Evaluating the composition and processing potential of novel sources of Brazilian biomass for sustainable biorenewables production.
Evaluating the composition and processing potential of novel sources of Brazilian biomass for sustainable biorenewables production.
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DOI：
10.1186/1754-6834-7-10
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发表时间：
2014-01-18
影响因子：
6.3
通讯作者：
Polikarpov I
中科院分区：
文献类型：
--
作者：
Lima MA;Gomez LD;Steele-King CG;Simister R;Bernardinelli OD;Carvalho MA;Rezende CA;Labate CA;Deazevedo ER;McQueen-Mason SJ;Polikarpov I
面对对温室气体排放和燃料安全日益增长的担忧，全球能源需求的增加刺激了寻找有前途的可再生碳水化合物来源，用于生产生物燃料和其他生物可再生能源。特别是，人们的兴趣集中在非食品木质纤维素生物质作为生物炼制的丰富和可持续原料的潜在来源。在这里，我们研究了三种巴西草（Panicum maximum， Pennisetum purpureum和Brachiaria brizantha）以及两种商业桉树无性系（E. grandis和E. grandis x urophylla）的树皮残留物用于生物燃料生产的潜力，并将其与甘蔗甘蔗渣进行了比较。研究了热水、酸性、碱性和亚硫酸盐预处理（温度升高）对不同生物质类型的化学组成、形态和糖化率的影响。比较了5种生物量的平均产量（每公顷）、可利用性和一般组成。成分分析表明，在酸和碱预处理后，随着温度的升高，所有草类（包括甘蔗渣）的半纤维素和木质素的去除率都很高，而用热水或亚硫酸盐预处理的生物质与对照相比变化不大。对于所有生物质，在130°C氢氧化钠处理下，纤维素的富集程度更高。在180°C时，纤维素含量下降，这与高无定形纤维素去除和5-羟甲基糠醛生产有关。形态学分析显示了不同预处理对生物量表面的影响，表明1%氢氧化钠在130°C下处理30分钟后，草表面微纤化纤维素的产量很高。这可能解释了这些预处理产生的较高水解率，因为这些纤维素纳米颗粒可以很容易地被纤维素酶接触和切割。我们的研究结果表明，三种巴西禾草具有高产的潜力，可以作为乙醇生产和其他生物材料的宝贵碳水化合物来源。130℃氢氧化钠是提高糖化率最有效的预处理。它还有效地在草表面生产微纤化纤维素，从而揭示了它们作为用于生物纳米复合材料生产的天然填料的潜力。
The search for promising and renewable sources of carbohydrates for the production of biofuels and other biorenewables has been stimulated by an increase in global energy demand in the face of growing concern over greenhouse gas emissions and fuel security. In particular, interest has focused on non-food lignocellulosic biomass as a potential source of abundant and sustainable feedstock for biorefineries. Here we investigate the potential of three Brazilian grasses (Panicum maximum, Pennisetum purpureum and Brachiaria brizantha), as well as bark residues from the harvesting of two commercial Eucalyptus clones (E. grandis and E. grandis x urophylla) for biofuel production, and compare these to sugarcane bagasse. The effects of hot water, acid, alkaline and sulfite pretreatments (at increasing temperatures) on the chemical composition, morphology and saccharification yields of these different biomass types were evaluated. The average yield (per hectare), availability and general composition of all five biomasses were compared. Compositional analyses indicate a high level of hemicellulose and lignin removal in all grass varieties (including sugarcane bagasse) after acid and alkaline pretreatment with increasing temperatures, whilst the biomasses pretreated with hot water or sulfite showed little variation from the control. For all biomasses, higher cellulose enrichment resulted from treatment with sodium hydroxide at 130°C. At 180°C, a decrease in cellulose content was observed, which is associated with high amorphous cellulose removal and 5-hydroxymethyl-furaldehyde production. Morphological analysis showed the effects of different pretreatments on the biomass surface, revealing a high production of microfibrillated cellulose on grass surfaces, after treatment with 1% sodium hydroxide at 130°C for 30 minutes. This may explain the higher hydrolysis yields resulting from these pretreatments, since these cellulosic nanoparticles can be easily accessed and cleaved by cellulases. Our results show the potential of three Brazilian grasses with high productivity yields as valuable sources of carbohydrates for ethanol production and other biomaterials. Sodium hydroxide at 130°C was found to be the most effective pretreatment for enhanced saccharification yields. It was also efficient in the production of microfibrillated cellulose on grass surfaces, thereby revealing their potential as a source of natural fillers used for bionanocomposites production.
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DOI：
10.1073/pnas.0912073107
发表时间：
2010-03-09
影响因子：
11.1
作者：
Binder, Joseph B.;Raines, Ronald T.
通讯作者：
Raines, Ronald T.
影响因子：
6.9
作者：
La Rovere, Emilio Lebre;Pereira, Andre Santos;Simoes, Andre Felipe
通讯作者：
Simoes, Andre Felipe
影响因子：
6.3
作者：
Goldemberg, Jose
通讯作者：
Goldemberg, Jose
DOI：
10.1002/ep.10209
发表时间：
2007-10-01
期刊：
ENVIRONMENTAL PROGRESS
影响因子：
--
作者：
Granda, Cesar B.;Zhu, Li;Holtzapple, Mark T.
通讯作者：
Holtzapple, Mark T.
影响因子：
6.3
作者：
Lima MA;Lavorente GB;da Silva HK;Bragatto J;Rezende CA;Bernardinelli OD;Deazevedo ER;Gomez LD;McQueen-Mason SJ;Labate CA;Polikarpov I
通讯作者：
Polikarpov I