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You searched for subject:(hydrogen rich gas). Showing records 1 – 2 of 2 total matches.

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1. Nguyen, Duc-Khanh. Diluted combustion of methanol in spark-ignition engines with on-board fuel reforming.

Degree: 2019, Ghent University

Using methanol as an alternative fuel for gasoline engines can reduce CO2 emissions. Engines and fuel technology are scalable, compact and can be produced in a sustainable way. Methanol is the simplest liquid synthetic fuel, therefore has production advantages compared to more complex fuels. The CO2 emissions can be further decreased with a waste heat recovery system for fuel reforming. Thanks to a high hydrogen to carbon ratio and low reforming temperature, methanol was considered as the most promising fuel for onboard hydrogen production. The aim of this research was evaluating the efficiency improvement of methanol fueled spark-ignition engines with on-board fuel reforming. The research shows that the use of methanol produces a significant increase in engine efficiency compared to gasoline. With the addition of fuel reformates, engine efficiency further increases. However, the improvement is not as much as the increase in the heating value of the reforming product would suggest. Advisors/Committee Members: Verhelst, Sebastian, Sileghem, Louis.

Subjects/Keywords: Technology and Engineering; methanol; diluted combustion; spark-ignition engines; fuel reforming; molar expansion ratio; waste heat recovery; hydrogen-rich gas

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Nguyen, D. (2019). Diluted combustion of methanol in spark-ignition engines with on-board fuel reforming. (Thesis). Ghent University. Retrieved from http://hdl.handle.net/1854/LU-8614497

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

Nguyen, Duc-Khanh. “Diluted combustion of methanol in spark-ignition engines with on-board fuel reforming.” 2019. Thesis, Ghent University. Accessed October 20, 2019. http://hdl.handle.net/1854/LU-8614497.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Nguyen, Duc-Khanh. “Diluted combustion of methanol in spark-ignition engines with on-board fuel reforming.” 2019. Web. 20 Oct 2019.

Vancouver:

Nguyen D. Diluted combustion of methanol in spark-ignition engines with on-board fuel reforming. [Internet] [Thesis]. Ghent University; 2019. [cited 2019 Oct 20]. Available from: http://hdl.handle.net/1854/LU-8614497.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Nguyen D. Diluted combustion of methanol in spark-ignition engines with on-board fuel reforming. [Thesis]. Ghent University; 2019. Available from: http://hdl.handle.net/1854/LU-8614497

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation


Indian Institute of Science

2. Sandeep, Kumar. Expermental and Modeling Studies on the Generation of Hydrogen Rich Syngas through Oxy-Steam Gasification of Biomass.

Degree: 2016, Indian Institute of Science

The present work focuses on the study of biomass gasification process for generating hydrogen rich synthetic gas with oxy-steam as reactants using experiments and modeling studies. Utilization of the syngas as a fuel in general applications like fuel cells, Fischer-Tropsch FT) process and production of various chemicals like DME, etc. are being considered to meet the demand for clean energy. This study comprises of experiments using an open top down draft reactor with oxygen and steam as reactants in the co-current configuration. Apart from the standard gasification performance evaluation; parametric study using equivalence ratio, steam-to-biomass ratio as major variables towards generation of syngas is addressed towards controlling H2/CO ratio. The gasification process is modeled as a packed bed reactor to predict the exit gas composition, propagation rate, bed temperature as a function of input reactants, temperature and mass flux with variation in thermo-physical properties of biomass. These results are compared with the present experiments as well as those in literature. Experiments are conducted using modified open top downdraft configuration reactor with lock hoppers and provision for oxy-steam injection, and the exit gas is connected to the cooling and cleaning system. The fully instrumented system is used to measure bed temperatures, steam and exit gas temperature, pressures at various locations, flow rates of fuel, reactants and product gas along with the gas composition. Preliminary investigations focused on using air as the reactant and towards establishing the packed bed performance by comparing with the experimental results from the literature and extended the study to O2-N2 mixtures. The study focuses on determining the propagation rate of the flame front in the packed bed reactor for various operating conditions. O2 is varied between 20-100% (vol.) in a mixture of O2-N2 to study the effect of O2 fraction on flame propagation rate and biomass conversion. With the increase in O2 fraction, the propagation rates are found to be very high and reaching over 10 mm/s, resulting in incomplete pyrolysis and poor biomass conversion. The flame propagation rate is found to vary with oxygen volume fraction as XO22.5, and stable operation is achieved with O2 fraction below 30%. Towards introducing H2O as a reactant for enhancing the hydrogen content in the syngas and also to reduce the propagation rates at higher ER, wet biomass is used. Stable operating conditions are achieved using wet biomass with moisture-to-biomass (H2O:Biomass) ratio between 0.6 to 1.1 (mass basis) and H2 yield up to 63 g/kg of dry biomass amounting to 33% volume fraction in the syngas. Identifying the limitation on the hydrogen yield and the criticality of achieving high quality gas; oxy-steam mixture is introduced as reactants with dry biomass as fuel. An electric boiler along with a superheater is used to generate superheated steam upto 700 K and pressure in the range of 0.4 MPa. Steam-to-biomass ratio (SBR) and ER is varied with… Advisors/Committee Members: Dasappa, S.

Subjects/Keywords: Biomass Gasification Process; Hydrogen Rich Synthetic Gas; Gasification Performance Evaluation; Hydrogen – Fuel; Biomass Pyrolysis; Thermo-Chemical Conversion; Biomass Gasification; Oxy–steam Gasification; Oxy-steam Biomass Gasification.; Packed Bed; Packed Bed Gasification System; Hydrogen Generation; Fischer-Tropsch FT) Process; Wood Pyrolysis Model; Hydrogen Rich Syngas; Sustainable Technologies

Record DetailsSimilar RecordsGoogle PlusoneFacebookTwitterCiteULikeMendeleyreddit

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Sandeep, K. (2016). Expermental and Modeling Studies on the Generation of Hydrogen Rich Syngas through Oxy-Steam Gasification of Biomass. (Thesis). Indian Institute of Science. Retrieved from http://hdl.handle.net/2005/3144

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

Sandeep, Kumar. “Expermental and Modeling Studies on the Generation of Hydrogen Rich Syngas through Oxy-Steam Gasification of Biomass.” 2016. Thesis, Indian Institute of Science. Accessed October 20, 2019. http://hdl.handle.net/2005/3144.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Sandeep, Kumar. “Expermental and Modeling Studies on the Generation of Hydrogen Rich Syngas through Oxy-Steam Gasification of Biomass.” 2016. Web. 20 Oct 2019.

Vancouver:

Sandeep K. Expermental and Modeling Studies on the Generation of Hydrogen Rich Syngas through Oxy-Steam Gasification of Biomass. [Internet] [Thesis]. Indian Institute of Science; 2016. [cited 2019 Oct 20]. Available from: http://hdl.handle.net/2005/3144.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Sandeep K. Expermental and Modeling Studies on the Generation of Hydrogen Rich Syngas through Oxy-Steam Gasification of Biomass. [Thesis]. Indian Institute of Science; 2016. Available from: http://hdl.handle.net/2005/3144

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

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