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1. Designing Biobased Recyclable Polymers for Plastics

Author:
Hatti-Kaul, Rajni; Nilsson, Lars J.; Zhang, Baozhong; Rehnberg, Nicola; Lundmark, Stefan
Source:
Trends in biotechnology 2020 v.38 no.1 pp. 50-67
ISSN:
0167-7799
Subject:
feedstocks,   etc   ; biotechnology; energy; plastics; recycling;     Show all 5 Subjects
Abstract:
... Several concurrent developments are shaping the future of plastics. A transition to a sustainable plastics system requires not only a shift to fossil-free feedstock and energy to produce the carbon-neutral building blocks for polymers used in plastics, but also a rational design of the polymers with both desired material properties for functionality and features facilitating their recyclability. B ...
DOI:
10.1016/j.tibtech.2019.04.011

2. Synthetic Methylotrophy: A Practical Solution for Methanol-Based Biomanufacturing

Author:
Wang, Yu; Fan, Liwen; Tuyishime, Philibert; Zheng, Ping; Sun, Jibin
Source:
Trends in biotechnology 2020 v.38 no.6 pp. 650-666
ISSN:
0167-7799
Subject:
feedstocks,   etc   ; affordability; engineering; methanol; microorganisms; natural gas;     Show all 6 Subjects
Abstract:
... The increasing availability and affordability of natural gas has renewed interest in using methanol for bioproduction of useful chemicals. Engineering synthetic methylotrophy based on natural or artificial methanol assimilation pathways and genetically tractable platform microorganisms for methanol-based biomanufacturing is drawing particular attention. Recently, intensive efforts have been devote ...
DOI:
10.1016/j.tibtech.2019.12.013

3. Downstream of the bioreactor: advancements in recovering fuels and commodity chemicals

Author:
Cuellar, Maria C; Straathof, Adrie JJ
Source:
Current opinion in biotechnology 2020 v.62 pp. 189-195
ISSN:
0958-1669
Subject:
feedstocks,   etc   ; bioreactors; fuels; manufacturing; renewable energy sources;     Show all 5 Subjects
Abstract:
... Downstream processing aims at recovering the target product at the required specifications from the bioreactor effluent. Research and development in this field relies on experimental and mathematical tools at the levels of chemical components, unit operations and processes. Recently, advances have been made in addressing the broth mixture complexity early on, in incorporating high-throughput exper ...
DOI:
10.1016/j.copbio.2019.11.012

4. Improving the steam-cracking efficiency of naphtha feedstocks by mixed/separate processing

Author:
Karaba, Adam; Dvořáková, Veronika; Patera, Jan; Zámostný, Petr
Source:
Journal of analytical and applied pyrolysis 2020 v.146 pp. 104768
ISSN:
0165-2370
Subject:
feedstocks,   etc   ; ethylene; mixing; propylene; pyrolysis; temperature;     Show all 6 Subjects
Abstract:
... Naphtha feedstock used for the steam-cracking process is typically blended from several hydrocarbon source streams of composition varying in a broad range. This study aims at evaluation of the potential yield improvement, which could be obtained by separate steam-cracking of light and heavy sub-streams using tailored process parameters for each of the sub-streams. Laboratory pyrolysis reactor was ...
DOI:
10.1016/j.jaap.2019.104768

5. Microalgal Torrefaction for Solid Biofuel Production

Author:
Ho, Shih-Hsin; Zhang, Congyu; Tao, Fei; Zhang, Chaofan; Chen, Wei-Hsin
Source:
Trends in biotechnology 2020
ISSN:
0167-7799
Subject:
feedstocks,   etc   ; biofuels; biosynthesis; fuel production; microalgae; torrefaction;     Show all 6 Subjects
Abstract:
... Microalgae are recognized as promising feedstocks for biofuel production and have been intensively studied. However, a systematic investigation of the relationship between cellular components and fuel properties in microalgae is currently absent. This review introduces recent advances in microalgal torrefaction and critically evaluates the properties of torrefied products from the viewpoint of mol ...
DOI:
10.1016/j.tibtech.2020.02.009

