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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. 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

4. 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

5. 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

6. 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

7. 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

8. 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

9. Energy and Food Security: Linkages through Price Volatility

Author:
Taghizadeh-Hesary, Farhad; Rasoulinezhad, Ehsan; Yoshino, Naoyuki
Source:
Energy policy 2019 v.128 pp. 796-806
ISSN:
0301-4215
Subject:
biofuels,   etc   ; agricultural products; energy; energy costs; food prices; food security; fossil fuels; inflation; models; oils; variance;     Show all 11 Subjects
Abstract:
... This study examines the linkages between energy price and food prices over the period 2000–2016 by using a Panel-VAR model in the case of eight Asian economies. Our results confirm that energy price (oil price) has a significant impact on food prices. According to the results of impulse response functions, agricultural food prices respond positively to any shock from oil prices. Our results show t ...
DOI:
10.1016/j.enpol.2018.12.043

10. Evaluation of photocatalytic thin film pretreatment on anaerobic degradability of exopolymer extracted biosolids for biofuel generation

Author:
Godvin Sharmila, V.; Gunasekaran, M.; Angappane, S.; Zhen, Guangyin; Tae Yeom, Ick; Rajesh Banu, J.
Source:
Bioresource technology 2019 v.279 pp. 132-139
ISSN:
0960-8524
Subject:
biofuels,   etc   ; activated sludge; annealing; biosolids; economic costs; methane; methane production; photocatalysis; sodium citrate; solubilization; titanium dioxide;     Show all 11 Subjects
Abstract:
... This study reports the result of sodium citrate induced exopolymer extraction on the photocatalytic thin film (TiO2) pretreatment efficiency of waste activated sludge (WAS). TiO2 is immobilized through DC spluttering method followed by annealing process. The exopolymer removal of 94.2% by sodium citrate (0.05 g/g SS) promotes better disintegration. This TiO2 thin film efficiently extricate the int ...
DOI:
10.1016/j.biortech.2019.01.124

11. Hydrochar derived from green waste by microwave hydrothermal carbonization

Author:
Shao, Yuchao; Long, Yuyang; Wang, Hengyi; Liu, Dongyun; Shen, Dongsheng; Chen, Ting
Source:
Renewable energy 2019 v.135 pp. 1327-1334
ISSN:
0960-1481
Subject:
biofuels,   etc   ; adsorbents; cellulose; economic evaluation; green waste; hemicellulose; hydrochars; hydrothermal carbonization; storage temperature; sustainable technology;     Show all 10 Subjects
Abstract:
... Green waste (GW), rich in cellulose and hemicellulose, is a valuable resource. Developing alternative sustainable technologies to utilize GW is attracting increasing attention. In this study, microwave hydrothermal carbonization (MHTC) process parameters including holding temperature, holding time, and liquid-to-solid ratio were optimized by a response surface design to tailor the properties of hy ...
DOI:
10.1016/j.renene.2018.09.041

12. Combined with fractional condensation to upgrade the liquid products derived from the co-pyrolysis of bio-oil distillation residue and bituminous coal

Author:
Zhu, Xiefei; Li, Shiying; Luo, Zejun; Zhu, Xifeng
Source:
Energy conversion and management 2019 v.185 pp. 586-592
ISSN:
0196-8904
Subject:
biofuels,   etc   ; coal; condensation (phase transition); condensers; distillation; linear models; liquids; pyrolysis; statistical analysis; temperature;     Show all 10 Subjects
Abstract:
... In this study, the effects of induction conditions on the distribution characteristics of graded bio-oil derived from the co-pyrolysis of bio-oil distillation residue and bituminous coal were investigated in a fixed pyrolysis reactor with a three-stage condenser. Based on the central composite design and statistical analysis, it could be found that a quadratic model was recommended to depict the t ...
DOI:
10.1016/j.enconman.2019.01.088

