Enhancement of Recyclable pH-Responsive Lignin-Grafted Phosphobetaine on Enzymatic Hydrolysis of Lignocelluloses
| Autor: | Hongming Lou, Xinyi Liu, Xueqing Qiu, Feiyun Li, Cheng Cai, Yuxia Pang |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Renewable Energy
Sustainability and the Environment Chemistry General Chemical Engineering 02 engineering and technology General Chemistry Buffer solution Corncob 010402 general chemistry 021001 nanoscience & nanotechnology Phosphate 01 natural sciences Chloride 0104 chemical sciences chemistry.chemical_compound Sulfite Enzymatic hydrolysis medicine Environmental Chemistry Lignin Epichlorohydrin 0210 nano-technology Nuclear chemistry medicine.drug |
| Zdroj: | ACS Sustainable Chemistry & Engineering. 7:7926-7931 |
| ISSN: | 2168-0485 |
| DOI: | 10.1021/acssuschemeng.9b00647 |
| Popis: | Enzymatic conversion of lignocelluloses into fermentable sugar is a key step in the production of cellulosic ethanol. In this work, enzymatic hydrolysis lignin (EHL)-grafted phosphobetaine (EHLPB) was prepared, and the phosphobetaine intermediate, 3-chloro-2-hydroxypropyl(2-(trimethylammonio)ethyl)phosphate, was synthesized from phosphocholine chloride calcium salt and epichlorohydrin. EHLPB showed a pH-sensitive response. When pH ≥ 5.0, it was completely dissolved in the buffer solution, whereas 95.5% of EHLPPB was precipitated when pH ≤ 3.0. Adding 1.2 wt % EHLPB-210 can increase the high-solid enzymatic digestibility of Eu-SPORL (sulfite pretreatment to overcome recalcitrance of eucalyptus) and CCR (corncob residue) from 33.6% and 52.6% to 71.5% and 73.6%, respectively. After the enzymatic hydrolysis of Eu-SPORL, 95% of EHLPB-210 was recovered by adjusting the slurry pH from 5 to 3. The recovered EHLPB-210 still kept the ability to enhance enzymatic hydrolysis of lignocelluloses. Adding 1.2 wt % recove... |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|