6. Efficient C1 Elongation by Reversing α-Oxidation

Author:
Woolston, Benjamin M.
Source:
Trends in biotechnology 2019 v.37 no.12 pp. 1273-1276
ISSN:
0167-7799
Subject:
feedstocks,   etc   ; biotransformation; carbon; engineering;     Show all 4 Subjects
Abstract:
... Single carbon (C1) feedstocks are attractive for bioconversion, but native C1 assimilation pathways are difficult to engineer.Chou et al.developed a novel process for elongating the C1 compound formyl-CoA. Besides demonstrating a new approach for C1 bioconversion, this work paves the way for engineering synthetic methylotrophy into chassis organisms. ...
DOI:
10.1016/j.tibtech.2019.10.004

7. Synthesis of cAAC stabilized biradical of “Me₂Si” and “Me₂SiCl” monoradical from Me₂SiCl₂ – an important feedstock material

Author:
Sinhababu, Soumen; Kundu, Subrata; Siddiqui, Mujahuddin M.; Paesch, Alexander N.; Herbst-Irmer, Regine; Schwederski, Brigitte; Saha, Pinaki; Zhao, Lili; Frenking, Gernot; Kaim, Wolfgang; Stalke, Dietmar; Roesky, Herbert W.
Source:
Chemical communications 2019 v.55 no.31 pp. 4534-4537
ISSN:
1364-548X
Subject:
feedstocks,   etc   ; carbenes; chemical reactions;     Show all 3 Subjects
Abstract:
... The cyclic alkyl(amino) carbene (cAAC) coordinated biradical of dimethylsilicon was isolated as (cAAC)₂Me₂Si (1), (cAAC = C(CH₂)(CMe₂)₂N-2,6-i-Pr₂C₆H₃), synthesized from the reduction of Me₂SiCl₂ using two equivalents of KC₈ in the presence of two equivalents of cAAC. The reduction of Me₂SiCl₂ by one equivalent of KC₈ in the presence of one equivalent of cAAC resulted in the stable dimethylsilicon ...
DOI:
10.1039/c9cc01448a

8. Elucidation of the Reaction Network for the Oxidative Dehydrogenation of Butane to Butadiene

Author:
Tanimu, Gazali; Al-Khattaf, Sulaiman S.; Klein, Michael T.
Source:
Energy & fuels 2019 v.33 no.2 pp. 1473-1478
ISSN:
1520-5029
Subject:
feedstocks,   etc   ; butanes; dehydrogenation; fuels;     Show all 4 Subjects
Abstract:
... The reaction network for the oxidative dehydrogenation of n-butane to butadiene was examined. Delplots for experiments with n-butane, 1-butene, and 2-butene feeds were constructed. These analyses revealed that butadiene formed from both 1-butene and 2-butene. The experimental ratio of 2-butene and 1-butene was far from the equilibrium value, suggesting that the 2-butene to 1-butene equilibrium was ...
DOI:
10.1021/acs.energyfuels.8b04125

9. Influence of Reaction Reversibility on the Interpretation of Delplots of the Parallel-Series Reaction Network

Author:
Abo-Ghander, Nabeel S.; Klein, Michael T.
Source:
Energy & fuels 2019 v.33 no.2 pp. 1444-1449
ISSN:
1520-5029
Subject:
feedstocks,   etc   ; fuels; models;     Show all 3 Subjects
Abstract:
... The use of the Delplot analysis to interpret the experimental results from the parallel-series reaction network A→k1B→k3C; A→k2D under the influence of reaction reversibility was examined. A reactor model was used to test two experimental feeds, one with zero product species concentrations and the other with non-zero product species concentrations. The equilibrium constants K₁, K₂, and K₃ were var ...
DOI:
10.1021/acs.energyfuels.8b03649

10. Metrics for quantifying the circularity of bioplastics: The case of bio-based and biodegradable mulch films

Author:
Razza, Francesco; Briani, Cristiana; Breton, Tony; Marazza, Diego
Source:
Resources, conservation, and recycling 2020 v.159 pp. 104753
ISSN:
0921-3449
Subject:
feedstocks,   etc   ; biodegradability; biodegradation; bioplastics; composting; design for environment; mulches; soil;     Show all 8 Subjects
Abstract:
... The concept of circularity and its quantification through the Material Circularity Indicator (MCI) is well established for traditional plastic products. In this paper a methodological approach for calculating the circularity of bio-based and biodegradable (BB) products is proposed and applied to BB mulch films. BB products are different from traditional products in as much as they are sourced and ...
DOI:
10.1016/j.resconrec.2020.104753

11. Reducing the effect of non-volatile fatty acids (non-VFAs) on polyhydroxyalkanoates (PHA) production from fermented thermal-hydrolyzed sludge

