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Xie, Yujiao
Publications (10 of 17) Show all publications
Xie, Y., Björkmalm, J., Ma, C., Willquist, K., Yngvesson, J., Wallberg, O. & Ji, X. (2018). Techno-economic evaluation of biogas upgrading using ionic liquids in comparison with industrially used technology in Scandinavian anaerobic digestion plants. Applied Energy, 227, 742-750
Open this publication in new window or tab >>Techno-economic evaluation of biogas upgrading using ionic liquids in comparison with industrially used technology in Scandinavian anaerobic digestion plants
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2018 (English)In: Applied Energy, ISSN 0306-2619, E-ISSN 1872-9118, Vol. 227, p. 742-750Article in journal (Refereed) Published
Abstract [en]

The process of biogas upgrading with ionic liquids, i.e. pure 1-butyl-3-methylimidazolium bis(trifluoro-methylsulfonyl)imide ([bmim][Tf2N]), aqueous choline chloride/urea (ChCl/Urea), and aqueous 1-allyl-3-methyl imidazole formate ([Amim][HCOO]), was simulated in Aspen Plus and compared with the conventional water scrubbing upgrading technique. The comparisons of the performances on the amount of recirculated solvents and energy usage show the following order: aqueous [Amim][HCOO]<aqueous ChCl/Urea<[bmim][Tf2N]<water. Six different co-digestion plants (anaerobic digestion, AD, plants) were surveyed to acquire data for comparison. The selected plants had different raw biogas production capacities and produced gas with differing methane content. The data confirmed the simulation results that the type of substrate and the configuration of AD process are two factors affecting energy usage, investment cost, as well as operation and maintenance costs for the subsequent biogas upgrading. In addition, the simulation indicated that the energy usage of the ionic liquid-based upgrading was lower than that of the conventional upgrading techniques in Scandinavian AD plants. The estimated cost including investment, operation and maintenance for the ionic liquid technology showed to be lower than that for the water scrubbing upgrading process.

Place, publisher, year, edition, pages
Elsevier, 2018
National Category
Energy Engineering
Research subject
Energy Engineering
Identifiers
urn:nbn:se:ltu:diva-65083 (URN)10.1016/j.apenergy.2017.07.067 (DOI)000445987200074 ()
Note

Validerad;2018;Nivå 2;2018-08-30 (andbra)

Available from: 2017-08-15 Created: 2017-08-15 Last updated: 2018-10-22Bibliographically approved
Xie, Y., Raut, D. G., Samikannu, R., Mikkola, J.-P. & Ji, X. (2017). A Thermodynamic Study of Aqueous 1-Allyl-3-Methylimidazolium Formate Ionic Liquid as a Tailored Sorbent for Carbon Dioxide Separation. Energy Technology, 5(8), 1464-1471
Open this publication in new window or tab >>A Thermodynamic Study of Aqueous 1-Allyl-3-Methylimidazolium Formate Ionic Liquid as a Tailored Sorbent for Carbon Dioxide Separation
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2017 (English)In: Energy Technology, ISSN 2194-4288, Vol. 5, no 8, p. 1464-1471Article in journal (Refereed) Published
Abstract [en]

In this work, aqueous 1-allyl-3-methylimidazolium formate ([Amim][HCOO]) was studied as a potential sorbent for CO2 separation. The density and viscosity of aqueous [Amim][HCOO] were measured at temperatures ranging from 293.15 to 333.15 K at atmospheric pressure. The solubility of CO2 and CH4 in dry [Amim][HCOO] as well as the CO2 solubility in aqueous [Amim][HCOO] were measured at pressures up to 1.8 MPa and temperatures of 298.2, 313.2, and 333.2 K. The results showed that the density and viscosity of aqueous [Amim][HCOO] as well as the CO2 solubility in aqueous [Amim][HCOO] decreased upon increasing the water concentration and temperature. The viscosity was very sensitive to the water concentration. The experimental density and viscosity of aqueous [Amim][HCOO] were fitted to semiempirical equations, and the excess molar volume and viscosity deviations were calculated to investigate the interaction between the [Amim][HCOO] ionic liquid and water. The experimental vapor–liquid equilibrium was represented with the nonrandom two-liquid and Redlich–Kwong model. The model parameters can be further implemented into Aspen Plus software to conduct process simulations.

