(Acetylacetonato-j2O,O0)carbonyl[tris(4- chlorophenyl)phosphane-jP]rhodium(I)
- Antonels, Nathan C., Meijboom, Reinout
- Authors: Antonels, Nathan C. , Meijboom, Reinout
- Date: 2012
- Subjects: Metal-organic compounds , Rhodium compounds , Carbonyl compounds
- Type: Article
- Identifier: uj:5993 , ISSN 1600-5368 , http://hdl.handle.net/10210/8626
- Description: Please refer to full text to view abstract
- Full Text:
- Authors: Antonels, Nathan C. , Meijboom, Reinout
- Date: 2012
- Subjects: Metal-organic compounds , Rhodium compounds , Carbonyl compounds
- Type: Article
- Identifier: uj:5993 , ISSN 1600-5368 , http://hdl.handle.net/10210/8626
- Description: Please refer to full text to view abstract
- Full Text:
(Acetylacetonato-k2O,O0)carbonyl- {dicyclohexyl[4-(dimethylamino)phenyl]- phosphane-kP}rhodium(I)
- Davis, Wade L., Meijboom, Reinout
- Authors: Davis, Wade L. , Meijboom, Reinout
- Date: 2011
- Subjects: Ligands , Acetylacetonate , Rhodium , Crystallography
- Type: Article
- Identifier: uj:5857 , ISSN 1600-5368 , http://hdl.handle.net/10210/7954
- Description: Please refer to full text to view abstract
- Full Text:
- Authors: Davis, Wade L. , Meijboom, Reinout
- Date: 2011
- Subjects: Ligands , Acetylacetonate , Rhodium , Crystallography
- Type: Article
- Identifier: uj:5857 , ISSN 1600-5368 , http://hdl.handle.net/10210/7954
- Description: Please refer to full text to view abstract
- Full Text:
(SP-4-2)-Chlorido{N-[2-(diphenylphosphanyl) benzylidene]benzylamine κ²P,N}(methyl)palladium(II)
- Chiririwa, Haleden, Meijboom, Reinout
- Authors: Chiririwa, Haleden , Meijboom, Reinout
- Date: 2011
- Subjects: Palladium complexes , Crystallography
- Type: Article
- Identifier: uj:5884 , ISSN 1600-5368 , http://hdl.handle.net/10210/8000
- Description: In the title Pd¹¹ complex, [Pd(C₃H)C₂₆l(CH₂₂NP)], the Pd¹¹ atom is coordinated in a slightly distorted square-planar geometry by the imino N and phosphane P atoms of the ligand, by one chloride ion and by a methyl ligand. The methyl group is trans to the N atom of the ligand.
- Full Text:
- Authors: Chiririwa, Haleden , Meijboom, Reinout
- Date: 2011
- Subjects: Palladium complexes , Crystallography
- Type: Article
- Identifier: uj:5884 , ISSN 1600-5368 , http://hdl.handle.net/10210/8000
- Description: In the title Pd¹¹ complex, [Pd(C₃H)C₂₆l(CH₂₂NP)], the Pd¹¹ atom is coordinated in a slightly distorted square-planar geometry by the imino N and phosphane P atoms of the ligand, by one chloride ion and by a methyl ligand. The methyl group is trans to the N atom of the ligand.
