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1. Hydrodeoxygenation of crude bio-oil in situ in the bio-oil aqueous phase with addition of zero-valent aluminum

Author:
Yang, Tianhua; Shi, Linping; Li, Rundong; Li, Bingshuo; Kai, Xingping
Source:
Fuel processing technology 2019 v.184 pp. 65-72
ISSN:
0378-3820
Subject:
biofuels,   etc   ; aluminum; hydrogen;     Show all 3 Subjects
Abstract:
... This study investigated the influence of the ratios of zero-valent aluminum (ZV-Al) to bio-oil aqueous phase (1/25, 1.5/25, and 2/25 g/mL) on hydrodeoxygenation (HDO) of crude bio-oil (CBO) with in situ hydrogen generated via the reaction of ZV-Al and the aqueous phase. The reaction of ZV-Al and the aqueous phase produced more hydrogen than the reaction of ZV-Al and water due to the aqueous phase ...
DOI:
10.1016/j.fuproc.2018.10.025

2. Productivity of innovation in biofuel technologies

Author:
Arnold, Michelle; Tainter, Joseph A.; Strumsky, Deborah
Source:
Energy policy 2019 v.124 pp. 54-62
ISSN:
0301-4215
Subject:
biofuels,   etc   ; public policy; United States;     Show all 3 Subjects
Abstract:
... Biofuels are a regular focus of public policy. The productivity of innovation in biofuel technologies is rarely addressed either in research or policy. Yet as innovation in any field grows complex and costly it can experience reductions in productivity and diminishing returns to investments. We examine here the productivity of investments in the technologies used to produce biofuels, using data fr ...
DOI:
10.1016/j.enpol.2018.09.005

3. Influences of operating parameters on liquefaction performances of Tetra Pak in sub-/supercritical water

Author:
Wang, Yuzhen; Zhu, Yitong; Liu, Zhuan; Su, Jian; Fang, Changqing; Xu, Donghai; Song, Wenhan; Wang, Shuzhong
Source:
Journal of environmental management 2019 v.237 pp. 545-551
ISSN:
0301-4797
Subject:
biofuels,   etc   ; energy recovery; liquefaction; moieties; temperature; wastes;     Show all 6 Subjects
Abstract:
... Liquefaction performances of waste Tetra Pak in sub-/supercritical water were evaluated in micro-batch reactors. The influences of temperature (300–420 °C), pressure (16–24 MPa), residence time (5–60 min) and feed concentration (5–40 wt%) on bio-oil yield, high heating value (HHV), and functional groups in bio-oil were investigated. The results showed that bio-oil yield firstly increased with incr ...
DOI:
10.1016/j.jenvman.2019.02.114

4. Novel helical screw-fluidized bed reactor for bio-oil production in slow-pyrolysis mode: A preliminary study

Author:
Qureshi, Khan Muhammad; Abnisa, Faisal; Wan Daud, Wan Mohd Ashri
Source:
Journal of analytical and applied pyrolysis 2019
ISSN:
0165-2370
Subject:
biofuels,   etc   ; byproducts; liquids; oxygen; pyrolysis; vapors;     Show all 6 Subjects
Abstract:
... Slow pyrolysis has been generally recognized as an improper mode of bio-oil production because it produces a low liquid yield of ˜30 wt.%. This research introduces a type of innovation in which the designed helical screw-fluidized bed reactor can operate in the slow-pyrolysis mode to obtain high-yielding liquids. The concept of the reactor was designed to develop the fluidization condition by usin ...
DOI:
10.1016/j.jaap.2019.04.021

5. Recent trends in integrated bioprocesses: aiding and expanding microbial biofuel/biochemical production

Author:
Flores, Andrew; Wang, Xuan; Nielsen, David R
Source:
Current opinion in biotechnology 2019
ISSN:
0958-1669
Subject:
biofuels,   etc   ; bioprocessing; biosynthesis; catalysts; synthesis; toxicity;     Show all 6 Subjects
Abstract:
... Microbial biosynthesis of fuels and chemicals represents a promising route for their renewable production. Product toxicity, however, represents a common challenge limiting the efficacy of this approach. Integrated bioprocesses incorporating in situ product separation are poised to help address this intrinsic problem, but suffer their own unique shortcomings. To improve and expand the utility of t ...
DOI:
10.1016/j.copbio.2019.02.007

6. Towards a sustainable bio-fuels production from lignocellulosic bio-oils: Influence of operating conditions on the hydrodeoxygenation of guaiacol over a Mo2C/CNF catalyst