Place, publisher, year, edition, pages
John Wiley & Sons, 2017
National Category
Energy Engineering
Research subject
Energy Engineering
Identifiers
urn:nbn:se:ltu:diva-62655 (URN)10.1002/ente.201600742 (DOI)000407591200041 ()2-s2.0-85017121238 (Scopus ID)
Note

Validerad;2017;Nivå 2;2017-08-16 (inah)

Available from: 2017-03-24 Created: 2017-03-24 Last updated: 2018-09-14Bibliographically approved
Ma, C., Xie, Y., Ji, X., Liu, C. & Lu, X. (2017). Modeling, simulation and evaluation of biogas upgrading using aqueous choline chloride/urea. Applied Energy, 229(1), 1269-1283
Open this publication in new window or tab >>Modeling, simulation and evaluation of biogas upgrading using aqueous choline chloride/urea
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2017 (English)In: Applied Energy, ISSN 0306-2619, E-ISSN 1872-9118, Vol. 229, no 1, p. 1269-1283Article in journal (Refereed) Published
Abstract [en]

Biogas has been considered as an alternative renewable energy, and raw biogas needs to be upgraded in order to be used as vehicle fuels or injected into the natural gas grid. In this work, the conceptual process for biogas upgrading using aqueous choline chloride (ChCl)/urea (1:2 on a molar basis) was developed, simulated and evaluated based on the commercialized software Aspen Plus. Reliable thermophysical properties and phase equilibria are prerequisite for carrying out process simulation. In order to carry out the process simulation, the thermophysical properties of ChCl/Urea (1:2) and its aqueous solutions as well as the phase equilibria of gas-ChCl/Urea (1:2), ChCl/Urea (1:2)-H2O and gas-ChCl/Urea (1:2)-H2O were surveyed and evaluated. After evaluation, the consistent experimental data of these thermophysical properties were fitted to the models embedded in Aspen Plus. The properties needed but without available experimental results were predicted theoretically. The Non-Random Two-Liquid model and the Redlich-Kwong equation (NRTL-RK) model were used to describe the phase equilibria. The equilibrium approach was used for process simulation. Sensitivity analysis was conducted to determine the reasonable operating parameters. With a set of reasonable operating conditions, the effects of ChCl/Urea (1:2) content on the total energy utilization, the diameters and pressure drops of absorber and desorber as well as the environmental assessment of the process were studied. The simulation results showed that, with the addition of ChCl/Urea (1:2), the total energy utilization decreased by 16% compared to the process with pure water, and the diameters of both absorber and desorber decreased with increasing content of ChCl/Urea (1:2). The process using aqueous ChCl/Urea (1:2) was more environmentally benign than that with pure water. Therefore, aqueous ChCl/Urea (1:2) is a promising solvent for biogas upgrading.

Place, publisher, year, edition, pages
Elsevier, 2017
Keywords
Aqueous choline chloride/urea; Thermodynamic modeling; Process simulation; Biogas upgrading
National Category
Energy Engineering
Research subject
Energy Engineering
Identifiers
urn:nbn:se:ltu:diva-63249 (URN)10.1016/j.apenergy.2017.03.059 (DOI)000449891500098 ()2-s2.0-85018938965 (Scopus ID)
Note

Validerad;2018;Nivå 2;2018-12-03 (inah)