Author:
Tu, Weiming; Zou, Yina; Wu, Menghan; Wang, Hui
Source:
International journal of biological macromolecules 2020 v.155 pp. 1317-1324
ISSN:
0141-8130
Subject:
feedstocks,   etc   ; adverse effects; carbon; microorganisms; polyhydroxyalkanoates; sludge; volatile fatty acids;     Show all 7 Subjects
Abstract:
... Thermal-hydrolyzed sludge (THS) can be fermented to produce volatile fatty acids (VFAs) rich liquids. These fermentative liquids are considered as a potential feedstock for polyhydroxyalkanoates (PHA) production. However, the presence of high levels of non-VFAs organics supporting the growth response instead of PHA accumulation hindered an efficient culture selection in a feast and famine regime. ...
DOI:
10.1016/j.ijbiomac.2019.11.103

12. Effluent recirculation enables near-complete oxidation of organics during supercritical water oxidation at mild conditions: A proof of principle

Author:
Zhang, Dongdong; Ghysels, Stef; Ronsse, Frederik
Source:
Chemosphere 2020 v.250 pp. 126213
ISSN:
0045-6535
Subject:
feedstocks,   etc   ; acetic acid; cellulose; lignin; models; oxidants; oxidation; recycling;     Show all 8 Subjects
Abstract:
... This work presents a continuous set-up for SCWO, which was operated at mild conditions (380 °C, 25 MPa, oxidant equivalence ratio of 2.0 and residence time of 26 s) to oxidize cellulose, lignin, and acetic acid as model compounds. The aim was to oxidize different organics consecutively to near completion in the same mild reaction conditions and set-up. These conditions can overcome some drawbacks ...
DOI:
10.1016/j.chemosphere.2020.126213

13. Sustainable feedstocks selection and renewable products allocation: A new hybrid adaptive utility-based consensus model

Author:
Gitinavard, Hossein; Shirazi, Mohsen Akbarpour; Fazel Zarandi, Mohammad Hossein
Source:
Journal of environmental management 2020 v.264 pp. 110428
ISSN:
0301-4797
Subject:
feedstocks,   etc   ; case studies; entropy; experts; markets; models; renewable resources; uncertainty;     Show all 8 Subjects
Abstract:
... Nowadays, preferred compromise response of renewable energies' demands regarding the candidate sustainable feedstocks is a crucial issue for market change management. Thus, selecting the most suitable sustainable feedstock is a key factor for optimum renewable products allocation problem. To address the issue, this study proposes a hybrid adaptive framework based on consensus evaluation approach, ...
DOI:
10.1016/j.jenvman.2020.110428

14. Recent advances in organosolv fractionation: Towards biomass fractionation technology of the future

Author:
Thoresen, Petter Paulsen; Matsakas, Leonidas; Rova, Ulrika; Christakopoulos, Paul
Source:
Bioresource technology 2020 v.306 pp. 123189
ISSN:
0960-8524
Subject:
feedstocks,   etc   ; biomass; catalysts; economic sustainability; fractionation; lignocellulose; solvents;     Show all 7 Subjects
Abstract:
... Organosolv treatment is among the most promising strategies for valorising lignocellulosic biomass and could facilitate the transition towards enhanced utilization of renewable feedstocks. However, issues such as inefficient solvent recycle and fractionation has to be overcome. The present review aims to address these issues and discuss the role of the components present during organosolv treatmen ...
DOI:
10.1016/j.biortech.2020.123189

15. Recent developments in Polyhydroxyalkanoates (PHAs) production – A review

Author:
Sabapathy, Poorna Chandrika; Devaraj, Sabarinathan; Meixner, Katharina; Anburajan, Parthiban; Kathirvel, Preethi; Ravikumar, Yuvaraj; Zabed, Hossain M.; Qi, Xianghui
Source:
Bioresource technology 2020 v.306 pp. 123132
ISSN:
0960-8524
Subject:
feedstocks,   etc   ; aeration; bioprocessing; common markets; models; plastics; polyhydroxyalkanoates;     Show all 7 Subjects
Abstract:
... Polyhydroxyalkanoates (PHAs) are inevitably a key biopolymer that has the potential to replace the conventional petrochemical based plastics that pose jeopardy to the environment globally. Even then the reach of PHA in the common market is so restricted. The economy of PHA is such that, even after several attempts the overall production cost seems to be high and this very factor surpasses PHAs usa ...
DOI:
10.1016/j.biortech.2020.123132

