Improvement of lignin yield and purity from corncob in the presence of steam explosion and liquid hot pressured alcohol

Abstract

Non-food biomass such as corncob is a very abundant and promising feedstock for sustainable energy production in China. Many studies have focused on overcoming the barrier of saccharification of corncob. However, lignin was not well exploited as the renewable aromatic resource in nature since a simple single protocol usually cannot facilitate bio-recalcitrance or advanced methods (ionic liquid etc.)hardly met the economic viability on a plant scale. Here we provided an easy combined process which could reap pure, high-yield and low molecular weight lignin. Moreover, cellulose and hemicellulose were easy digested into value-added products (xylose and glucose). The results showed that: (1) the lignin rich fraction was pure and of a high-yield, main linkages was cleaved during the combined process; (2) hemicellulose was utterly removed and transformed into xylose; (3) the cellulose rich fraction was easy to digestion enzymatically and the glucose conversion was 95.7% of the theoretical value.

Conversion of rice husk biomass into reducing sugars: influence of pretreatment with water and [C16MIM][Br-] ionic liquid

“…Also, a small shoulder peak located at ~21° and a shift from peak at 21.8° to 22.5° can be seen, which ensure lattice expansion (Cheng et al, 2012) related to the changes in the structure of the cellulose matrix after the pretreatment process. Moreover, the change in the crystallinity was con rmed by the presence of two additional peaks located at 26.5° and 34.5° which represent the quarter length of one cellobiose unit (Ouyang et al, 2015).…”

Screening the growth inhibition mechanism of sulfate reducing bacteria by chitosan/lignosulfonate nanocomposite (CS@LS) in seawater media

“…LS has a broad (002) graphite-peak centered near 2θ ~ 22 • [30]. The CS@LS-1:1 NC showed a broad peak at 22.7 • , which may be due to the formation of a new binary framework that could disrupt the original structure of both CS and LS [23,36]. In the composite, the peak at 10.0 • disappeared, while the peak intensity at around 20.0 • decreased indicated a more amorphous phase of the composite.…”

Multipurpose Use of a Corncob Biomass for the Production of Polysaccharides and the Fabrication of a Biosorbent

“…For instance, energy-demanding processes (i.e., steam explosion and hot, pressured liquid alcohol) have been employed to treat corncobs and obtain a value-added product. 6 A lengthy and complex process consisting of soaking in a H 2 SO 4 solution, filtrating, washing, steaming, mashing, and finally xylanase-assisted hydrolysis were reported to produce xylooligosaccharides from corncobs. 41 Tedious procedures and hazardous chemicals were required for the preparation of a hyperbranched polyamide-modified corncob adsorbent.…”