- Full Text:
1,4-Bis[(2-pyridylethyl)iminomethyl]- benzene
- Chiririwa, Haleden, Moss, John R., Su, Hong, Hendricks, Denver, Meijboom, Reinout
- Authors: Chiririwa, Haleden , Moss, John R. , Su, Hong , Hendricks, Denver , Meijboom, Reinout
- Date: 2011
- Subjects: X-ray crystallography , Crystallography , Tetradentate ligands
- Type: Article
- Identifier: uj:5872 , ISSN 1600-5368 , http://hdl.handle.net/10210/7970
- Description: Please refer to full text to view abstract
- Full Text:
- Authors: Chiririwa, Haleden , Moss, John R. , Su, Hong , Hendricks, Denver , Meijboom, Reinout
- Date: 2011
- Subjects: X-ray crystallography , Crystallography , Tetradentate ligands
- Type: Article
- Identifier: uj:5872 , ISSN 1600-5368 , http://hdl.handle.net/10210/7970
- Description: Please refer to full text to view abstract
- Full Text:
2-(Thiophen-2-yl)-N-(4-{(E)-[2-(thiophen- 2-yl)ethyl]iminomethyl}benzylidene)- ethanamine
- Chiririwa, Haleden, Meijboom, Reinout, Omondi, Bernard
- Authors: Chiririwa, Haleden , Meijboom, Reinout , Omondi, Bernard
- Date: 2011
- Subjects: X-ray crystallography , Crystallography , Tetradentate ligands
- Type: Article
- Identifier: uj:5873 , ISSN 1600-5368 , http://hdl.handle.net/10210/7971
- Description: Please refer to full text to view abstract
- Full Text:
- Authors: Chiririwa, Haleden , Meijboom, Reinout , Omondi, Bernard
- Date: 2011
- Subjects: X-ray crystallography , Crystallography , Tetradentate ligands
- Type: Article
- Identifier: uj:5873 , ISSN 1600-5368 , http://hdl.handle.net/10210/7971
- Description: Please refer to full text to view abstract
- Full Text:
Biodiesel production from soybean oil over TiO2 supported nano-ZnO
- Mukenga, Mbala, Muzenda, Edison, Jalama, Kalala, Meijboom, Reinout
- Authors: Mukenga, Mbala , Muzenda, Edison , Jalama, Kalala , Meijboom, Reinout
- Date: 2012
- Subjects: Soybean oil , Biodiesel
- Type: Article
- Identifier: uj:6288 , ISSN 2010-376X , http://hdl.handle.net/10210/9894
- Description: Please refer to full text to view abstract
- Full Text:
- Authors: Mukenga, Mbala , Muzenda, Edison , Jalama, Kalala , Meijboom, Reinout
- Date: 2012
- Subjects: Soybean oil , Biodiesel
- Type: Article
- Identifier: uj:6288 , ISSN 2010-376X , http://hdl.handle.net/10210/9894
- Description: Please refer to full text to view abstract
- Full Text:
Biodiesel production from waste vegetable oils over MgO/Al2O3 catalyst
- Sithole, Thembi, Jalama, Kalala, Meijboom, Reinout
- Authors: Sithole, Thembi , Jalama, Kalala , Meijboom, Reinout
- Date: 2014
- Subjects: Waste vegetable oils , Biodiesel fuels industry , Vegetable oils as fuel , Vegetable oils - Industrial applications
- Type: Article
- Identifier: uj:5029 , ISSN 1662-7482 , http://hdl.handle.net/10210/13549
- Description: MgO/Al2O3 catalysts with 10 and 20 wt.% MgO loadings have been prepared by incipient wetness impregnation method. A low-surface area alumina with small pore sizes was used as catalyst support to stabilise most of the MgO particles on the external surface area of the support. The prepared catalysts were subsequently tested in the conversion of a waste vegetable oil to biodiesel. The waste vegetable oil conversion was found to increase with the increase in reaction temperature, reaction time and MgO loading in the catalyst.
- Full Text:
- Authors: Sithole, Thembi , Jalama, Kalala , Meijboom, Reinout
- Date: 2014
- Subjects: Waste vegetable oils , Biodiesel fuels industry , Vegetable oils as fuel , Vegetable oils - Industrial applications
- Type: Article
- Identifier: uj:5029 , ISSN 1662-7482 , http://hdl.handle.net/10210/13549
- Description: MgO/Al2O3 catalysts with 10 and 20 wt.% MgO loadings have been prepared by incipient wetness impregnation method. A low-surface area alumina with small pore sizes was used as catalyst support to stabilise most of the MgO particles on the external surface area of the support. The prepared catalysts were subsequently tested in the conversion of a waste vegetable oil to biodiesel. The waste vegetable oil conversion was found to increase with the increase in reaction temperature, reaction time and MgO loading in the catalyst.
