Journal
BIORESOURCE TECHNOLOGY
Volume 298, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2019.122446
Keywords
Lignocellulose; Ammonia; Pretreatment; Technoeconomics; Biorefinery
Funding
- Commonwealth Project of Science and Technology Agency of Zhejiang Province of China [2017C32068]
- National Natural Science Foundation of China [31500491, 51706207]
- Rutgers University
- China Scholarship Council
- Oak Ridge Associated Universities
- US National Science Foundation [1604421, 1846797]
- Div Of Chem, Bioeng, Env, & Transp Sys
- Directorate For Engineering [1846797] Funding Source: National Science Foundation
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Ammonia-based pretreatments have been extensively studied in the last decade as one of the leading pre-treatment technologies for lignocellulose biorefining. Here, we discuss the key features and compare performances of several leading ammonia-based pretreatments (e.g., soaking in aqueous ammonia or SAA, ammonia recycled percolation or ARP, ammonia fiber expansion or AFEX, and extractive ammonia or EA). We provide detailed insight into the distinct physicochemical mechanisms employed during ammonia-based pretreatments and its impact on downstream bioprocesses (e.g., enzymatic saccharification); such as modification of cellulose crystallinity, lignin/hemicellulose structure, and other ultrastructural changes such as cell wall porosity. Lastly, a brief overview of process technoeconomics and environmental impacts are discussed, along with recommendations for future areas of research on ammonia-based pretreatments.
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