG-IR)进行的非等温热解显示,堇青石含有大量烷烃。用气相色谱-质谱法(GC-MS)对等温焦磷酸酯进行分子分析,确定了一系列的正构烷烃和烯烃(C_9-C_(21)),正构酮(C_8-C_(12)),烷基芳族化合物,碳氢化合物酸和酚。通过核磁共振(NMR)和红外(IR)光谱对结构基团进行定量分析表明,热解产物是多种过程的结果,其中热脱羧形成烷烃,脱氢±环化形成烯烃和芳烃,有些化合物是简单物理的产物挥发。使用固态〜(13)C NMR和IR进行的热解残基的补充分析显示,如果通过加氢裂化处理,其sp'C-H碳原子也将挥发。这些结果表明,在通过加氢裂化和氢化进一步提纯之前,储存的布鲁氏布鲁氏菌可能受益于热解除去羧基。

著录项

  • 来源
    《Energy & fuels》 |2012年第mayajuna期|p.3874-3881|共8页
  • 作者单位

    School of Science and Health, University of Western Sydney, Locked Bag 1797, Penrith, New South Wales 2751, Australia;

    School of Science and Health, University of Western Sydney, Locked Bag 1797, Penrith, New South Wales 2751, Australia;

    School of Science and Health, University of Western Sydney, Locked Bag 1797, Penrith, New South Wales 2751, Australia;

    School of Science and Health, University of Western Sydney, Locked Bag 1797, Penrith, New South Wales 2751, Australia;

    School of Science and Health, University of Western Sydney, Locked Bag 1797, Penrith, New South Wales 2751, Australia ,Commonwealth Scientific and Industrial Research Organisation (CSIRO) Earth Sciences and Resource Engineering, Riverside Corporate Park, 11 Julius Avenue, North Ryde, New South Wales 2113, Australia;

    Centre for Tectonics, Resources and Exploration (TRaX), School of Earth and Environmental Sciences, Mawson Laboratories, DP 313, University of Adelaide, Adelaide, South Australia 5005, Australia;

    Centre for Tectonics, Resources and Exploration (TRaX), School of Earth and Environmental Sciences, Mawson Laboratories, DP 313, University of Adelaide, Adelaide, South Australia 5005, Australia;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号