Effect Of Catalysts On The Formation Of Titanium Hydride Under Hydrogen Atmopshere
The research objective is to produce titanium hydride (TiH2) from the reaction between magnesium Hydride (MgH2) and titanium tetrachloride (TiCl4) under hydrogen atmosphere using catalysts such as nickel (Ni), ammonium chloride (NH4Cl) and calcium fluoride (CaF2). The experiment was performed by des...
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| Format: | Monograph |
| Language: | English |
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Universiti Sains Malaysia
2018
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| Online Access: | http://eprints.usm.my/52997/ http://eprints.usm.my/52997/1/Effect%20Of%20Catalysts%20On%20The%20Formation%20Of%20Titanium%20Hydride%20Under%20Hydrogen%20Atmopshere_Wong%20Jia%20Ying_B1_2018.pdf |
| _version_ | 1848882403226943488 |
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| author | Wong, Jia Ying |
| author_facet | Wong, Jia Ying |
| author_sort | Wong, Jia Ying |
| building | USM Institutional Repository |
| collection | Online Access |
| description | The research objective is to produce titanium hydride (TiH2) from the reaction between magnesium Hydride (MgH2) and titanium tetrachloride (TiCl4) under hydrogen atmosphere using catalysts such as nickel (Ni), ammonium chloride (NH4Cl) and calcium fluoride (CaF2). The experiment was performed by design of experiment (DOE). The parameters involved were reaction temperature (300 to 400 oC), reaction time (60 to 120 minutes) and molar ratio of Ni to NH4Cl
(0.1 to 0.3) while the responses were percentage of weight gain and degree of dehydriding. Various characterization method had been carried out such as X-Ray Diffraction (XRD), Field Emission Scanning Electron Microscopy (FESEM),Energy Dispersive X-Ray Spectroscopy (EDS), Fourier-transform infrared spectroscopy (FTIR), CHNS elemental analysis and Inductively Coupled Plasma Optical Emission Spectrometry (ICP-OES). From the experimental results, the high percentage of weight gain of 17 % was achieved at the reaction temperature of 400 oC, 60 minutes of
reaction time and molar ratio of Ni to NH4Cl of 0.5 while highest degree of dehydriding of 79.85% was obtained when reaction temperature was 300 oC, reaction time was 120
minutes and molar ratio of Ni to NH4Cl was 1.5. The DOE analysis showed that reaction time was the most significant parameter, followed by reaction temperature and molar ratio
of Ni to NH4Cl. The main compound formed after the reaction was magnesium nickel instead of titanium hydride because the amount of the nickel catalyst used was large while the
amount of titanium tetrachloride gas flow inside the tube furnace was too little. Besides, the existence of reverse reaction and high reaction temperature caused the desorption of magnesium hydride by nickel under hydrogen atmosphere, forming magnesium nickel. From the simulation results, the isothermal and non-isothermal Shrinking Core Model (SCM) were used to study the reaction. Both isothermal and non-isothermal shrinking core model showed similar trend and significant closeness to the experimental result within reaction time of 60 minutes. |
| first_indexed | 2025-11-15T18:34:21Z |
| format | Monograph |
| id | usm-52997 |
| institution | Universiti Sains Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T18:34:21Z |
| publishDate | 2018 |
| publisher | Universiti Sains Malaysia |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | usm-529972022-06-22T07:55:21Z http://eprints.usm.my/52997/ Effect Of Catalysts On The Formation Of Titanium Hydride Under Hydrogen Atmopshere Wong, Jia Ying T Technology TN Mining Engineering. Metallurgy The research objective is to produce titanium hydride (TiH2) from the reaction between magnesium Hydride (MgH2) and titanium tetrachloride (TiCl4) under hydrogen atmosphere using catalysts such as nickel (Ni), ammonium chloride (NH4Cl) and calcium fluoride (CaF2). The experiment was performed by design of experiment (DOE). The parameters involved were reaction temperature (300 to 400 oC), reaction time (60 to 120 minutes) and molar ratio of Ni to NH4Cl (0.1 to 0.3) while the responses were percentage of weight gain and degree of dehydriding. Various characterization method had been carried out such as X-Ray Diffraction (XRD), Field Emission Scanning Electron Microscopy (FESEM),Energy Dispersive X-Ray Spectroscopy (EDS), Fourier-transform infrared spectroscopy (FTIR), CHNS elemental analysis and Inductively Coupled Plasma Optical Emission Spectrometry (ICP-OES). From the experimental results, the high percentage of weight gain of 17 % was achieved at the reaction temperature of 400 oC, 60 minutes of reaction time and molar ratio of Ni to NH4Cl of 0.5 while highest degree of dehydriding of 79.85% was obtained when reaction temperature was 300 oC, reaction time was 120 minutes and molar ratio of Ni to NH4Cl was 1.5. The DOE analysis showed that reaction time was the most significant parameter, followed by reaction temperature and molar ratio of Ni to NH4Cl. The main compound formed after the reaction was magnesium nickel instead of titanium hydride because the amount of the nickel catalyst used was large while the amount of titanium tetrachloride gas flow inside the tube furnace was too little. Besides, the existence of reverse reaction and high reaction temperature caused the desorption of magnesium hydride by nickel under hydrogen atmosphere, forming magnesium nickel. From the simulation results, the isothermal and non-isothermal Shrinking Core Model (SCM) were used to study the reaction. Both isothermal and non-isothermal shrinking core model showed similar trend and significant closeness to the experimental result within reaction time of 60 minutes. Universiti Sains Malaysia 2018-06-25 Monograph NonPeerReviewed application/pdf en http://eprints.usm.my/52997/1/Effect%20Of%20Catalysts%20On%20The%20Formation%20Of%20Titanium%20Hydride%20Under%20Hydrogen%20Atmopshere_Wong%20Jia%20Ying_B1_2018.pdf Wong, Jia Ying (2018) Effect Of Catalysts On The Formation Of Titanium Hydride Under Hydrogen Atmopshere. Project Report. Universiti Sains Malaysia, Pusat Pengajian Kejuruteraan Bahan dan Sumber Mineral. (Submitted) |
| spellingShingle | T Technology TN Mining Engineering. Metallurgy Wong, Jia Ying Effect Of Catalysts On The Formation Of Titanium Hydride Under Hydrogen Atmopshere |
| title | Effect Of Catalysts On The Formation Of Titanium Hydride Under Hydrogen Atmopshere |
| title_full | Effect Of Catalysts On The Formation Of Titanium Hydride Under Hydrogen Atmopshere |
| title_fullStr | Effect Of Catalysts On The Formation Of Titanium Hydride Under Hydrogen Atmopshere |
| title_full_unstemmed | Effect Of Catalysts On The Formation Of Titanium Hydride Under Hydrogen Atmopshere |
| title_short | Effect Of Catalysts On The Formation Of Titanium Hydride Under Hydrogen Atmopshere |
| title_sort | effect of catalysts on the formation of titanium hydride under hydrogen atmopshere |
| topic | T Technology TN Mining Engineering. Metallurgy |
| url | http://eprints.usm.my/52997/ http://eprints.usm.my/52997/1/Effect%20Of%20Catalysts%20On%20The%20Formation%20Of%20Titanium%20Hydride%20Under%20Hydrogen%20Atmopshere_Wong%20Jia%20Ying_B1_2018.pdf |