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首页> 外文期刊>RSC Advances >Calorimetric evaluation indicates that lignin conversion to advanced biofuels is vital to improving energy yields
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Calorimetric evaluation indicates that lignin conversion to advanced biofuels is vital to improving energy yields

机译：量热评估表明，木质素转换为先进的生物燃料对提高能源产量至关重要

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Energy density measurements using bomb calorimetry were applied along with mass yields to calculate energy yields from combinations of individual processes and lignocellulosic feedstocks. Sample preparation and the calorimetric method were fine-tuned for the biofuel process pathway prior to measuring the energy density of liquid fuels and catalysts and solid biomass types (untreated, pelletized, pretreated, and enzymatically hydrolyzed). To statistically establish the method, correlations between biomass composition and energy densities were tested. Strong correlations with lignin, hemicellulose, and ash concentrations were observed and statistically validated (Pearson's coefficient, r = 0.92 and -0.81, respectively). Finally, energy densities were applied along with mass yields on a process pathway including ionic liquid pretreatment (6 L) and saccharification (2 L) of three feedstocks. From switchgrass, eucalyptus, and mixed feedstocks, mass yields of 54.4, 62.0, and 61.7% led to energy yields that were observed to be 59.2, 55.9, and 61.0%, respectively. The disparity in change in mass and energy yields between switchgrass and eucalyptus was identified to have originated from the varied lignin removal during pretreatment. The overall energies recovered from 600 g of switchgrass, eucalyptus, and mixed feedstocks, were 9.8, 10.3, and 10.1 MJ, respectively. Calorimetry can promptly evaluate an integrated multi-process pathway to convert a discrete or mixed feedstock to sugars and other metabolites and eventually to advanced biofuels that can either be hydrocarbons or a mixture thereof. In this particular study, calorimetry and mass yields indicated that lignin removal led to lower energy yield to liquid fuels.
机译：使用炸弹量热法的能量密度测量随着质量产量的施用，以计算各种方法和木质纤维素原料的组合的能量产量。在测量液体燃料和催化剂的能量密度和固体生物量类型（未处理，造粒，预处理和酶促水解）之前，对生物燃料过程途径进行微调的样品制备和量热法。为了在统计上建立该方法，测试生物质组成和能量密度之间的相关性。观察到与木质素，半纤维素和灰分浓度的强相关性，并统计验证（Pearson系数，分别为r = 0.92和-0.81）。最后，在包括离子液体预处理（6L）和三种原料的糖化（2L）的过程途径上施加能量密度。从SwitchGrass，桉树和混合原料中，质量产量为54.4,62.0和61.7％导致能源产量分别观察到59.2,55.9和61.0％。鉴定了SheckGrass和桉树之间的质量和能量产量变化的差异，起源于预处理期间的多种木质素去除。从600克的SwitchGrass，桉树和混合原料中恢复的整体能量分别为9.8,10.3和10.1MJ。热量测定法可以迅速评估集成的多过程路径，以将离散或混合原料转化为糖和其他代谢物，最终达到可以是碳氢化合物或其混合物的先进生物燃料。在这种特殊的研究中，量热法和质量产量表明，木质素去除导致液体燃料的能量产率降低。

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  • 来源
    《RSC Advances》 |2015年第63期|共10页
  • 作者

    Gardner James L.; He Wei; Li Chenlin; Wong Jessica; Sale Kenneth L.; Simmons Blake A.; Singh Seema; Tanjore Deepti;

  • 作者单位

    Univ Calif Berkeley Lawrence Berkeley Natl Lab Adv Biofuels Proc Demonstrat Unit Berkeley CA 94720 USA;

    Univ Calif Berkeley Lawrence Berkeley Natl Lab Adv Biofuels Proc Demonstrat Unit Berkeley CA 94720 USA;

    Univ Calif Berkeley Lawrence Berkeley Natl Lab Adv Biofuels Proc Demonstrat Unit Berkeley CA 94720 USA;

    Univ Calif Berkeley Lawrence Berkeley Natl Lab Adv Biofuels Proc Demonstrat Unit Berkeley CA 94720 USA;

    Joint BioEnergy Inst Deconstruct Div Emeryville CA USA;

    Joint BioEnergy Inst Deconstruct Div Emeryville CA USA;

    Joint BioEnergy Inst Deconstruct Div Emeryville CA USA;

    Univ Calif Berkeley Lawrence Berkeley Natl Lab Adv Biofuels Proc Demonstrat Unit Berkeley CA 94720 USA;

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