Catalyst Calcination Temperature Research Articles

Production of syngas from carbon dioxide reforming of methane by using LaNixFe1−xO3 perovskite type catalysts

A series of bulk and supported LaNixFe1-xO3 catalysts were synthesized, characterized and studied for dry reforming of methane (DRM) reaction. The catalysts were synthesized using sol-gel, incipient wetness impregnation (IWI) and co-precipitation methods. The catalysts were characterized by BET, XRD, FE-SEM, H2-TPR, and FTIR spectroscopy. A specific type of perovskite phase was obtained while changing the ratio of Ni to Fe for the synthesis of LaNixFe1-xO3 perovskite catalyst. The addition of supports increased the dispersion of perovskite phase, surface area and pore volume of the bulk perovskite catalysts. The support silica destroyed the perovskite features of the catalysts at higher calcinations temperature. The most active catalyst was found to be 40LaNi0.75Fe0.25O3/SiO2 calcined at 973 K for the DRM reaction with ratio of CH4:CO2:N2 as 1:1:2. The highest conversion corresponded to the catalyst calcined at 1073 K. However, the highest products yields and selectivity obtained while the catalyst was calcined at 773 K for 1 h. Thus, the choice of Ni to Fe ratio, support, method of synthesis and catalyst calcination temperature were crucial factors while synthesizing and designing a perovskite catalyst for dry reforming of methane reaction.

Green Synthesis of High Temperature Stable Anatase Titanium Dioxide Nanoparticles Using Gum Kondagogu: Characterization and Solar Driven Photocatalytic Degradation of Organic Dye.

The present study reports a green and sustainable method for the synthesis of titanium dioxide (TiO2) nanoparticles (NPs) from titanium oxysulfate solution using Kondagogu gum (Cochlospermum gossypium), a carbohydrate polymer, as the NPs formation agent. The synthesized TiO2 NPs were categorized by techniques such as X-Ray Diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy analysis, Raman spectroscopy, scanning electron microscope- Energy-dispersive X-ray spectroscopy (SEM-EDX), Transmission electron microscopy (TEM), High-resolution transmission electron microscopy (HR-TEM), UV-visible spectroscopy, Brunauer-Emmett-Teller (BET) surface area and particle size analysis. Additionally, the photocatalytic actions of TiO2 NPs were assessed with regard to their ability to degrade an organic dye (methylene blue) from aqueous solution in the presence of solar light. Various parameters affecting the photocatalytic activity of the TiO2 NPs were examined, including catalyst loading, reaction time, pH value and calcination temperature of the aforementioned particles. This green synthesis method involving TiO2 NPs explores the advantages of inexpensive and non-toxic precursors, the TiO2 NPs themselves exhibiting excellent photocatalytic activity against dye molecules.

Synthesis of novel ZnO/carbon xerogel composites: Effect of carbon content and calcination temperature on their structural and photocatalytic properties

This paper reports the development of new ZnO/carbon xerogel composites (XZn w) for photocatalytic applications. The use of black wattle tannin as a precursor to the carbon xerogel aimed at reducing costs and environmental impacts. The composites were characterized by diffuse reflectance spectroscopy (DRS), BET surface area, scanning electron microscopy (FEG-SEM), X-ray photoelectron spectroscopy (XPS), energy dispersive spectroscopy (EDS), infrared spectroscopy (IR), and X-ray diffraction (XRD). The photocatalytic performance of the materials was evaluated in the decomposition process of methylene blue, a known toxic pollutant. The impacts of the catalyst dosage and calcination temperature on the photocatalytic process were also examined systematically. The X-ray profiles of the XZn w evidenced the existence of the hexagonal structure of the zinc oxide (wurtzite) in the composites. The XPS and XRD analyses confirmed the incorporation of carbon in the zinc oxide crystalline structure. The higher carbon content resulted in a larger surface area. All composites presented the ability to absorb radiation in less energetic wavelengths, contrary to pure zinc oxide that only absorbs radiation of wavelengths below 420 nm. The optimal dosage and calcination temperature were found to be 0.2 g L−1 and 300 °C. All the developed composites displayed significant photocatalytic activities in the decomposition of methylene blue under both visible and solar light. The composites had superior photocatalytic efficiency under visible light when compared to pure zinc oxide. The XZn 0.5 presented the best degradation efficiency under visible radiation. All materials presented similar photocatalytic responses under solar light, evidencing the synergy between the carbon xerogel and the zinc oxide. The photocatalytic mechanism was evaluated by trapping experiments to be mainly controlled by the electron vacancies that are generated during the photoexcitation of the composites.