Author:
Remón, Javier; Ochoa, Elba; Foguet, Carlos; Pinilla, José Luis; Suelves, Isabel
Source:
Fuel processing technology 2019 v.191 pp. 111-120
ISSN:
0378-3820
Subject:
biofuels,   etc   ; catalysts; guaiacol; hydrogen; lignocellulose; molecular weight; temperature; thermodynamics;     Show all 8 Subjects
Abstract:
... This work firstly provides a thorough insight into the effects of the operating conditions (catalyst loading, initial H2 pressure temperature, reaction time, H2/guaiacol ratio and liquid reaction volume) on the hydrodeoxygenation (HDO) of guaiacol over a Mo2C/CNF catalyst. Under the operating condition tested, gas and solid formation was negligible and guaiacol was primary converted to different l ...
DOI:
10.1016/j.fuproc.2019.04.008

7. Design of bio-oil additives using mathematical optimisation tools considering blend functionality and sustainability aspects

Author:
Neoh, Jie Qi; Chin, Hon Huin; Mah, Angel Xin Yee; Aboagwa, Omar Anas; Thangalazhy-Gopakumar, Suchithra; Chemmangattuvalappil, Nishanth G.
Source:
Sustainable Production and Consumption 2019 v.19 pp. 53-63
ISSN:
2352-5509
Subject:
biofuels,   etc   ; additives; carbon; models; solvents; viscosity; water content;     Show all 7 Subjects
Abstract:
... In this work, a computer-aided molecular design based technique has been developed to upgrade bio-oil properties via solvent addition by targeting both functionality and sustainability targets. The direct application of bio-oils as a fuel is often constrained by their inferior properties such as high water content, high viscosity, low heating values, low miscibility, and storage instability as com ...
DOI:
10.1016/j.spc.2019.03.005

8. Improvement of continuous hydrogen production using individual and binary enzymatic hydrolysates of agave bagasse in suspended-culture and biofilm reactors

Author:
Montoya-Rosales, José de Jesús; Olmos-Hernández, Diana Karime; Palomo-Briones, Rodolfo; Montiel-Corona, Virginia; Mari, Angelo Gabriel; Razo-Flores, Elías
Source:
Bioresource technology 2019 v.283 pp. 251-260
ISSN:
0960-8524
Subject:
biofuels,   etc   ; bagasse; biofilm; energy; hydrogen; hydrogen production; hydrolysates; hydrolysis;     Show all 8 Subjects
Abstract:
... Continuous hydrogen (H2) production from individual (Stonezyme, IH) and binary (Celluclast-Viscozyme, BH) enzymatic hydrolysates of agave bagasse was evaluated in continuous stirred-tank reactors (CSTR) and trickling bed reactors (TBR). The volumetric H2 production rates (VHPR) in CSTR were 13 and 2.25 L H2/L-d with BH and IH, respectively. Meanwhile, VHPR of 5.76 and 2.0 L H2/L-d were obtained in ...
DOI:
10.1016/j.biortech.2019.03.072

9. Pyrolysis of the aromatic-poor and aromatic-rich fractions of bio-oil: Characterization of coke structure and elucidation of coke formation mechanism

Author:
Xiong, Zhe; Syed-Hassan, Syed Shatir A.; Hu, Xun; Guo, Junhao; Qiu, Jihua; Zhao, Xingyu; Su, Sheng; Hu, Song; Wang, Yi; Xiang, Jun
Source:
Applied energy 2019 v.239 pp. 981-990
ISSN:
0306-2619
Subject:
biofuels,   etc   ; aromatic compounds; elemental composition; moieties; pyrolysis; steam; temperature;     Show all 7 Subjects
Abstract:
... Coke formation is one major problem during thermal conversion of bio-oil and its main components. Fundamental knowledge about the evolution of the structure of cokes is a prerequisite towards a deep understanding of coking of bio-oil. This study investigates the structure (morphology, elemental composition, O-containing functional groups and aromatic structures) of cokes generated from the pyrolys ...
DOI:
10.1016/j.apenergy.2019.01.253

10. Hydrothermal liquefaction of cellulose in ammonia/water

Author:
Xu, Zhi-Xiang; Cheng, Jin-Hong; He, Zhi-Xia; Wang, Qian; Shao, Yue-Wen; Hu, Xun
Source:
Bioresource technology 2019 v.278 pp. 311-317
ISSN:
0960-8524
Subject:
biofuels,   etc   ; ammonia; cellulose; heterocyclic nitrogen compounds; hydrothermal liquefaction; spectroscopy; temperature;     Show all 7 Subjects
Abstract:
... In order to obtain the N-containing organics from cellulose under mild conditions, hydrothermal liquefaction of cellulose in the presence of ammonia was conducted in this study. The results showed that the increasing reaction temperature and prolonging time facilitated the conversion of cellulose in hydrothermal liquefaction (HTL) with NH3·H2O and decreased the amount of solid residue. Reaction te ...
DOI:
10.1016/j.biortech.2019.01.061