13. Do oil prices drive agricultural commodity prices? Further evidence in a global bio-energy context

Author:
Wei Su, Chi; Wang, Xiao-Qing; Tao, Ran; Oana-Ramona, Lobonţ
Source:
Energy 2019 v.172 pp. 691-701
ISSN:
0360-5442
Subject:
biofuels,   etc   ; agricultural prices; agricultural products; commodity prices; energy; models; oils; petroleum; world markets;     Show all 9 Subjects
Abstract:
... This study explores the causalities between oil and agricultural commodity prices to examine whether the vertical market integration model holds for global market. Considering structural changes, the long-run nexus using full-sample data is found to be unstable, suggesting the causality test is not reliable. Instead a time-varying rolling-window technique is further employed to reexamine the dynam ...
DOI:
10.1016/j.energy.2019.02.028

14. Microwave-assisted catalytic fast pyrolysis coupled with microwave-absorbent of soapstock for bio-oil in a downdraft reactor

Author:
Wang, Yunpu; Wu, Qiuhao; Yang, Sha; Yang, Qi; Wu, Junlin; Ma, Zhiyun; Jiang, Lin; Yu, Zhenting; Dai, Leilei; Liu, Yuhuan; Ruan, Roger; Fu, Guiming; Zhang, Bo; Zhu, Haibin
Source:
Energy conversion and management 2019 v.185 pp. 11-20
ISSN:
0196-8904
Subject:
biofuels,   etc   ; aromatic hydrocarbons; biomass; catalysts; microwave treatment; pyrolysis; silicon carbide; soapstock; temperature;     Show all 9 Subjects
Abstract:
... Microwave-assisted pyrolysis of biomass with HZSM-5 coupled with SiC as microwave-absorbent in a downdraft reactor is a promising method for obtaining hydrocarbon-rich bio-oil. The hydrocarbon content limits the economic and commercial viability of the bio-oil produced by pyrolysis. In this study, the effects of catalytic temperature, feedstock-to-catalyst ratio, and WHSV on the yield and composit ...
DOI:
10.1016/j.enconman.2019.01.101

15. Aircraft soot from conventional fuels and biofuels during ground idle and climb-out conditions: Electron microscopy and X-ray micro-spectroscopy

Author:
Liati, A.; Schreiber, D.; Alpert, P.A.; Liao, Y.; Brem, B.T.; Corral Arroyo, P.; Hu, J.; Jonsdottir, H.R.; Ammann, M.; Dimopoulos Eggenschwiler, P.
Source:
Environmental pollution 2019 v.247 pp. 658-667
ISSN:
0269-7491
Subject:
biofuels,   etc   ; X-radiation; air pollution; air quality; aircraft; airports; aviation; kerosene; mixing; soot; transmission electron microscopy;     Show all 11 Subjects
Abstract:
... Aircraft soot has a significant impact on global and local air pollution and is of particular concern for the population working at airports and living nearby. The morphology and chemistry of soot are related to its reactivity and depend mainly on engine operating conditions and fuel-type. We investigated the morphology (by transmission electron microscopy) and chemistry (by X-ray micro-spectrosco ...
DOI:
10.1016/j.envpol.2019.01.078

16. Catalytic pyrolysis of lignin in a cascade dual-catalyst system of modified red mud and HZSM-5 for aromatic hydrocarbon production

Author:
Wang, Shaoqing; Li, Zhihe; Bai, Xueyuan; Yi, Weiming; Fu, Peng
Source:
Bioresource technology 2019 v.278 pp. 66-72
ISSN:
0960-8524
Subject:
biofuels,   etc   ; catalysts; environmental impact; lignin; polycyclic aromatic hydrocarbons; pyrolysis; temperature; wastes;     Show all 8 Subjects
Abstract:
... Catalytic pyrolysis of lignin over a dual-catalyst system of modified red mud and HZSM-5 was carried out in a bench-scale micro-reactor. Effects of pyrolysis temperature, modified red mud to HZSM-5 ratio, catalysts to lignin ratio on the yield of products and selectivity of aromatic hydrocarbons were investigated. Results indicated that 550 °C was the optimal pyrolysis temperature with the maximal ...
DOI:
10.1016/j.biortech.2019.01.037