Utilization of cacao peel waste to K2O heterogeneous catalyst in biodiesel synthesis by waste cooking oil: effect of catalyst calcination temperature

Calcination is one way to take advantage of K2O content of cocoa pods husks potential as a catalyst in the production of biodiesel. The purpose of this research is the utilization of waste pod husks as heterogeneous catalysts in the manufacture of biodiesel from waste cooking oil. The catalyst preparation procedure of the cocoa shell ash is waste cocoa husk first cleaned by washing, so free from impurities such as mud and other substances. The peel then cut into small pieces and dried in the sun for two weeks to reduce the water content of the cocoa peel and smoothed by using ballmill. In this study, an analysis that is proximate analysis such as the water content of the sample and the catalyst, volatile matter, ash content, yield of ash, fixed carbon, pH and also do analysis of the pore structure of the catalyst by using analysis of SEM-EDS analysis and potassium (K2O) with AAS analysis. The best conditions are obtained the purity of 99.58% with a methyl ester methyl ester yield of 92.68% with a mole ratio of alcohol and the use of used cooking oil 12: 1, a reaction temperature of 65 °C, the amount of catalyst is 6% (w / w) which are calcined at a temperature of 650 °C and reaction time of 180 minutes. The results of the present study indicate that the use of cocoa peel and used cooking oil is a catalyst and cheap raw materials suitable in the manufacture of biodiesel.

Synthesis and Characterization of CaO-TiO2 for Transesterification of Vegetable Palm Oil

This study explores the potential of titanium oxide impregnated on calcium oxide (CaO-TiO2) as catalyst in transesterification of vegetable palm oil (VPO) to produce biodiesel. The biodiesel yield increased with catalyst calcination temperature and reaction time, and the usage of CaO-TiO2 led to higher biodiesel production when compared to reaction catalyzed by CaO. Biodiesel yield of 93.33% was recorded when CaO-TiO2 was used at optimized reaction conditions. Catalyst characterizations showed that addition of TiO2 to CaO improved the catalytic property by increasing the surface area and strength of basic sites, hence increased the catalytic performance of TiO2-CaO. This study demonstrates the potential of CaO-TiO2 to convert VPO into biodiesel, and the potential of the catalyst in conversion of waste cooking oil into renewable fuel will be studied.

Effects of Nickel Precursor and Calcination Temperature on the Performance of Ni/MgAl2O4 Catalysts for Syngas Production by CO2 Reforming of Coke Oven Gas

The CO2 reforming of coke oven gas (COG) to product syngas at 750°C over 10 wt% Ni loaded on spinel MgAl2O4 (10Ni/MA) catalyst supported different nickel precursors was researched, including nickel nitrate, nickel acetate, nickel chloride and nickel acetylacetonate. Moreover, the calcination temperature of catalysts was also studied to investigate the activity and stability. The catalysts were analyzed by XRD, BET, CO2-TPD, H2-TPH and TEM. It was observed that MA (calcined at 800°C) supported nickel nitrate has the largest surface area, the most uniform pore diameter and the ratio nickel species owned higher bounding strength with support was the best. In addition, the results showed that catalysts supported nickel nitrate demonstrated the highest catalytic activity in which the conversion of CH4 and CO2 were up to 81.4% and 94.5%, respectively, and the selectivity of H2 and CO were 71.3% and 88.8%, respectively.

Low-Temperature Pyrolysis–Catalysis Coupled System for Efficient Tetrachlorobenzene Removal: Condition Optimization and Decomposition Mechanism

