دانلود رایگان مقاله لاتین ساختارشکنی چوب ذرت از سایت الزویر
عنوان فارسی مقاله:
ساختارشکنی چوب ذرت توسط بخار قبل انفجار: ارتباط بین تبدیل قند و سازه مقاوم
عنوان انگلیسی مقاله:
Deconstruction of corncob by steam explosion pretreatment: Correlations between sugar conversion and recalcitrant structures
سال انتشار : 2016
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مقدمه انگلیسی مقاله:
1. Introduction
Cost-effective pretreatment technologies are essential to successful operation of future biorefineries which convert biomass into a spectrum of fuel molecules and industrial chemicals (Haghighi Mood et al., 2013; Sheldon, 2014). To this end, different pretreatment strategies are being developed to improve sugar yield from lignocellulosic biomass samples by increasing accessibility of enzymes to cellulose fibers (Meng & Ragauskas, 2014), decreasing lignin content (Singh, Shukla, Tiwari, & Srivastava, 2014; Zeng, Zhao, Yang, & Ding, 2014) or transforming native cellulose crystalline structure into less recalcitrant forms (Cheng et al., 2011; da Costa Sousa et al., 2016). However, suitable pretreatment technologies have not been established due in part to complex interactions between plant cell walls and biomass pretreatment as well as coupling between the biomass recalcitrant factors (Cheng, Zhang, Simmons, & Singh, 2015). This requires further study of pretreatment processes to identify efficient ways to deconstruct biomass. Steam explosion is being recognized as one of the leading pretreatment technologies for agricultural residues with lower environmental impact (Gaur et al., 2015). During steam explosion, the biomass is saturated with steam at high pressure, followed bya sudden decompression. Major structural changes include hydrolysis of hemicellulose by organic acids produced during the process (autohydrolysis) as well as relocation and degradation of lignin (Singh, Suhag, & Dhaka, 2015). Although steam explosion pretreatment has been the technology of choice for a number of herbaceous biomass feedstock, exogenous acid catalysts such as H2SO4, H3PO4, oxalic, maleic and fumaric acids, and other acid-generating compounds such as SO2 and CO2 need to be combined with steam pretreatment for woody biomass samples (Lopez-Linares et al., 2015; Olsen, Arantes, & Saddler, 2015). Addition of acids decreases time and temperature of reaction, leading to a more complete removal of hemicellulose (Behera, Arora, Nandhagopal, & Kumar, 2014). Extensive studies on steam explosion pretreatment have offered important insights into this process; however, the relative importance of the factors affecting the enzymatic digestibility is still not fully understood (DeMartini et al., 2015; Gaur et al., 2015; Liu, Qin, Li, & Yuan, 2015). While no clear correlation between biomass crystallinity and sugar conversion has been found in many studies that involved steam explosion pretreatment (Huang et al., 2015; Kapoor et al., 2015; Liu et al., 2015), the overall degree of order in cellulose, measured by FTIR, has been shown to play a negative role in enzymatic hydrolysis of rice straw, cotton stalk and mustard stalk (Gaur et al., 2015). Specific surface area has been correlated positively with glucose conversion at 72 h enzymatic hydrolysis of several agricultural residues pretreated by steam explosion, dilute acid, and alkali (Gaur et al., 2015; Kapoor et al., 2015). Yet, in another
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کلمات کلیدی:
Application of Steam Explosion as Pretreatment on Lignocellulosic ... pubs.acs.org/doi/full/10.1021/ie503151g by N Jacquet - 2015 - Cited by 27 - Related articles Feb 4, 2015 - The main asset of steam-explosion pretreatment is its low energy consumption. ... of pretreatment based on the cumulative relation between temperature and ... the glucose yields obtained by the enzymatic hydrolysis of a pretreated .... The decrease in the cellulosic ratio of the samples is correlated to the ... Deconstruction of corncob by steam explosion pretreatment ... isi-dl.com/item/126046 Deconstruction of corncob by steam explosion pretreatment: Correlations between sugar conversion and recalcitrant structures. sciencedirect.com ... Steam explosion pretreatment of softwood: the effect of the explosive ... https://biotechnologyforbiofuels.biomedcentral.com/articles/10.../s13068-016-0567-1 by T Pielhop - 2016 - Cited by 9 - Related articles Jul 22, 2016 - Steam explosion Pretreatment Lignocellulosic biomass Softwood Enzymatic digestibility Biorefinery .... An additional steam reservoir between boiler and reactor gives ..... Cellulose conversion to glucose is expressed as % of pretreated .... were observed, suggesting that these effects are strongly correlated. How chip size impacts steam pretreatment effectiveness for biological ... https://biotechnologyforbiofuels.biomedcentral.com/articles/10.../s13068-015-0373-1 by JD DeMartini - 2015 - Cited by 3 - Related articles Dec 9, 2015 - To better understand whether the effectiveness of steam explosion ... causes of variations in sugar yields within and between pretreated wood. ...... area to volume ratio, could be positively correlated with better digestibility in ... [PDF]Using steam explosion pretreatment method for bioethanol production ... agronomy.emu.ee/vol122/2014_2_13_b5.pdf by M Tutt - 2014 - Cited by 12 - Related articles different temperatures on sugar conversion rates and bioethanol production efficiencies ... Among those, steam explosion and dilute acid pretreatment are the .... The correlation of hemicellulose content in meadow hay samples, from steam. Mathematics—Advances in Research and Application: 2012 Edition https://books.google.com/books?isbn=1464990719 2012 - Mathematics Conversion. Of. Lignocellulosic. Materials. For. Sugar. Production: A. Review ... leading technologies such as dilute acid, alkaline, and steam explosion pretreatment, ... and an Arrhenius-type correlation between rate constant and temperature.