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Biodiesel production over nano-MgO supported on titania
- Mguni, Liberty L, Meijboom, Reinout, Jalama, Kalala
- Authors: Mguni, Liberty L , Meijboom, Reinout , Jalama, Kalala
- Date: 2012
- Subjects: Nano-MgO , Transesterification , Titania , Biodiesel
- Type: Article
- Identifier: uj:6058 , ISBN 2010-376X , http://hdl.handle.net/10210/10473
- Description: Please refer to full text to view abstract
- Full Text:
- Authors: Mguni, Liberty L , Meijboom, Reinout , Jalama, Kalala
- Date: 2012
- Subjects: Nano-MgO , Transesterification , Titania , Biodiesel
- Type: Article
- Identifier: uj:6058 , ISBN 2010-376X , http://hdl.handle.net/10210/10473
- Description: Please refer to full text to view abstract
- Full Text:
Biodiesel production over ZnO/TiO₂ catalyst : effect of co-solvent, temperature and reaction time
- Mahangani, Ndanganeni, Vunain, Ephraim, Meijboom, Reinout, Jalama, Kalala
- Authors: Mahangani, Ndanganeni , Vunain, Ephraim , Meijboom, Reinout , Jalama, Kalala
- Date: 2015-07-01
- Subjects: Biodiesel , Hexane , Waste vegetable oils
- Type: Article
- Identifier: uj:5127 , ISBN 9789881404701 , http://hdl.handle.net/10210/14090
- Description: The aim of this work was to produce biodiesel from waste vegetable oil over ZnO/TiO2 catalysts as well as investigating the effect of co-solvent (hexane), reaction temperature and time on waste vegetable oil conversion to biodiesel. Production of biodiesel from virgin oil is still a downfall in commercial processes due to high cost. Thus, the process of producing biodiesel from waste vegetable oil over a TiO2-supported ZnO catalyst was studied in the absence and the presence of hexane as co-solvent respectively. The conversion of waste vegetable oil was found to increase with temperature and reaction time. The highest conversion that has been achieved was 99.1% at a temperature of 200 °C after 15 min of reaction for the reaction using hexane as co-solvent. The use of hexane as co-solvent was found to increase the oil conversion at lower reaction temperature and no effect was observed at higher temperatures.
- Full Text:
- Authors: Mahangani, Ndanganeni , Vunain, Ephraim , Meijboom, Reinout , Jalama, Kalala
- Date: 2015-07-01
- Subjects: Biodiesel , Hexane , Waste vegetable oils
- Type: Article
- Identifier: uj:5127 , ISBN 9789881404701 , http://hdl.handle.net/10210/14090
- Description: The aim of this work was to produce biodiesel from waste vegetable oil over ZnO/TiO2 catalysts as well as investigating the effect of co-solvent (hexane), reaction temperature and time on waste vegetable oil conversion to biodiesel. Production of biodiesel from virgin oil is still a downfall in commercial processes due to high cost. Thus, the process of producing biodiesel from waste vegetable oil over a TiO2-supported ZnO catalyst was studied in the absence and the presence of hexane as co-solvent respectively. The conversion of waste vegetable oil was found to increase with temperature and reaction time. The highest conversion that has been achieved was 99.1% at a temperature of 200 °C after 15 min of reaction for the reaction using hexane as co-solvent. The use of hexane as co-solvent was found to increase the oil conversion at lower reaction temperature and no effect was observed at higher temperatures.