Available from: 2017-05-05 Created: 2017-05-05 Last updated: 2019-04-24Bibliographically approved
Sarmad, S., Xie, Y., Mikkola, J.-P. & Ji, X. (2017). Screening of Deep Eutectic Solvents (DESs) as green CO2 sorbents: from solubility to viscosity. New Journal of Chemistry, 41(1), 290-301
Open this publication in new window or tab >>Screening of Deep Eutectic Solvents (DESs) as green CO2 sorbents: from solubility to viscosity
2017 (English)In: New Journal of Chemistry, ISSN 1144-0546, E-ISSN 1369-9261, Vol. 41, no 1, p. 290-301Article in journal (Refereed) Published
Abstract [en]

Deep eutectic solvents (DESs) as ionic liquid (IL) analogues show great potential for CO2 capture. They exhibit favorable solvent properties and are considered to be economical alternatives to conventional ILs. In this study, we prepare 35 DESs and screen them in terms of their CO2 solubility and viscosity, both crucial factors to be considered when designing efficient CO2 sorbents. The influence of salt and HBD type and structure, as well their molar ratio on the CO2 solubility and viscosity of the DESs is investigated. The viscosity and CO2 solubility of the DESs are compared with those of other DESs and conventional ILs. 15 DESs, which exhibit comparable CO2 absorption capacity to choline chloride-urea DESs, glycerol DESs and fluorinated ILs, are chosen as the promising ones. The viscosities of the selected DESs are below 200 mPa s and are lower than those of choline chloride-based DESs. Since the viscosity of the DESs is relatively high, on a par with those of conventional ILs, the effect of water as a co-solvent is investigated in order to decrease the viscosity. The addition of water to the glycerol-based DESs improves the kinetics of absorption by decreasing the viscosity, thus increasing the CO2 absorption capacity. Dry or aqueous DESs that demonstrate a high sorption capacity and low viscosity are chosen for additional analysis and characterization, and further functionalization will be carried out in the future to improve their sorption capacityy

Place, publisher, year, edition, pages
Royal Society of Chemistry, 2017
National Category
Energy Engineering
Research subject
Energy Engineering
Identifiers
urn:nbn:se:ltu:diva-60743 (URN)10.1039/c6nj03140d (DOI)000391451500034 ()2-s2.0-85007164346 (Scopus ID)
Note

Validerad; 2017; Nivå 2; 2017-01-13 (andbra)

Available from: 2016-11-28 Created: 2016-11-28 Last updated: 2018-11-16Bibliographically approved
Xie, Y., Dong, H., Zhang, S., Lu, X. & Ji, X. (2017). Solubilities of CO2, CH4, H2, CO and N2 in choline chloride/urea. Green Energy & Environment, 1(3), 195-200
Open this publication in new window or tab >>Solubilities of CO2, CH4, H2, CO and N2 in choline chloride/urea
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2017 (English)In: Green Energy & Environment, ISSN 2468-0257, Vol. 1, no 3, p. 195-200Article in journal (Refereed) Published
Abstract [en]

Solubilities of CO2, CH4, H2, CO and N2 in choline chloride/urea (ChCl/Urea) were investigated at temperatures ranging from 308.2 to 328.2 K and pressures ranging from 0.6 to 4.6 MPa. The results show that the solubilities of gases increase with increasing pressure and decreasing temperature. The solubility of CO2 is higher than that of CH4, H2, CO and N2, which indicates that ChCl/Urea may be used as a potential solvent for CO2 capture from the gas mixture. Solubility of CO2 in ChCl/Urea was fitted by Non-Random Two-Liquid and Redlich–Kwong (NRTL-RK) model, and solubility of CH4, H2, CO or N2 in ChCl/Urea was fitted by Henry's Law. The standard enthalpy, standard Gibbs energy and standard entropy of gases were calculated. Additionally, the CO2/CH4 selectivities in water, dry ChCl/Urea and aqueous ChCl/Urea were further discussed.

