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8.3
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Journals
Biomolecules
Special Issues
Lignocellulosic Biomass Catalysis
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Lignocellulosic Biomass Catalysis

A special issue of Biomolecules (ISSN 2218-273X).

Deadline for manuscript submissions: closed (1 November 2019) | Viewed by 6990

Special Issue Editors

Prof. Aurore Richel

E-Mail Website
Guest Editor
Laboratory of Biomass and Green Technologies, University of Liege, Liege, Belgium
Interests: lignin; lignocellulosic biomass; biofuels; biopolymers; biomass chemistry; thermochemical conversion; molecular approaches
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Chiaki Ogino

E-Mail Website
Guest Editor
Department of Chemical Science and Engineering, Graduate School of Engineering, Kobe University, Rokkoudai-chou 1-1, Nada, Kobe 657-8501, Japan
Interests: biorefinery; engineering; biotechnology; bioengineering; metabolic engineering
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues, 

Renewable resources, and in particular lignocellulosic biomass, play a predominant role in our future economy. The conversion of these highly heterogeneous lignocellulosic matrices relies on a cascade of transformation steps, amongst which the preliminary one, called “pretreatment”, is the most crucial. This pretreatment allows the cracking of lignocellulosic biomass into its major components, and can be ensured at low (below 300 °C) or high (up to 1000 °C) temperatures. Both the efficiency and selectivity of this pretreatment can be modulated by the addition of specific catalysts: thermo-stable and/or oxophilic, homogeneous or heterogeneous. The suitable selection of a specific catalyst is a key fundamental factor to assess in order to convert specific lignocellulosic biomasses, under low temperatures or thermochemical routes, into targeted solid, liquid, or gaseous intermediates; platform chemicals; or energy vectors. Moreover, the design or selection of specific catalysts could help in reducing process wastes (including associated environmental impacts).

We encourage scientists working on biomass conversion to contribute to this Special Issue through the publication of original research or review articles covering the fundamental study of the role of catalysts as pillars in the conversion of lignocellulosic biomass. Our objective is to propose an overview of the main “catalytic initiatives” all over the world, considering the geographical diversity of lignocellulosic biomass flows.

Prof. Aurore Richel
Prof. Chiaki Ogino
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Biomolecules is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2700 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • Renewable resources
  • Lignocellulose
  • Biofuels
  • Bioplastics
  • Catalysts
  • Chemical catalysts
  • Thermochemical conversions
  • Platform chemicals

Published Papers (2 papers)

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Research

14 pages, 1782 KiB  
Article
Pretreatment of Wheat Straw with Phosphoric Acid and Hydrogen Peroxide to Simultaneously Facilitate Cellulose Digestibility and Modify Lignin as Adsorbents
by Xue Wan, Fengpei Yao, Dong Tian, Fei Shen, Jinguang Hu, Yongmei Zeng, Gang Yang, Yanzong Zhang and Shihuai Deng
Biomolecules 2019, 9(12), 844; https://doi.org/10.3390/biom9120844 - 08 Dec 2019
Cited by 13 | Viewed by 3190
Abstract
Effective valorization of lignin is crucial to achieve a sustainable, economic and competitive biorefinery of lignocellulosic biomass. In this work, an integrated process was proposed based on a concentrated phosphoric acid plus hydrogen peroxide (PHP) pretreatment to simultaneously facilitate cellulose digestibility and modify [...] Read more.
Effective valorization of lignin is crucial to achieve a sustainable, economic and competitive biorefinery of lignocellulosic biomass. In this work, an integrated process was proposed based on a concentrated phosphoric acid plus hydrogen peroxide (PHP) pretreatment to simultaneously facilitate cellulose digestibility and modify lignin as adsorbent. As a dominant constitutor of PHP pretreatment, H2O2 input and its influence on the overall fractionation/lignin modification performance was thoroughly investigated. Results indicated that wheat straw was fractionated more efficiently by increasing the H2O2 input. H2O2 input had a significant influence on the digestibility of the obtained cellulose-rich fraction whereby almost 100.0% cellulose-glucose conversion can be achieved even with only 0.88% H2O2 input. Besides, the adsorption capacity of lignin on MB was improved (74.3 to 210.1 mg g−1) due to the oxidative-modification in PHP pretreatment with H2O2 inputs. Regression analysis indicated that –COOH groups mainly governed the lignin adsorption (R2 = 0.946), which displayed the considerable adsorption capacities for typical cationic substances. This work shows a promising way to integrate the lignin modification concept into the emerging PHP pretreatment process with the dual goal of both cellulose utilization and lignin valorization. Full article
(This article belongs to the Special Issue Lignocellulosic Biomass Catalysis)
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13 pages, 2133 KiB  
Article
Combining Autoclaving with Mild Alkaline Solution as a Pretreatment Technique to Enhance Glucose Recovery from the Invasive Weed Chloris barbata
by Abraham Kusi Obeng, Duangporn Premjet and Siripong Premjet
Biomolecules 2019, 9(4), 120; https://doi.org/10.3390/biom9040120 - 28 Mar 2019
Cited by 17 | Viewed by 3355
Abstract
Developing an optimum pretreatment condition to enhance glucose recovery assessed the potential of Chloris barbata, which is a common invasive weed in Thailand, as a feedstock for bioethanol production. Chloris barbata was exposed to autoclave-assisted alkaline pretreatment by using different sodium hydroxide [...] Read more.
Developing an optimum pretreatment condition to enhance glucose recovery assessed the potential of Chloris barbata, which is a common invasive weed in Thailand, as a feedstock for bioethanol production. Chloris barbata was exposed to autoclave-assisted alkaline pretreatment by using different sodium hydroxide (NaOH) concentrations (1% to 4%) and heat intensities (110 °C to 130 °C) that were dissipated from autoclaving. The optimum condition for pretreatment was determined to be 2% NaOH at 110 °C for 60 min. At this condition, maximum hydrolysis efficiency (90.0%) and glucose recovery (30.7%), as compared to those of raw C. barbata (15.15% and 6.20%, respectively), were observed. Evaluation of glucose production from 1000 g of C. barbata based on material balance analysis revealed an estimated yield of 304 g after pretreatment at the optimum condition when compared to that of raw C. barbata (61 g), an increase of five-fold. Structural analysis by the scanning electron microscopy (SEM) and X-ray diffraction (XRD) revealed the disruption of the intact structure of C. barbata and an increase in the cellulose crystallinity index (CrI), respectively. The results from this study demonstrate the efficiency of using C. barbata as a potential feedstock for bioethanol production. Full article
(This article belongs to the Special Issue Lignocellulosic Biomass Catalysis)
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