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Bis(acetonitrile-kN)dichlorido(h⁴-cycloocta- 1,5-diene)ruthenium(II) acetonitrile monosolvate
- Chiririwa, Haleden, Meijboom, Reinout, Owalude, Samson O., Eke, Uche B., Arderne, Charmaine
- Authors: Chiririwa, Haleden , Meijboom, Reinout , Owalude, Samson O. , Eke, Uche B. , Arderne, Charmaine
- Date: 2011
- Subjects: Ruthenium , Ligands , Crystallography
- Type: Article
- Identifier: uj:5881 , ISSN 1600-5368 , http://hdl.handle.net/10210/7997
- Description: Please refer to full text to view abstract
- Full Text:
- Authors: Chiririwa, Haleden , Meijboom, Reinout , Owalude, Samson O. , Eke, Uche B. , Arderne, Charmaine
- Date: 2011
- Subjects: Ruthenium , Ligands , Crystallography
- Type: Article
- Identifier: uj:5881 , ISSN 1600-5368 , http://hdl.handle.net/10210/7997
- Description: Please refer to full text to view abstract
- Full Text:
Bis(acrylonitrile-kN)dichlorido(h⁴-cycloocta- 1,5-diene)ruthenium(II)
- Chiririwa, Haleden, Meijboom, Reinout
- Authors: Chiririwa, Haleden , Meijboom, Reinout
- Date: 2011
- Subjects: Cycloocta-1,5-diene ligands , Metal ions , X-ray crystallography
- Type: Article
- Identifier: uj:5847 , ISSN 1600-5368 , http://hdl.handle.net/10210/7934
- Description: Please refer to full text to view abstract
- Full Text:
- Authors: Chiririwa, Haleden , Meijboom, Reinout
- Date: 2011
- Subjects: Cycloocta-1,5-diene ligands , Metal ions , X-ray crystallography
- Type: Article
- Identifier: uj:5847 , ISSN 1600-5368 , http://hdl.handle.net/10210/7934
- Description: Please refer to full text to view abstract
- Full Text:
Bis(dicyclohexylphenylphosphine)- silver(I) nitrate
- Burgoyne, Andrew R., Meijboom, Reinout, Muller, Alfred, Omondi, Bernard
- Authors: Burgoyne, Andrew R. , Meijboom, Reinout , Muller, Alfred , Omondi, Bernard
- Date: 2010
- Subjects: X-ray crystallography , Crystallography , Silver(I) salts , Phosphine complexes
- Type: Article
- Identifier: uj:5931 , ISSN 1600-5368 , http://hdl.handle.net/10210/8123
- Description: Please refer to full text to view abstract
- Full Text:
- Authors: Burgoyne, Andrew R. , Meijboom, Reinout , Muller, Alfred , Omondi, Bernard
- Date: 2010
- Subjects: X-ray crystallography , Crystallography , Silver(I) salts , Phosphine complexes
- Type: Article
- Identifier: uj:5931 , ISSN 1600-5368 , http://hdl.handle.net/10210/8123
- Description: Please refer to full text to view abstract
- Full Text:
Bis[dicyclohexyl(phenyl)phosphane-κP]- silver(I) perchlorate dichloromethane monosolvate
- Munyaneza, Apollinaire, Meijboom, Reinout, Omondi, Bernard
- Authors: Munyaneza, Apollinaire , Meijboom, Reinout , Omondi, Bernard
- Date: 2011
- Subjects: X-ray crystallography , Crystallography , Phosphane ligands , Hydrogen bonding
- Type: Article
- Identifier: uj:5952 , ISSN 1600-5368 , http://hdl.handle.net/10210/8158
- Description: Please refer to full text to view abstract
- Full Text:
- Authors: Munyaneza, Apollinaire , Meijboom, Reinout , Omondi, Bernard
- Date: 2011
- Subjects: X-ray crystallography , Crystallography , Phosphane ligands , Hydrogen bonding
- Type: Article
- Identifier: uj:5952 , ISSN 1600-5368 , http://hdl.handle.net/10210/8158
- Description: Please refer to full text to view abstract
- Full Text:
Carbonyl(8-hydroxyquinolinato)[tris(2,6-dimethylphenyl) phosphite]rhodium(I)
- Janse van Rensburg, J. Marthinus, Roodt, Andreas, Muller, Alfred, Meijboom, Reinout
- Authors: Janse van Rensburg, J. Marthinus , Roodt, Andreas , Muller, Alfred , Meijboom, Reinout
- Date: 2005
- Subjects: Rhodium–phosphine complexes , Ligands , Crystallography
- Type: Article
- Identifier: uj:5936 , ISSN 1600-5368 , http://hdl.handle.net/10210/8129
- Description: Please refer to full text to view abstract
- Full Text:
- Authors: Janse van Rensburg, J. Marthinus , Roodt, Andreas , Muller, Alfred , Meijboom, Reinout
- Date: 2005
- Subjects: Rhodium–phosphine complexes , Ligands , Crystallography
- Type: Article
- Identifier: uj:5936 , ISSN 1600-5368 , http://hdl.handle.net/10210/8129
- Description: Please refer to full text to view abstract
- Full Text:
Catalyst deactivation rate during hydrogenation of CO2 to longer chained hydrocarbons over 6 wt.% potassium-promoted Co/Al2O3 catalyst
- Khangale, Phathutshedzo R., Meijboom, Reinout, Jalama, Kalala
- Authors: Khangale, Phathutshedzo R. , Meijboom, Reinout , Jalama, Kalala
- Date: 2020
- Subjects: Co/Al2O3 catalyst , Potassium , CO2 hydrogenation
- Language: English
- Type: Article
- Identifier: http://hdl.handle.net/10210/470033 , uj:42209 , Citation: Khangale, P.R., Meijboom, R. & Jalama, K. 2020. Catalyst deactivation rate during hydrogenation of CO2 to longer chained hydrocarbons over 6 wt.% potassium-promoted Co/Al2O3 catalyst.