The decomposition of tetrachlorobenzene (TeCB) emitted from simulated fly ash was studied in a low-temperature pyrolysis–catalysis coupled system. The influences of catalyst support, active component type, active phase-to-assistant ratio, vanadium loading, and catalyst calcination temperature on TeCB conversion were comprehensively investigated. The optimal catalyst composition and preparation conditions were determined through single-factor experiments. Moreover, the effects of reaction temperature, space velocity, and pollutant initial concentration on TeCB decomposition efficiency were explored by orthogonal experiments. The possible mechanism for PeCB decomposition over prepared V2O5–WO3/TiO2 catalysts was proposed based on reaction-byproduct composition and distribution. It is found that the TeCB decomposition efficiency is positively correlated with reaction temperature while being negatively correlated with gas hourly space velocity (GHSV) and TeCB initial concentration. GHSV has the most significant effect on TeCB decomposition, followed by reaction temperature and TeCB concentration. Under optimal conditions of space velocity of 600 h–1, reaction temperature of 350 °C, and TeCB initial concentration of 0.5 volume percent, the TeCB conversion can reach up to 94.1%. The key substeps of TeCB decomposition are aromatic pollutant adsorption, nucleophilic substitution, and intermediate electrophilic substitution. The TeCB molecules were first adsorbed on catalyst surface and then decomposed into low-chlorination aromatics and aromatic and aliphatic hydrocarbons as phenolates, benzoquinone, aldehydes, and carboxylic acids.

Effect of catalyst calcination temperature in the visible light photocatalytic oxidation of gaseous formaldehyde by multi-element doped titanium dioxide

The present study investigates the influence of calcination temperature on the properties and photoactivity of multi-element doped TiO2. The photocatalysts were prepared by incorporating silver (Ag), fluorine (F), nitrogen (N), and tungsten (W) into the TiO2 structure via the sol-gel method. Spectroscopic techniques were used to elucidate the correlation between the structural and optical properties of the doped photocatalyst and its photoactivity. XRD results showed that the mean crystallite size increased for undoped photocatalysts and decreased for the doped photocatalysts when calcination was done at higher temperatures. UV-Vis spectra showed that the absorption cut-off wavelength shifted towards the visible light region for the as-synthesized photocatalysts and band gap narrowing was attributed to multi-element doping and calcination. FTIR spectra results showed the shifting of OH-bending absorption bands towards increasing wave numbers. The activity of the photocatalysts was evaluated in terms of gaseous formaldehyde removal under visible light irradiation. The highest photocatalytic removal of gaseous formaldehyde was found at 88%. The study confirms the effectiveness of multi-element doped TiO2 to remove gaseous formaldehyde in air by visible light photocatalysis and the results have a lot of potential to extend the application to other organic air contaminants.

Ce/kaolin clay as an active catalyst for fatty acid methyl esters production from cottonseed oil in a new integrated apparatus

Abstract An efficient solid acid catalyst (Ce/Kaolin clay) was prepared and investigated for transesterification of cottonseed oil to fatty acid methyl esters (FAME). The catalysts were characterized by XRD, BET, and NH3-TPD measurements. A new integrated apparatus for extraction and transesterification of cottonseed oil was developed. The effects of cerium loading, catalyst calcination temperature, methanol flow rate, reaction temperature, reaction time, and catalyst amount were also investigated. The results indicated that the Ce/Kaolin clay showed high catalytic activity under the calcination temperature of 700 oC and cerium loading of 0.05 g/g. The optimum transesterification reaction conditions were as follows: methanol flow rate 4.0 mL/min, reaction temperature 60 oC,reaction time 3 h, and catalyst amount 15 g. Under these conditions, the yield of FAME was up to 91%.The catalytic activity of Ce/Kaolin clay still remained high after 4 times of repeated use. The results indicated that the Ce/Kaolin clay catalysts had a good potential for use in the large-scale production of FAME.

Anchoring effect of Ni2+ in stabilizing reduced metallic particles for growing single-walled carbon nanotubes

The suitability of the NiMgO catalyst as a catalyst in chiral-selective growth of single-walled carbon nanotubes (SWNTs) by chemical vapor deposition has been assessed. It reveals that catalyst calcination temperature plays an important role in affecting the catalyst performances. Using CO as the carbon precursor and a chemical vapor deposition reaction temperature of 600 °C, NiMgO pre-calcined at 600 °C demonstrates the best performances in catalyzing the growth of SWNTs with predominant (6, 5) species. Systematic characterizations on catalysts calcinated at different temperatures indicate that Ni2+ ions diffuse towards the interior of MgO matrix upon annealing. DFT-based calculations reveal that the binding energy between Ni2+ and adjacent Ni(0) is larger than that between Mg2+ and Ni (0), while Ni2+ situated deep inside MgO has weak interactions with surface Ni atoms. This work highlights the importance of subsurface Ni2+ in anchoring reduced surface Ni atom, which inhibits the aggregation of Ni particles and therefore, facilitates the growth of SWNTs with a narrow chirality distribution.