16. Ionic-Liquid-Based Bioisoprene Recovery Process Design

Author:
Chen, Yuqiu; Liu, Xinyan; Kontogeorgis, Georgios M.; Woodley, John M.
Source:
Industrial & engineering chemistry process design and development 2020 v.59 no.16 pp. 7355-7366
ISSN:
1520-5045
Subject:
feedstocks,   etc   ; fermentation; ionic liquids; isoprene; models; process design; thermodynamics;     Show all 7 Subjects
Abstract:
... Bioisoprene, which can be produced from renewable feedstocks through fermentation, is a promising alternative to petroleum-derived isoprene. However, challenges including the selection of feasible recovery techniques for bioisoprene should be addressed to achieve economic and technical competitiveness. In this work, ionic liquids (ILs) are first introduced as solvents for the recovery of bioisopre ...
DOI:
10.1021/acs.iecr.0c00146

17. Efficient and selective ethane-to-ethylene conversion assisted by a mixed proton and electron conducting membrane

Author:
Sun, Shichen; Huang, Kevin
Source:
Journal of membrane science 2020 v.599 pp. 117840
ISSN:
0376-7388
Subject:
feedstocks,   etc   ; artificial membranes; dehydrogenation; durability; ethane; ethylene; hydrogen; industry;     Show all 8 Subjects
Abstract:
... Direct conversion of alkanes into valuable chemicals has attracted significant interest in recent decades by academia and industry alike due to the vast economic potential. One type of such conversions is non-oxidative dehydrogenation (NODH), which is deemed advantageous over its oxidative counterpart in conversion and selectivity. However, coking-related degradation is a major challenge to the NO ...
DOI:
10.1016/j.memsci.2020.117840

18. Dry anaerobic digestion of organic waste: A review of operational parameters and their impact on process performance

Author:
Rocamora, Ildefonso; Wagland, Stuart T.; Villa, Raffaella; Simpson, Edmon W.; Fernández, Oliver; Bajón-Fernández, Yadira
Source:
Bioresource technology 2020 v.299 pp. 122681
ISSN:
0960-8524
Subject:
feedstocks,   etc   ; anaerobic digestion; bulking agents; inoculum; organic wastes; total solids;     Show all 6 Subjects
Abstract:
... Dry digestion is a suitable technology for treating organic wastes with varying composition such as the organic fraction of municipal solids waste. Yet, there is a need for further research to overcome some of the disadvantages associated with the high total solids content of the process. Optimisation of inoculum to substrate ratio, feedstock composition and size, liquid recirculation, bed compact ...
DOI:
10.1016/j.biortech.2019.122681

19. Engineering unnatural methylotrophic cell factories for methanol-based biomanufacturing: Challenges and opportunities

Author:
Zhu, Taicheng; Zhao, Tongxin; Bankefa, Olufemi Emmanuel; Li, Yin
Source:
Biotechnology advances 2020 v.39 pp. 107467
ISSN:
0734-9750
Subject:
feedstocks,   etc   ; fermentation; food production; methanol; models; synthetic biology;     Show all 6 Subjects
Abstract:
... Methanol is a very promising feedstock alternative to sugar-based raw materials for biomanufacturing because it does not compete with food production, is abundant and potentially sustainable in the future. Although methylotrophic fermentations have been practiced for decades, their applications are limited by technical drawbacks and insufficient knowledge of the physiology and metabolic regulation ...
DOI:
10.1016/j.biotechadv.2019.107467

20. Iridium/Acid Cocatalyzed Direct Access to Fused Indoles via Transfer Hydrogenative Annulation of Quinolines and 1,2-Diketones

Author:
Lu, Guangpeng; Xie, Feng; Xie, Rong; Jiang, Huanfeng; Zhang, Min
Source:
Organic letters 2020 v.22 no.6 pp. 2308-2312
ISSN:
1523-7052
Subject:
feedstocks,   etc   ; chemical reactions; chemical structure; indoles; iridium; quinolines;     Show all 6 Subjects
Abstract:
... Herein, we present an unprecedented iridium/acid cocatalyzed construction of fused indoles via transfer hydrogenative annulation of nonactivated quinolines and 1,2-diketones. The products are assembled via initial reduction followed by selective coupling of 1,2-diketones with the N and C8 sites of the quinolyl skeleton. The developed synthetic method features operational simplicity, readily availa ...
DOI:
10.1021/acs.orglett.0c00500