- Description: Abstract: Please refer to full text to view abstract.
- Full Text:
- Authors: Khangale, Phathutshedzo R. , Meijboom, Reinout , Jalama, Kalala
- Date: 2020
- Subjects: Co/Al2O3 catalyst , Potassium , CO2 hydrogenation
- Language: English
- Type: Article
- Identifier: http://hdl.handle.net/10210/470033 , uj:42209 , Citation: Khangale, P.R., Meijboom, R. & Jalama, K. 2020. Catalyst deactivation rate during hydrogenation of CO2 to longer chained hydrocarbons over 6 wt.% potassium-promoted Co/Al2O3 catalyst.
- Description: Abstract: Please refer to full text to view abstract.
- Full Text:
cis-Bis(benzyldiphenylphosphane-kP)- dichloridoplatinum(II) dichloromethane sesquisolvate
- Davis, Wade L., Meijboom, Reinout
- Authors: Davis, Wade L. , Meijboom, Reinout
- Date: 2011
- Subjects: Benzyl compounds , Ligands
- Type: Article
- Identifier: uj:5860 , ISSN 1600-5368 , http://hdl.handle.net/10210/7957
- Description: Please refer to full text to view abstract
- Full Text:
- Authors: Davis, Wade L. , Meijboom, Reinout
- Date: 2011
- Subjects: Benzyl compounds , Ligands
- Type: Article
- Identifier: uj:5860 , ISSN 1600-5368 , http://hdl.handle.net/10210/7957
- Description: Please refer to full text to view abstract
- Full Text:
cis-Dichloridobis[diphenyl(4-vinylphenyl) phosphane-kP]platinum(II)
- Ogutu, Hezron, Meijboom, Reinout
- Authors: Ogutu, Hezron , Meijboom, Reinout
- Date: 2011
- Subjects: X-ray crystallography , Crystallography , Transition metal complexes
- Type: Article
- Identifier: uj:5886 , ISSN 1600-5368 , http://hdl.handle.net/10210/8002
- Description: Transition metal complexes containing phosphine, arsine and stibine ligands are widely being investigated in various fields of organometallic chemistry (Spessard & Miessler, 1996). As part of a systematic investigation involving complexes with the general formula trans/cis-[MX2(L)2] (M = Pt or Pd; X = halogen, Me, Ph; L = group 15 donor ligand), the crystals of the title compound, were obtained. [PtCl2(L)2] (L = tertiary phosphine, arsine or stibine) complexes can conveniently be prepared by the substitution of 1,5-cyclooctadiene (COD) from [PtCl2(COD)]. The title compound, cis-[PtCl2{P(4—H2C=CHC6H4) Ph2}2], crystallizes in the triclinic spacegroup P1, with the Pt atom on a center of symmetry and each pair of equivalent ligands in a cis orientation. The geometry is a slightly distorted square planar and the Pt atom is slightly elevated out of the coordinating atom plane. The two P atoms are closer to each other but away from the two chloride atoms with angles of P1—Pt—P2 = 96.1 (4)° and Cl1—Pt—Cl2 = 87.7 (4)° whereas the P1—Pt—Cl1 is = 175.1 (4)° and that of P1—Pt—Cl2 being 89.6 (4)° The title compound compares well with other closely related PtII complexes from the literature containing two chloro and two tertiary phosphine ligands in a cis geometry. The title compound, containing Pt—Cl bond lengths of 2.3566 (9) and 2.3336 (9) Å and Pt—P bond distances of 2.2489 (9) and 2.2627 (9) Å, fits well into the typical range for complexes of this kind. Notably the title compound did not crystallise as a solvated complex; these type of PtII complexes have a tendency to crystallise as solvates (Meijboom & Omondi, 2011). Large thermal vibrations on the periphery of the molecule results in a badly defined C═C bond length. Disordered modelling resulted in an unstable refinement.