17. Assessment of heat-to-power ratio in a bio-oil sorption enhanced steam reforming and solid oxide fuel cell system

Author:
Wiranarongkorn, Kunlanan; Arpornwichanop, Amornchai
Source:
Energy conversion and management 2019 v.184 pp. 48-59
ISSN:
0196-8904
Subject:
biofuels,   etc   ; anodes; carbon dioxide; energy conservation; fuel cells; heat; power generation; primary energy; sorption; steam;     Show all 10 Subjects
Abstract:
... A solid oxide fuel cell (SOFC) is a high-efficiency technology for combined heat and power (CHP) generation. Heat and power production can be varied according to changes in heat and power loads, which affect the electrical and thermal efficiencies. This study analyzes changes in heat and power production rates of a bio-oil sorption enhanced steam reforming (SESR) and SOFC system. The variations in ...
DOI:
10.1016/j.enconman.2019.01.023

18. Production of bio-oil from fast pyrolysis of biomass using a pilot-scale circulating fluidized bed reactor and its characterization

Author:
Park, Jo Yong; Kim, Jae-Kon; Oh, Chang-Ho; Park, Jong-Wook; Kwon, Eilhann E.
Source:
Journal of environmental management 2019 v.234 pp. 138-144
ISSN:
0301-4797
Subject:
biofuels,   etc   ; Miscanthus; biomass; carbon; feedstocks; fossil fuels; fruits; physicochemical properties; pyrolysis; sawdust; water content;     Show all 11 Subjects
Abstract:
... To circumvent the adverse impacts arising from an excessive use of fossil fuels, bioenergy and chemical production from a carbon neutral resource (biomass) has drawn considerable attention over the last two decades. Among various technical candidates, fast pyrolysis of biomass has been considered as one of the viable technical routes for converting a carbonaceous material (biomass) into biocrude ( ...
DOI:
10.1016/j.jenvman.2018.12.104

19. Effects of liquefaction parameters of cellulose in supercritical solvents of methanol, ethanol and acetone on products yield and compositions

Author:
Wang, Xin; Xie, Xin-an; Sun, Jiao; Liao, Weiting
Source:
Bioresource technology 2019 v.275 pp. 123-129
ISSN:
0960-8524
Subject:
biofuels,   etc   ; acetone; cellulose; corn stover; esters; ethanol; liquefaction; methanol; solvents; temperature;     Show all 10 Subjects
Abstract:
... Cellulose extracted from cornstalk was liquefied in supercritical organic solvents at different liquefaction parameters. Different organic solvents (methanol, ethanol and acetone) were used to disintegrate cellulose at different temperatures (240, 260, 280, 300 and 320 °C), reaction time (0, 30, 60, 90 and 120 min) and solvents dosage (0, 80, 120, 160 and 200 mL). The results showed that similar l ...
DOI:
10.1016/j.biortech.2018.12.047

20. Measurement and prediction of mass transfer coefficients for syngas constituents in a hollow fiber reactor

Author:
Orgill, James J.; Abboud, Mike C.; Atiyeh, Hasan K.; Devarapalli, Mamatha; Sun, Xiao; Lewis, Randy S.
Source:
Bioresource technology 2019 v.276 pp. 1-7
ISSN:
0960-8524
Subject:
biofuels,   etc   ; bioreactors; carbon monoxide; fermentation; gas chromatography; hydrogen; liquids; mass transfer; models; prediction; solubility; synthesis gas;     Show all 12 Subjects
Abstract:
... Syngas fermentation for producing biofuels and other products suffers from mass transfer limitations due to low CO and H2 solubility in liquid medium. Therefore, it is critical to characterize mass transfer rates of these gases to guide bioreactor design and optimization. This work presents a novel technique to measure the volumetric mass transfer coefficients (kia) for H2 and CO using gas chromat ...
DOI:
10.1016/j.biortech.2018.12.092