Place, publisher, year, edition, pages
Elsevier, 2017
National Category
Energy Engineering
Research subject
Energy Engineering
Identifiers
urn:nbn:se:ltu:diva-59706 (URN)10.1016/j.gee.2016.09.001 (DOI)
Note

Konferensartikel i tidskrift; 2017-03-28 (rokbeg)

Available from: 2016-10-12 Created: 2016-10-12 Last updated: 2018-09-13Bibliographically approved
Xie, Y. (2016). CO2 separation with ionic liquids - from properties to process simulation. (Doctoral dissertation). Luleå: Luleå University of Technology
Open this publication in new window or tab >>CO2 separation with ionic liquids - from properties to process simulation
2016 (English)Doctoral thesis, comprehensive summary (Other academic)
Place, publisher, year, edition, pages
Luleå: Luleå University of Technology, 2016
Series
Doctoral thesis / Luleå University of Technology 1 jan 1997 → …, ISSN 1402-1544
National Category
Energy Engineering
Research subject
Energy Engineering
Identifiers
urn:nbn:se:ltu:diva-349 (URN)978-91-7583-690-4 (ISBN)978-91-7583-691-1 (ISBN)
Public defence
2016-10-21, E231, Luleå tekniska universitets, Luleå, 09:00
Opponent
Supervisors
Available from: 2016-09-27 Created: 2016-09-27 Last updated: 2017-11-24Bibliographically approved
Xie, Y., Ma, C., Lu, X. & Ji, X. (2016). Evaluation of imidazolium-based ionic liquids for biogas upgrading (ed.). Paper presented at . Applied Energy, 175, 69-81
Open this publication in new window or tab >>Evaluation of imidazolium-based ionic liquids for biogas upgrading
2016 (English)In: Applied Energy, ISSN 0306-2619, E-ISSN 1872-9118, Vol. 175, p. 69-81Article in journal (Refereed) Published
Abstract [en]

The conceptual processes for biogas upgrading using three imidazolium-based ionic liquids ([hmim][Tf2N], [bmim][Tf2N] and [bmim][PF6]) were simulated in Aspen Plus to study the effect of properties of ionic liquids (ILs) on the process performance. To conduct the process simulation, each IL was input into Aspen Plus as a pseudo component, their critical properties were estimated by group contribution method, and their thermo-physical properties were correlated from the available experimental data by semi-empirical equations. The gas solubility in ILs was modeled with the non-random two-liquid model and Redlich–Kwong equation of state. Among the studied ILs, the simulation results show that the amount of recirculated solvents and the total energy consumption for upgrading process using ILs follow: [bmim][Tf2N] < [bmim][PF6] < [hmim][Tf2N]. The effects of density and viscosity of ILs on pressure drop and diameter of the absorber as well as the effects of operational pressures and temperatures on the process efficiency were investigated. It is found that the energy consumption increases with increasing pressure and temperature in the absorber and decreases with increasing pressure in the first flash tank. The ILs-based technology was further compared with water scrubbing and aqueous choline chloride/urea scrubbing, and the comparison shows that the total energy consumptions follow: 50%ChCl/Urea-water < [bmim][Tf2N] scrubbing < water scrubbing

National Category
Energy Engineering
Research subject
Energy Engineering
Identifiers
urn:nbn:se:ltu:diva-14642 (URN)10.1016/j.apenergy.2016.04.097 (DOI)000379370800006 ()2-s2.0-84964861430 (Scopus ID)e0eee864-bf1c-432f-bc64-351ba669f177 (Local ID)e0eee864-bf1c-432f-bc64-351ba669f177 (Archive number)e0eee864-bf1c-432f-bc64-351ba669f177 (OAI)
Note
Validerad; 2016; Nivå 2; 20160504 (andbra)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved
Zhang, Y., Ji, X., Xie, Y. & Lu, X. (2016). Screening of conventional ionic liquids for carbon dioxide capture and separation (ed.). Paper presented at . Applied Energy, 162, 1160-1170
Open this publication in new window or tab >>Screening of conventional ionic liquids for carbon dioxide capture and separation
2016 (English)In: Applied Energy, ISSN 0306-2619, E-ISSN 1872-9118, Vol. 162, p. 1160-1170Article in journal (Refereed) Published
Abstract [en]