- Full Text:
- Authors: Ogutu, Hezron , Meijboom, Reinout
- Date: 2011
- Subjects: X-ray crystallography , Crystallography , Transition metal complexes
- Type: Article
- Identifier: uj:5886 , ISSN 1600-5368 , http://hdl.handle.net/10210/8002
- Description: Transition metal complexes containing phosphine, arsine and stibine ligands are widely being investigated in various fields of organometallic chemistry (Spessard & Miessler, 1996). As part of a systematic investigation involving complexes with the general formula trans/cis-[MX2(L)2] (M = Pt or Pd; X = halogen, Me, Ph; L = group 15 donor ligand), the crystals of the title compound, were obtained. [PtCl2(L)2] (L = tertiary phosphine, arsine or stibine) complexes can conveniently be prepared by the substitution of 1,5-cyclooctadiene (COD) from [PtCl2(COD)]. The title compound, cis-[PtCl2{P(4—H2C=CHC6H4) Ph2}2], crystallizes in the triclinic spacegroup P1, with the Pt atom on a center of symmetry and each pair of equivalent ligands in a cis orientation. The geometry is a slightly distorted square planar and the Pt atom is slightly elevated out of the coordinating atom plane. The two P atoms are closer to each other but away from the two chloride atoms with angles of P1—Pt—P2 = 96.1 (4)° and Cl1—Pt—Cl2 = 87.7 (4)° whereas the P1—Pt—Cl1 is = 175.1 (4)° and that of P1—Pt—Cl2 being 89.6 (4)° The title compound compares well with other closely related PtII complexes from the literature containing two chloro and two tertiary phosphine ligands in a cis geometry. The title compound, containing Pt—Cl bond lengths of 2.3566 (9) and 2.3336 (9) Å and Pt—P bond distances of 2.2489 (9) and 2.2627 (9) Å, fits well into the typical range for complexes of this kind. Notably the title compound did not crystallise as a solvated complex; these type of PtII complexes have a tendency to crystallise as solvates (Meijboom & Omondi, 2011). Large thermal vibrations on the periphery of the molecule results in a badly defined C═C bond length. Disordered modelling resulted in an unstable refinement.
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cis-Dichloridobis{[4-(dimethylamino)- phenyl]diphenylphosphane-ĸP}-platinum(II) ethyl acetate monosolvate
- Muller, Alfred, Meijboom, Reinout
- Authors: Muller, Alfred , Meijboom, Reinout
- Date: 2011-09
- Subjects: Transition metal complexes , Organometallic chemistry
- Type: Article
- Identifier: uj:5829 , ISSN 1600-5368 , http://hdl.handle.net/10210/7846
- Description: Please refer to full text to view abstract
- Full Text:
- Authors: Muller, Alfred , Meijboom, Reinout
- Date: 2011-09
- Subjects: Transition metal complexes , Organometallic chemistry
- Type: Article
- Identifier: uj:5829 , ISSN 1600-5368 , http://hdl.handle.net/10210/7846
- Description: Please refer to full text to view abstract
- Full Text:
CO2 hydrogenation to liquid hydrocarbons via modified Fi scher Tropsch over alumina supported cobalt catalyst s : effect of operating temperature, pressure and potassium loading
- Khangale, Phathutshedzo R., Meijboom, Reinout, Jalama, Kalala
- Authors: Khangale, Phathutshedzo R. , Meijboom, Reinout , Jalama, Kalala
- Date: 2020
- Subjects: CO2 hydrogenation; , Potassium , Temperature
- Language: English
- Type: Article
- Identifier: http://hdl.handle.net/10210/435807 , uj:37781 , Citation: Khangale, P.R., Meijboom, R. & Jalama, K. 2020. CO2 hydrogenation to liquid hydrocarbons via modified Fi scher Tropsch over alumina supported cobalt catalyst s : effect of operating temperature, pressure and potassium loading.