SBA-15 supported molybdenum oxide towards efficient catalytic oxidative desulfurization: effect of calcination temperature of catalysts

ABSTRACTThe phosphomolybdic acid has been successfully supported on functionalized ionic liquid (IL) modified mesoporous silica SBA-15. Subsequently, the obtained products were calcined at different temperatures. The oxidative desulfurization of model fuel containing benzothiophene, dibenzothiophene or 4,6-dimethyldibenzothiophene has been carried out with HPMo-IL/SBA-15 calcined at various temperatures. Based on desulfurization rate and cost, the optimum calcination temperature of HPMo-IL/SBA-15 catalyst was around 400 °C. More molybdenum oxide active sites were shown by the decomposition of the IL at the higher temperature, which caused better desulfurization performance.

Effect of calcination temperature on the application of sodium zirconate solid base catalyst for biodiesel production from Jatropha curcas oil

ABSTRACTInfluence of catalyst calcination temperature on the catalyst characteristics and catalytic transesterification of Jatropha curcas oil for biodiesel production was studied by using sodium zirconate (Na2ZrO3) solid base catalyst. Na2ZrO3 catalysts were prepared by impregnation method followed by calcination at temperatures of 700, 800, and 900°C. The prepared catalysts were characterized by X-ray diffraction analysis, Fourier transform infrared spectroscopy, and field emission scanning electron microscopy. Important parameters influencing the catalytic activity and fatty acid methyl ester yield were investigated. It was found that the increase in calcination temperature showed marked increase in activity due to the increased porosity and presence of tetragonal zirconia. Investigation of the reusability of the catalysts showed that the catalytic activity was retained even after five cycles of reaction.

Mn based catalysts for driving high performance of HCN catalytic oxidation to N2 under micro-oxygen and low temperature conditions

In this work, a series of MnOx/TiO2-Al2O3 oxides synthesized via sol–gel method were evaluated for catalytic oxidation of HCN under micro-oxygen and low temperature conditions. The reaction temperature, oxygen concentration, Mn content, relative humidity and calcination temperature of catalysts were the five crucial factors that were determined during the study. 15wt% of MnOx/TiO2-Al2O3 performed excellently on HCN catalytic oxidation, and nearly 100% HCN conversion and 70% N2 yield were obtained at 200°C. The comparison of H2-TPR, BET, FTIR and XPS results from fresh and used catalysts revealed that both oxygen types, namely chemisorbed and lattice oxygen, as well as adsorbed water molecules and several chemical states of Mn, including Mn4+, Mn3+ and Mn2+, were the main active species on the catalyst’s surface.It was found that the occurrence of hydrolysis of HCN was accompanied by the HCN catalytic oxidation process. In HCN catalytic oxidation process, the catalytic hydrolysis of HCN that occurred could be ascribed to two sources of adsorbed water molecules: (i) the catalyst itself, which contained adsorbed water molecules; (ii) the re-adsorption of water molecules that produced by HCN oxidation reaction. The water vapor introduced had obvious inhibition to HCN conversion and N2 yield may be due to the competitive adsorption between water molecules and HCN.Based on XPS, FTIR results and early studies, HCN pre-reacted with water molecules from the catalyst’s surface to produce NH3 and CO. Both of these products were readily further oxidized to produce N2, H2O and CO2 under low temperatures, but they were oxidized to NO instead at high temperatures. Meanwhile, only a small amount of N2O as an undesirable by-product produced in this reaction process.

Experimental study on catalytic effect of biomass pyrolysis volatile over nickel catalyst supported by waste iron slag

Summary The study aims to analyze catalytic tar destruction, evaluate the activity of the Ni-based catalyst supported by waste iron slag, and obtain clean pyrolysis syngas. The effects of different nickel loadings, catalytic temperatures, and catalyst calcination temperatures on volatile were investigated in order to determine the optimal process condition. The analysis results showed that the iron slag Ni-based catalyst had a relatively low specific surface area. However, it showed an excellent resistance performance to the coke deposition and displayed the high tar removal ability. Moreover, the tar conversion and the yield of syngas were significantly affected by nickel loadings. When the nickel loading reached 3%, the tar dew point was decreased by nearly 100 °C and the tar conversion reached 94.84%. The favorable reaction temperature was about 800 °C based on the consideration of energy consumption and the catalytic performance. Calcination temperature affected tar yield and syngas yield. The application of iron slag in nickel catalyst realized the reutilization of waste materials, indicating significant practical values. Copyright © 2017 John Wiley & Sons, Ltd.