11. Biomass-related sustainability: A review of the literature and interpretive structural modeling

Author:
Azevedo, Susana Garrido; Sequeira, Tiago; Santos, Marcelo; Mendes, Luis
Source:
Energy 2019 v.171 pp. 1107-1125
ISSN:
0360-5442
Subject:
biofuels,   etc   ; biomass; energy; fuel production; models; production costs; professionals; technology;     Show all 8 Subjects
Abstract:
... In this paper we identify a concept of countries' biomass-related sustainability through a revision of the literature and the opinion of professionals, and identify the main reasons that prevent biomass from being a major source of energy production (adversities and constraints). The Interpretive Structural Modeling (ISM) methodology was used for establishing the causal and hierarchical relationsh ...
DOI:
10.1016/j.energy.2019.01.068

12. An overview of the recent trends on the waste valorization techniques for food wastes

Author:
Nayak, A.; Bhushan, Brij
Source:
Journal of environmental management 2019 v.233 pp. 352-370
ISSN:
0301-4797
Subject:
biofuels,   etc   ; adsorbents; byproducts; food waste; value added; water content;     Show all 6 Subjects
Abstract:
... A critical and up-to-date review has been conducted on the latest individual valorization technologies aimed at the generation of value-added by-products from food wastes in the form of bio-fuels, bio-materials, value added components and bio-based adsorbents. The aim is to examine the associated advantages and drawbacks of each technique separately along with the assessment of process parameters ...
DOI:
10.1016/j.jenvman.2018.12.041

13. A complete assessment on the impact of in-cylinder and external blending of eucalyptus oil on engine’s behavior of a biofuel-based dual fuel engine

Author:
Masimalai, Senthilkumar; Subramaniyan, Arulselvan
Source:
Environmental science and pollution research international 2019 v.26 no.8 pp. 7938-7953
ISSN:
0944-1344
Subject:
biofuels,   etc   ; Eucalyptus; combustion; emissions; energy; mixing; nitric oxide; oils; smoke;     Show all 9 Subjects
Abstract:
... This work aims at combusting a high viscous high cetane biofuel completely and efficiently under dual combustion mode using another low viscous low cetane biofuel. Maduca longifolia oil (MO) was selected as the base fuel. Combustion was achieved by using EFI (electronic fuel injection) and carburetion of eucalyptus oil at the intake manifold. Eucalyptus oil was also blended externally with MO at d ...
DOI:
10.1007/s11356-019-04285-0

14. Drying kinetics and effective water diffusivities in olive stone and olive-tree pruning

Author:
Cuevas, Manuel; Martínez-Cartas, María Lourdes; Pérez-Villarejo, Luis; Hernández, Lucía; García-Martín, Juan Francisco; Sánchez, Sebastián
Source:
Renewable energy 2019 v.132 pp. 911-920
ISSN:
0960-1481
Subject:
biofuels,   etc   ; diffusivity; drying; drying temperature; equations; models; olives; prediction;     Show all 8 Subjects
Abstract:
... Drying kinetics of olive stone and olive-tree pruning, two important biomasses from olive culture, was experimentally assessed at six different temperatures (from 343 K to 393 K) and four sample thicknesses (from 15 to 50 mm). Analysis of the drying curves revealed that Page's model was suitable for predicting the drying characteristics of both solid biofuels. From this analysis, two new mathemati ...
DOI:
10.1016/j.renene.2018.08.053

15. Recovery of resin acids from fast pyrolysis of pine

Author:
Kim, Kwang Ho; Daugaard, Tannon J.; Smith, Ryan; Mba-Wright, Mark; Brown, Robert C.
Source:
Journal of analytical and applied pyrolysis 2019 v.138 pp. 132-136
ISSN:
0165-2370
Subject:
biofuels,   etc   ; Pinus; aerosols; fluidized beds; pyrolysis; resin acids; temperature; wood;     Show all 8 Subjects
Abstract:
... The potential recovery of resin acids from the fast pyrolysis of pine was assessed using both a batch micropyrolyzer and continuous fluidized bed reactor. Fast pyrolysis in the micropyrolyzer was conducted at 200 to 600 °C to determine the optimal pyrolysis temperature for the recovery of resin acids from pine. Maximum yield of resin acids occurred at 500 °C. Pyrolysis in a continuous fluidized be ...
DOI:
10.1016/j.jaap.2018.12.016