- Description: Abstract: The effect of promoting 15%Co/Al2O3 catalyst with potassium on CO2 hydrogenation to longer-chain hydrocarbons was investigated. The catalysts used in this study were synthesized using an incipient wetness impregnation of the support with nitrate solutions. All catalysts were supported on γ-alumina and promoted with potassium (0 – 8%). The synthesized catalysts were characterized by XRD, BET, XPS, TPR and CO2-TPD analyses. The catalysts were evaluated for CO2 hydrogenation using a fixed-bed tube reactor. The CO2 conversion was found to increase with both the reaction temperature and pressure. The TPR data revealed that potassium limited the reduction of the catalyst, decreased the selectivity to methane and increased the selectivity to C2+ hydrocarbons. The maximum C2+ yield of 10.2%, with CO2 conversion of 42.3%, was obtained when 6 wt.% of potassium was added to the catalyst. It is believed that during the CO2 hydrogenation process over the catalysts that were promoted with potassium, CO2 is first converted to CO via reverse–water–gas–shift reaction, followed by subsequent hydrogenation of CO to hydrocarbons.
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- Authors: Khangale, Phathutshedzo R. , Meijboom, Reinout , Jalama, Kalala
- Date: 2020
- Subjects: CO2 hydrogenation; , Potassium , Temperature
- Language: English
- Type: Article
- Identifier: http://hdl.handle.net/10210/435807 , uj:37781 , Citation: Khangale, P.R., Meijboom, R. & Jalama, K. 2020. CO2 hydrogenation to liquid hydrocarbons via modified Fi scher Tropsch over alumina supported cobalt catalyst s : effect of operating temperature, pressure and potassium loading.
- Description: Abstract: The effect of promoting 15%Co/Al2O3 catalyst with potassium on CO2 hydrogenation to longer-chain hydrocarbons was investigated. The catalysts used in this study were synthesized using an incipient wetness impregnation of the support with nitrate solutions. All catalysts were supported on γ-alumina and promoted with potassium (0 – 8%). The synthesized catalysts were characterized by XRD, BET, XPS, TPR and CO2-TPD analyses. The catalysts were evaluated for CO2 hydrogenation using a fixed-bed tube reactor. The CO2 conversion was found to increase with both the reaction temperature and pressure. The TPR data revealed that potassium limited the reduction of the catalyst, decreased the selectivity to methane and increased the selectivity to C2+ hydrocarbons. The maximum C2+ yield of 10.2%, with CO2 conversion of 42.3%, was obtained when 6 wt.% of potassium was added to the catalyst. It is believed that during the CO2 hydrogenation process over the catalysts that were promoted with potassium, CO2 is first converted to CO via reverse–water–gas–shift reaction, followed by subsequent hydrogenation of CO to hydrocarbons.
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Crystal structure of methyl-2-methyl-4-(2-oxo-2- phenylethyl)-5-phenyl-1H-pyrrole-3-carboxylate, C21H19NO3
- Naganagowda, Gadada, Mahlaka, Thabo Joel, Meijboom, Reinout
- Authors: Naganagowda, Gadada , Mahlaka, Thabo Joel , Meijboom, Reinout
- Date: 2016
- Language: English
- Type: Articles
- Identifier: http://hdl.handle.net/10210/241862 , uj:24933 , Citation: Naganagowda, G., Mahlaka, T.J. & Meijboom, R. 2016. Crystal structure of methyl-2-methyl-4-(2-oxo-2- phenylethyl)-5-phenyl-1H-pyrrole-3-carboxylate, C21H19NO3.
- Description: Abstract: Please refer to full text to view abstract
- Full Text:
- Authors: Naganagowda, Gadada , Mahlaka, Thabo Joel , Meijboom, Reinout
- Date: 2016
- Language: English
- Type: Articles
- Identifier: http://hdl.handle.net/10210/241862 , uj:24933 , Citation: Naganagowda, G., Mahlaka, T.J. & Meijboom, R. 2016. Crystal structure of methyl-2-methyl-4-(2-oxo-2- phenylethyl)-5-phenyl-1H-pyrrole-3-carboxylate, C21H19NO3.
- Description: Abstract: Please refer to full text to view abstract
- Full Text: