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Development and Technologies of Biomass Conversion Process, Biofuel Production and Biorefinery

A special issue of Energies (ISSN 1996-1073). This special issue belongs to the section "A4: Bio-Energy".

Deadline for manuscript submissions: 22 December 2025 | Viewed by 675

Special Issue Editors


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Guest Editor
School of Energy and Power Engineering, Xi’an Jiaotong University, Xi’an 710049, China
Interests: solid waste treatment and recycling; biomass/coal gasification and pyrolysis; oil recycling from oily sludge; hydrogen production with tar catalysis reforming; municipal solid waste to fuel; sewage sludge treatment and recycling; drying technology for high-moisture materials; microbial technology for solid waste treatment
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E-Mail Website
Guest Editor
Guangzhou Institute of Energy Conversion, Chinese Academy of Science, Guangzhou 510640, China
Interests: research on solid waste energy recovery; biomass-graded deconstruction and deoxygenation studies; oilfield hazardous waste treatment and resource utilization; the poly-generation system simulation study; life-cycle assessment and multi-objective decision analysis

E-Mail Website
Guest Editor
School of Energy and Power Engineering, Xi’an Jiaotong University, Xi’an 710049, China
Interests: solid waste treatment and resource utilization; clean and efficient use of coal and biomass; preparation and application of biomass-based carbon materials; CO2 capture and conversion; pyrolysis oil quality improvement and resource utilization

Special Issue Information

Dear Colleagues, 

The global shift toward sustainable energy systems has positioned biomass conversion and biorefinery technologies at the forefront of the energy transition. This Special Issue aims to capture innovative, interdisciplinary research advancing the development of energy-efficient and digitally integrated biomass conversion pathways. With a focus on next-generation biofuels and renewable energy carriers, the issue seeks to highlight scalable solutions that synergize chemical, biological, and electrochemical processes with intelligent control systems and real-time energy optimization.

Today’s biomass technologies must go beyond conventional energy outputs and address broader objectives such as circular resource utilization, real-time system optimization, and integration with smart energy grids. Innovations in catalytic engineering, bioprocess intensification, and AI-augmented modeling are unlocking new pathways for converting heterogeneous biomass feedstocks (e.g., lignocellulose, algae, organic municipal waste) into sustainable energy vectors such as biohydrogen, bioethanol, biogas, and sustainable aviation fuels (SAFs). The next generation of biorefineries will be inherently modular, digitally interconnected, and capable of co-producing bioenergy, platform chemicals, and value-added co-products with minimal carbon footprints.

Emerging approaches emphasize the synergistic integration of physical, chemical, and biological processes, frequently supported by advanced computational tools including machine learning, nonlinear optimization, digital twins, and real-time analytics. At the same time, techno-economic assessments (TEAs) and life cycle sustainability analyses (LCSAs) are crucial for ensuring the scalability and market readiness of these innovations.

We invite contributions that delve into the following research frontiers, which represent the most promising and high-impact directions in the field of biomass energy science:

  1. The coupling of biomass conversion with carbon capture, energy storage, and renewable power systems;
  2. The valorization of process by-products (e.g., syngas, biochar, organic acids) for energy recovery and circular economy applications;
  3. Thermochemical innovations: plasma-assisted, microwave, solar–thermal, and hybrid fuel generation;
  4. Advanced catalytic systems and novel catalysts for the selective and high-yield transformation of biomass into energy-rich compounds;
  5. Hybrid and intensified reactor configurations for continuous biofuel and energy carrier production;
  6. Digital twin technologies for predictive modeling and real-time energy optimization in bioprocesses;
  7. The multi-scale kinetic and thermodynamic modeling of biomass to energy conversion under dynamic process conditions;
  8. Techno-economic and life cycle energy assessments of novel biorefinery architectures.

Through the lens of energy science and engineering, this Special Issue seeks to establish a roadmap for next-generation biomass conversion technologies that are not only technically sound but also environmentally and economically sustainable. We welcome original research, critical reviews, and visionary perspectives from scholars and practitioners at the forefront of energy-focused sciences. 

Prof. Dr. Ningbo Gao
Dr. Fengchao Wang
Dr. Cui Quan
Guest Editors

Manuscript Submission Information

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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. Energies is an international peer-reviewed open access semimonthly 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 2600 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

  • biomass
  • conversion process
  • biofuel
  • biorefinery
  • thermal conversion

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Published Papers (1 paper)

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Research

17 pages, 3299 KB  
Article
Co-Pyrolysis Behavior of Energetic Materials and Pine Sawdust
by Cui Quan, Yufen Wang and Ningbo Gao
Energies 2025, 18(17), 4768; https://doi.org/10.3390/en18174768 - 8 Sep 2025
Viewed by 415
Abstract
Incineration is a widely adopted method for the disposal of waste energetic materials (SP). Nevertheless, this approach is associated with considerable thermal energy loss and significant environmental pollution. To address these limitations, this study proposes a co-pyrolysis process incorporating pine sawdust (SD) with [...] Read more.
Incineration is a widely adopted method for the disposal of waste energetic materials (SP). Nevertheless, this approach is associated with considerable thermal energy loss and significant environmental pollution. To address these limitations, this study proposes a co-pyrolysis process incorporating pine sawdust (SD) with SP. This technique utilizes the exothermic decomposition of energetic substances and the endothermic pyrolysis of biomass. Through this synergistic thermal interaction, the process enables efficient energy recovery and facilitates the resource valorization of SP. The pyrolysis kinetics and thermodynamics of SP, SD, and their blends were investigated. Synchronous thermal analysis examined the co-pyrolysis reaction heat at varying blend ratios, while the temperature’s effects on the gas–liquid–solid product distribution were explored. The results indicate that the apparent activation energy (Ea) required for co-pyrolysis of the SP and SD exhibits an initial increase followed by a decrease in both Stage 1 and Stage 2. Furthermore, the mean apparent activation energy (Eavg) during Stage 1 (FWO: 101.87 kJ/mol; KAS: 94.02 kJ/mol) is lower than that in Stage 2 (FWO: 110.44 kJ/mol; KAS: 100.86 kJ/mol). Co-pyrolysis reaction heat calculations indicated that SD addition significantly mitigates the exothermic intensity, shifts decomposition to higher temperatures (the primary exothermic zone shifted from 180–245 °C to 265–400 °C), and moderates heat release. Elevated temperatures increase the gas yield (CO and H2 are dominant). High temperatures promote aromatic bond cleavage and organic component release; the char’s calorific value correlates positively with the carbon content. Higher co-pyrolysis temperatures increase the nitrogenous compounds in the oil, while the aldehyde content peaks then declines. This work proposes a resource recovery pathway for SP, providing fundamental data for co-pyrolysis valorization or the development of catalytic conversion precursors. Full article
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