16. Numerical simulation and experiment on catalytic upgrading of biomass pyrolysis vapors in V-shaped downer reactors

Author:
Zhang, Yuchun; Yi, Weiming; Fu, Peng; Li, Zhihe; Wang, Nana; Tian, Chunyan
Source:
Bioresource technology 2019 v.274 pp. 207-214
ISSN:
0960-8524
Subject:
biofuels,   etc   ; biomass; catalysts; catalytic activity; hydrodynamics; mathematical models; pyrolysis; vapors;     Show all 8 Subjects
Abstract:
... Catalytic upgrading of biomass pyrolysis vapors is an effective utilization technology of biomass energy. Based on the disadvantages of commonly used reactors, the V-shaped downer reactors were designed to increase gas-solid two-phase turbulent intensity, contact frequency and then increase the catalytic efficiency in short residence time. The catalytic upgrading of pyrolysis vapors in V-shaped do ...
DOI:
10.1016/j.biortech.2018.11.093

17. Pyrolysis of palm kernel shell with internal recycling of heavy oil

Author:
Huang, Yong; Gao, Yaxuan; Zhou, Hao; Sun, Hongqi; Zhou, Jianbin; Zhang, Shu
Source:
Bioresource technology 2019 v.272 pp. 77-82
ISSN:
0960-8524
Subject:
biofuels,   etc   ; acetic acid; feedstocks; hydrogen; oils; phenol; pyrolysis; recycling; sorption;     Show all 9 Subjects
Abstract:
... This paper investigated pyrolysis of palm kernel shell in a proposed reactor, which is characterized by internal recycling of heavy oil between a heavy oil sorption zone and pyrolysis zone. The internal recycling of heavy oil favors conversion of heavy oil to char, gas, and light oil. Compared with the product distribution from the conventional pyrolysis without heavy oil recycling, the yields of ...
DOI:
10.1016/j.biortech.2018.10.006

18. Tools and strategies for constructing cell-free enzyme pathways

Author:
Petroll, Kerstin; Kopp, Dominik; Care, Andrew; Bergquist, Peter L.; Sunna, Anwar
Source:
Biotechnology advances 2019 v.37 no.1 pp. 91-108
ISSN:
0734-9750
Subject:
biofuels,   etc   ; biocatalysis; drugs; economics; enzymatic reactions; enzymes; hosts; models; viability;     Show all 9 Subjects
Abstract:
... Single enzyme systems or engineered microbial hosts have been used for decades but the notion of assembling multiple enzymes into cell-free synthetic pathways is a relatively new development. The extensive possibilities that stem from this synthetic concept makes it a fast growing and potentially high impact field for biomanufacturing fine and platform chemicals, pharmaceuticals and biofuels. Howe ...
DOI:
10.1016/j.biotechadv.2018.11.007

19. Bioprocessing Butanol into More Valuable Butyl Butyrate

Author:
Xin, Fengxue; Zhang, Wenming; Jiang, Min
Source:
Trends in biotechnology 2019
ISSN:
0167-7799
Subject:
biofuels,   etc   ; beverages; bioprocessing; biotransformation; butanol; butyrates; fermentation; toxicity;     Show all 8 Subjects
Abstract:
... The toxicity of butanol to microbial cells makes it difficult to scale-up the acetone–butanol–ethanol (ABE) fermentation process. Bioconversion of butanol into more valuable and nontoxic short-chain esters, such as butyl butyrate which is widely used in the food, beverage, and biofuel sectors, offers a promising alternative. ...
DOI:
10.1016/j.tibtech.2019.03.012

20. Photobiological hydrogen production via immobilization: understanding the nature of the immobilization and investigation on various conventional photobioreactors

Author:
Canbay, Eren; Kose, Ayse; Oncel, SuphiS.
Source:
3 Biotech 2018 v.8 no.5 pp. 244
ISSN:
2190-572X
Subject:
biofuels,   etc   ; hydrogen production; microalgae; photobioreactors;     Show all 4 Subjects
Abstract:
... Hydrogen photoproduction from microalgae has been an emerging topic for biofuel development. However, low yield for large-scale cultivations seems to be the main challenge. Immobilization seems to be an alternative method for sustainable hydrogen generation. In this study we examined the bead stability, bead diameter and immobilization method in accordance with photobioreactors (PBR). 2.1 mm diame ...
DOI:
10.1007/s13205-018-1266-3