Thermochemical pretreatments of maize stem for sugar recovery: Comparative evaluation of microwave and conventional heating
Thermochemical pretreatments of maize stem for sugar recovery: Comparative evaluation of microwave and conventional heating
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用于糖回收的玉米茎热化学预处理：微波和常规加热的比较评价
DOI：
10.1016/j.indcrop.2020.113106
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发表时间：
2020-11
影响因子：
5.9
通讯作者：
Duncan J.Macquarrie
中科院分区：
文献类型：
--
作者：
Zongyuan Zhu;Yanbing Liu;Leonardo D.Gómez;Tao Wei;Xinglin Yang;Rachael Simister;Simon J. McQueen-Mason;Duncan J.Macquarrie
微波加热由于其独特的偶极子旋转加热机理，在生物炼制过程中受到广泛关注。在本研究中，微波和常规加热方法来辅助热化学预处理（H2O，H2SO 4或NaOH）的玉米秸秆生物质。初步评价了预处理过程中它们对糖释放和生物质组成的影响。与传统的加热预处理相比，微波热化学预处理在糖的回收方面是高效的，在0.2 M H2SO 4作为预处理介质的情况下，糖的释放量（1.25vs0.30 μmol/mg biomass）高4.3倍，反应时间短8倍（5vs 40 min），并且选择性地产生作为主要成分的葡萄糖（0.75 μmol/mg biomass）。MW热化学预处理在5 min内也有效去除木质素（高达91. 6%），显著高于常规加热预处理（51. 2%）。传统的加热预处理成功地去除了半纤维素，并将结晶纤维素转化为无定形纤维素，这可能是由于其较长的加热时间。快速MW热化学预处理有效地分级半纤维素和去除木质素含量，同时保持结晶纤维素结构。MW和常规加热预处理导致生物质固体残留物的消化率相似。总的来说，MW热化学预处理代表了一种节能的替代策略，因为它消耗的能量比传统的加热预处理少25-34倍，用于有效的生物质分馏和增值化学品生产。
Microwave (MW) heating is attracting great attention in biorefinery processes, because of its special dipole rotation heating mechanism. In the current study, MW and conventional heating methods were employed to assist the thermochemical pretreatments (H2O, H2SO4or NaOH) of maize stem biomass. Their influences on sugar release and biomass compositions during pretreatments were comparably evaluated. Compared to conventional heating pretreatment, MW thermochemical pretreatments are highly efficient in sugar recovery, contributing to 4.3 times higher amount of sugar release (1.25vs0.30 μmol/mg biomass) with reaction time 8 times shorter (5vs40 min) and selectively producing glucose as the major constituent (0.75 μmol/mg biomass) using 0.2 M H2SO4as pretreatment media. MW thermochemical pretreatment also effectively removed lignin (up to 91.6 %) within 5 min, which was significantly higher than conventional heating pretreatment (51.2 %). Conventional heating pretreatment successfully removed hemicellulose and converted the crystalline cellulose into amorphous cellulose, which is probably due to its longer heating time. Rapid MW thermochemical pretreatments efficiently fractionated hemicellulose and removed lignin content while keeping the crystalline cellulose structure. MW and conventional heating pretreatments led to similar digestibility of biomass solid residues. Overall, MW thermochemical pretreatment represents an energy efficient alternative strategy, as it consumed 25–34 folds less energy than conventional heating pretreatment for effective biomass fractionation and value-added chemical production.
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影响因子：
5.5
作者：
Den W;Sharma VK;Lee M;Nadadur G;Varma RS
通讯作者：
Varma RS
影响因子：
7.5
作者：
Conghui Gu;Zhulin Yuan;Shanshan Sun;Lei Guan;Kai Wu
通讯作者：
Conghui Gu;Zhulin Yuan;Shanshan Sun;Lei Guan;Kai Wu
影响因子：
6.3
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
通讯作者：
Polikarpov I
木质纤维素的水热解构机制：热分析和补充研究的新见解。
影响因子：
11.4
作者：
Ibbett R;Gaddipati S;Davies S;Hill S;Tucker G
通讯作者：
Tucker G
DOI：
10.1007/978-3-319-56457-9_3
发表时间：
2017
期刊：
--
影响因子：
--
作者：
Lingping Xiao;Guo-yong Song;R. Sun
通讯作者：
Lingping Xiao;Guo-yong Song;R. Sun