CO2 capture and storage could efficiently mitigate CO2 emissions, wherein CO2 capture is a crucial energy-intensive process. Ionic liquids (ILs) have been proposed as potential liquid absorbents for CO2 separation. The CO2 absorption capacity and selectivity of ILs have also been investigated extensively. Although ILs have been screened for CO2 separation, only specific ILs have been examined in terms of energy consumption. In this study, 76 conventional ILs were collected and screened in terms of energy consumption to establish potential ILs for CO2 separation. Seventeen ILs were screened according to the CO2 dissolution enthalpy and CO2 working capacity criteria obtained from the Henry’s law constant in the preliminary screening. Seven ILs were then screened from the 17 ILs according to the CO2 working capacity from the measured CO2 solubility in the final screening. The energy consumptions of the seven screened ILs (i.e., [Emim][NTf2], [Bmim][BF4], [Bmim][PF6], [Bmim][NTf2], [Hmim][NTf2], [Bmpy][NTf2], and [Hmpy][NTf2]) were calculated, and the corresponding gas solubility selectivities were discussed. The energy consumptions and properties of the seven screened ILs were compared with those of the commercial CO2 absorbents of 30 wt% MEA, 30 wt% MDEA, and dimethyl ethers of polyethylene glycol (Selexol™ or Coastal AGR®). The results showed that the energy consumptions of the seven screened ILs were lower than those of the commercial CO2 absorbents. [Hmpy][NTf2] showed the lowest energy consumption among the seven screened ILs under the operating conditions set in this study.

National Category
Energy Engineering
Research subject
Energy Engineering
Identifiers
urn:nbn:se:ltu:diva-8120 (URN)10.1016/j.apenergy.2015.03.071 (DOI)000367631000101 ()2-s2.0-84926215618 (Scopus ID)696311de-c08c-42c1-9e04-e3f60f84e67c (Local ID)696311de-c08c-42c1-9e04-e3f60f84e67c (Archive number)696311de-c08c-42c1-9e04-e3f60f84e67c (OAI)
Note
Validerad; 2016; Nivå 2; 20150407 (andbra)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved
Xie, Y., Raut, D., Mikkola, J.-P. & Ji, X. (2015). Thermodynamic study on CO2 separation with a novel ionic liquid (ed.). Paper presented at Thermodynamics 2015 : 15/09/2015 - 18/09/2015. Paper presented at Thermodynamics 2015 : 15/09/2015 - 18/09/2015.
Open this publication in new window or tab >>Thermodynamic study on CO2 separation with a novel ionic liquid
2015 (English)Conference paper, Poster (with or without abstract) (Refereed)
Abstract [en]

1-allyl-3-methylimidazolium formate ([Amim][HCOO]) exhibited higher solubility for various polysaccharides because of the strong hydrogen bond ability. In this work, the density and viscosity of [Amim][HCOO] were measured at different temperatures, the CO2 and CH4 solubilities in [Amim][HCOO] were determined at temperatures from 298.15 to 333.15 K and at pressures up to 2 MPa. The density and viscosity of [Amim][HCOO] were fitted by semi-empirical equations, and the experimental gas solubility was represented by thermodynamic model. The energy consumption for CO2 separation was calculated and compared with the conventional ILs.