Hydrotalcite as Active and Selective Catalyst for Synthesis of Dehydrozingerone from Vanillin and Acetone: Effect of Catalyst Composition and Calcination Temperature on Activity and Selectivity

Background: Dehydrozingerone is a biosynthetic intermediate and structural analog of curcumin. It is a flavoring ingredient and has antioxidant and antimutagenic properties. Dehydrozingerone can be efficiently synthesized from vanillin and acetone by cross-aldol (or Claisen-Schmidt) condensation using heterogeneous base catalysts. Vanillin can be sourced from the valorization of biomass. Green chemistry aspects such as 100 % atom economy and low E factor are very important in any synthesis which could be achieved by use of heterogeneous catalysis. Keywords: Biomass, vanillin, hydrotalcite, dehydrozingerone, cross-aldol (or Claisen-Schmidt) condensation.

Production of syngas from pyrolysis of biomass using Fe/CaO catalysts: Effect of operating conditions on the process

This study aimed to further optimize the operating conditions to produce hydrogen-enriched syngas from the catalytic pyrolysis of biomass in a two-stage fixed-bed reaction system with the Fe/CaO catalyst derived from layered double hydroxides (LDHs) precursor. Specifically, the effects of catalyst calcination temperature and catalytic bed temperature on the composition and yield of syngas were investigated. Various characterization techniques such as XRD, SEM, BET, H2-TPR and CO2-TPD were employed to thoroughly characterize the Fe/CaO catalysts both before and after the catalytic reaction. It was found that the catalyst synthesized at a mild temperature of 600°C performed the best in producing hydrogen-enriched syngas, probably because of its uniform morphology, smaller particle size, superior reducibility and stronger CO2 absorption ability. In addition, higher temperature was found to benefit the syngas production due to the acceleration of reaction rate and promotion of secondary cracking and reforming reactions of heavy organic molecules with the maximum syngas yield of 63.0wt.% and H2 yield of 172mL/g biomass obtained at catalytic temperature of 800°C using Fe/CaO catalyst calcined at 600°C. Nevertheless, the H2/CO ratio was only at a suboptimal level of 0.99 because the decomposition of CaCO3 at higher catalytic temperature released CO2 and suppressed the water gas shift reaction to produce more H2.

Single-pot synthesis of Ti-SBA-15-NiMo hydrodesulfurization catalysts: Role of calcination temperature on dispersion and activity

A novel approach was systematically investigated for developing single-pot (SP) NiMo-supported Ti-SBA-15 catalysts for hydrodesulfurization (HDS). The technical challenge associated with the SP approach is the formation of crystalline NiMoO4, and this was avoided by reducing the calcination temperature of the oxide catalyst from 550°C to 300°C to form a highly dispersed and efficient HDS catalyst. The dispersion, textural properties, surface acidity, oxide reducibility, surface chemical and elemental compositions of developed catalysts were measured by XRD, Raman spectroscopy, N2-physisorption, and temperature-programmed techniques (TPR and TPD), X-ray photoelectron spectroscopy (XPS) and inductively coupled plasma (ICP). Scanning electron microscopy (SEM), and high resolution transmission electron microscopy (HRTEM) were employed as additional characterization methods to investigate the catalysts’ morphology and microstructure. Catalyst performance was evaluated in a batch autoclave reactor using a simulated feed containing 2500 parts per million sulfur (ppm-S) (dibenzothiophene, DBT) in dodecane. The catalyst prepared by the SP approach and calcined at a lower temperature (300°C) showed significantly improved HDS activity and direct desulfurization selectivity compared to the catalyst prepared by the conventional impregnation approach. An increase in the calcination temperature to 550°C, however, resulted in a decrease in the HDS activity of the catalysts prepared by both methods. The dispersion, surface acidity, and textural properties of the catalysts prepared using the SP method combine to improve the catalytic efficiency. The use of a complexing agent to aid the dispersion of the active phase was unnecessary when the SP method was used for catalyst preparation.

