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Liu, Y., Chen, J., Lu, X., Ji, X. & Wang, C. (2019). Reducing the agitation power consumption in anaerobic digestion of corn straw by adjusting the rheological properties. Paper presented at 10th International Conference on Applied Energy (ICAE2018) August 22-25, 2018, Hong Kong.. Energy Procedia, 158, 1267-1272
Open this publication in new window or tab >>Reducing the agitation power consumption in anaerobic digestion of corn straw by adjusting the rheological properties
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2019 (English)In: Energy Procedia, ISSN 1876-6102, E-ISSN 1876-6102, Vol. 158, p. 1267-1272Article in journal (Refereed) Published
Abstract [en]

Agitation power consumption (P) in the anaerobic digestion of biogas plants is a major part of the electric energy consumption. To reduce P by adjusting the rheological properties, in this work, the rheological properties of corn straw slurry were studied systematically with the consideration of the effects of TS, temperature and particle sizes. The P was calculated based on the rheological behaviour of corn straw slurry. The investigation shows that the thermophilic digestion is effective only for the slurry with a relatively high TS. The size-reduction is more effective at higher TS compared to the option of increasing temperature in order to improve the agitation power efficiency, and the value of P can be reduced by up to 48.11 %. Since the size-reduction can also increase the methane yield, the adjustment of particle sizes is a promising option to save P, especially at higher TS.

Place, publisher, year, edition, pages
Elsevier, 2019
Keywords
Rheological properties, Corn straw, Anaerobic digestion, Agitation power consumption
National Category
Energy Engineering
Research subject
Energy Engineering
Identifiers
urn:nbn:se:ltu:diva-73439 (URN)10.1016/j.egypro.2019.01.314 (DOI)
Conference
10th International Conference on Applied Energy (ICAE2018) August 22-25, 2018, Hong Kong.
Note

Konferensartikel i tidskrift

Available from: 2019-04-05 Created: 2019-04-05 Last updated: 2019-04-23Bibliographically approved
Wu, N., Ji, X., An, R., Liu, C. & Lu, X. (2017). Generalized Gibbs free energy of confined nanoparticles. AIChE Journal, 63(10), 4595-4603
Open this publication in new window or tab >>Generalized Gibbs free energy of confined nanoparticles
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2017 (English)In: AIChE Journal, ISSN 0001-1541, E-ISSN 1547-5905, Vol. 63, no 10, p. 4595-4603Article in journal (Refereed) Published
Abstract [en]

The nanoparticles generally show abnormal properties compared to those in the bulk phase, and they exhibit significant potential in various applications such as catalysis and energy conversion. However, the theoretical work for describing the properties of nanoparticles is limited with poor prediction capacity. In this work, the Gibbs free energy was studied, from both macroscope and microscope, predictive models were proposed to study the thermodynamic properties of nanoparticles with a generalized description of the Gibbs free energy considering the effects of surface-energy and the substrate contacted. The proposed model from the microscope was based on the corresponding states theory to describe the effect of the substrate on the Gibbs free energy of nanoparticles, in which the molecular parameter with a generalized constant was obtained from the melting point of metals due to sufficient experimental information. The comparison with the new measured experimental results proves the reliability of the model prediction

Place, publisher, year, edition, pages
John Wiley & Sons, 2017
National Category
Energy Engineering
Research subject
Energy Engineering
Identifiers
urn:nbn:se:ltu:diva-65165 (URN)10.1002/aic.15861 (DOI)000409146600030 ()2-s2.0-85026287046 (Scopus ID)
Note

Validerad;2017;Nivå 2;2017-09-21 (andbra)

Available from: 2017-08-17 Created: 2017-08-17 Last updated: 2018-07-10Bibliographically approved
Wu, J., Zhu, J., Mu, L., Shi, Y., Dong, Y., Feng, X. & Lu, X. (2016). High load capacity with ionic liquid-lubricated tribological system. Tribology International, 94, 315-322
Open this publication in new window or tab >>High load capacity with ionic liquid-lubricated tribological system
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2016 (English)In: Tribology International, ISSN 0301-679X, E-ISSN 1879-2464, Vol. 94, p. 315-322Article in journal (Refereed) Published
Abstract [en]

Engineering polymers with high glass transition temperature have been widely used in dynamic friction systems by oil or solid lubrication. However, in high-load systems, oil lubrication is less efficient due to the viscosity decrease at higher temperatures induced by friction heat. [Bmim][PF6] ionic liquid was used and compared with traditional L-HM46 oil and solid PTFE. Taking advantage of high [Bmim][PF6] viscosity, strong steel-[Bmim][PF6] but poor PEEK-[Bmim][PF6] interaction, the [Bmim][PF6] lubricated PEEK/steel slide falls in hydrodynamic lubrication and elastohydrodynamic lubrication region under 150–1500N. While the oil and PTFE both failed to lubricate under 800N.

Keywords
Polymer, Friction and wear, Solid, Liquid
National Category
Tribology (Interacting Surfaces including Friction, Lubrication and Wear)
Research subject
Machine Elements
Identifiers
urn:nbn:se:ltu:diva-73913 (URN)10.1016/j.triboint.2015.08.022 (DOI)
Available from: 2019-05-13 Created: 2019-05-13 Last updated: 2019-06-14Bibliographically approved
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Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0001-9244-6808

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