National Category
Energy Engineering
Research subject
Energy Engineering
Identifiers
urn:nbn:se:ltu:diva-31783 (URN)60f1f271-f72d-4408-93cf-e3b587f86364 (Local ID)60f1f271-f72d-4408-93cf-e3b587f86364 (Archive number)60f1f271-f72d-4408-93cf-e3b587f86364 (OAI)
Conference
Thermodynamics 2015 : 15/09/2015 - 18/09/2015
Note
Godkänd; 2015; 20150922 (yujxie)Available from: 2016-09-30 Created: 2016-09-30 Last updated: 2017-11-25Bibliographically approved
Xie, Y. (2014). CO2 Separation with Ionic Liquids -Property, Gas solubility and Energy consumption (ed.). (Licentiate dissertation). Paper presented at . : Luleå tekniska universitet
Open this publication in new window or tab >>CO2 Separation with Ionic Liquids -Property, Gas solubility and Energy consumption
2014 (English)Licentiate thesis, comprehensive summary (Other academic)
Abstract [en]

Ionic liquids (ILs) have shown great potential to be used as liquid absorbents for CO2 capture because of its advantages, such as non-volatility, functionality, high CO2 solubility and lower energy requirements for regeneration. A significant amount of research has been carried out, but most of them are on the synthesis of novel ILs and the measurements of CO2 solubility in ILs. However, the application of IL-based technology for CO2 capture requires knowledge of gas solubility, the effect of other components on CO2 solubility, the thermo-physical properties, modeling as well as process simulation. Therefore, a tremendous gap exists between new technology development and implementation. The goal of this work is to perform a systematic study from experimental measurement, model development to process simulation in order to promote the development and application of IL-based technology for CO2 capture. In this work, the solubilities of CO2, CH4, H2, CO and N2 in choline chloride (ChCl)/urea (1:2 on a molar basis) were determined. The effect of water on the density, viscosity and CO2 solubility in ChCl/urea (1:2) were measured. The experimental gas solubility data was represented with the Non Random Two Liquid - Redlich Kwong (NRTL-RK) model. The results show that the addition of water significantly decreases the viscosity of ChCl/urea (1:2) while the effects on their density and CO2 solubility are much weaker. The excess molar volume and excess molar activation energy were calculated based on the experimental density and viscosity data. It was found that the intermolecular interaction between ChCl/urea and water is strong, and the hydrogen bond interaction is influenced by the temperature and water concentration. Meanwhile, the experimental data of CO2 solubility in imidazolium-based ILs at pressures below 10 MPa was surveyed and evaluated by NRTL-RK model. The CO2 absorption enthalpy and the energy consumption for a CO2 separation process using ILs by pressure swing and/or temperature swing were investigated. The results reveal that the temperature-dependent Henry’s constant is an important factor for energy consumption analysis in a pressure swing process, while the heat capacity of ILs plays a more important role in a temperature swing process.

Place, publisher, year, edition, pages
Luleå tekniska universitet, 2014
Series
Licentiate thesis / Luleå University of Technology, ISSN 1402-1757
National Category
Energy Engineering
Research subject
Energy Engineering
Identifiers
urn:nbn:se:ltu:diva-17174 (URN)20944dd3-0a21-4af3-91ad-96b94ba19e5a (Local ID)978-91-7583-115-2 (ISBN)978-91-7583-116-9 (ISBN)20944dd3-0a21-4af3-91ad-96b94ba19e5a (Archive number)20944dd3-0a21-4af3-91ad-96b94ba19e5a (OAI)
Note
Godkänd; 2014; 20141020 (yujxie); Nedanstående person kommer att hålla licentiatseminarium för avläggande av teknologie licentiatexamen. Namn: Yujiao Xie Ämne: Energiteknik/Energy Engineering Uppsats: CO2 Separation with Ionic Liquids – Property, Gas Solubility and Energy Consumption Examinator: Bitr Professor Xiaoyan Ji, Institutionen för teknikvetenskap och matematik, Luleå tekniska universitet Diskutant: Professor Päivi Elisa Mäki-Arvela, Åbo Akademi University, Finland Tid: Onsdag den 10 december 2014 kl 10.00 Plats: E632, Luleå tekniska universitetAvailable from: 2016-09-29 Created: 2016-09-29 Last updated: 2017-11-24Bibliographically approved
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