Effect of Calcination Temperature and Time on Waste Heterogeneous Catalysts for Biodiesel Production

This paper studies the effect of calcination time and temperature of mixed waste catalyst for optimization of FAME yield. Fish bone and mixture of coconut waste and eggshells were used to catalyzed the transesterification process. The parameter was tested on different calcination condition and the result shows that the optimum condition was achieved at condition 800 °C, 2 hours was 80.3 wt% of FAME yield for mixed coconut waste and eggshells and 85 wt% were obtained at 900 °C for fish bone catalyst at 225 rpm, 12:1 methanol to oil ratio and amount of catalyst, 3wt%. It can be concluded that waste heterogeneous catalyst exhibits as a cheaper substitute to the homogenous catalyst.

In-situ incorporation of binder during sol-gel preparation of Pd-based sulfated zirconia for reduction of nitrogen oxides under lean-burn conditions: Effect on activity and wash-coating characteristics

We have developed a dual-catalyst aftertreatment system for reducing nitrogen oxides (NOx) in the exhaust stream of natural gas-fired lean-burn engines by utilizing the unburned hydrocarbons present in the engine exhaust. The dual-catalyst bed consists of a physical mixture of a reduction catalyst (Pd/SZ) and an oxidation catalyst (Co/CeO2). In order to make this dual-catalyst system viable for practical use in the real aftertreatment units, it is necessary to develop a catalytically active washcoat for loading it onto cordierite monolith cores. To be able to handle large throughputs of gases typical of aftertreatment units, irreversible loss of activity due to separation of the wash-coat from the monolith walls can be reduced by adding binders to improve the adhesive properties of the wash-coat. However, addition of such binders may affect the catalytic activity of the resulting dual-catalyst bed. In our study, we have incorporated binders such as alumina, boehmite, bentonite or silica to the Pd/SZ catalyst using a novel technique in which the binders were added in situ during the sol-gel synthesis rather than the conventional method of adding binders (ex-situ) in catalyst slurry. Surface area analysis, X-ray diffraction (XRD) and diffuse reflectance Fourier transform spectroscopy (DRIFTS) with pyridine show that in-situ addition of binder affects the textural properties, crystal phase of zirconia and the acidic properties of the resulting Pd/SZ catalyst respectively. Electron Paramagnetic Resonance (EPR) indicated the presence of Pd+, Pd3+ and Zr3+ species in the binder-free and in situ alumina-incorporated Pd/SZ catalysts. Furthermore, steady-state activity tests on the modified dual-catalyst bed with the alumina-incorporated Pd/SZ exhibit the best performance amongst the other binder-incorporated catalysts in the dual-catalyst bed. In-situ incorporation of binder during sol-gel synthesis yielded catalysts with far superior catalytic activity for NOx reduction than conventional ex-situ binder addition to the catalyst slurry for wash-coating. Time-on-stream experiments show that the alumina-incorporated Pd/SZ catalyst maintains the hydrothermal stability of the binder-free Pd/SZ in the mixed bed. Several parameters such as pH of the binder-incorporated catalyst slurry and calcination temperature of the wash-coat have also been optimized to develop a catalytically active wash-coat and its adhesivity and uniformity were tested using ultrasonication, cyclic thermal shock and SEM imaging.

Effect of Calcination Temperature on Performance of Photocatalytic Reactor System for Seawater Pretreatment

Conservative desalination technology including distillation requires high energy and cost to operate. Hence, pretreatment process can be done prior to desalination to overcome energy demand and cost reduction. Objective of this research is to study the effect of calcination temperature of hybrid catalyst in photocatalytic reactor system in the seawater desalination, i.e. salt removal in the seawater. The catalyst was synthesized via wet impregnation method with 1:1 weight ratio of TiO2 and activated oil palm fiber ash (Ti:Ash). The catalyst was calcined at different temperature, i.e. 500 oC and 800 oC. The study was carried out in a one liter Borosilicate photoreactor equipped with mercury light of 365 nanometers for two hours with 400 rpm mixing and catalyst to seawater sample weight ratio of 1:400. The Chemical Oxygen Demand (COD), pH, dissolved oxygen (DO), turbidity and conductivity of the seawater were analyzed prior and after the testing. The fresh and spent catalysts were characterized via X-Ray Diffractogram (XRD and Nitrogen physisorption analysis. The calcination temperature significantly influenced the adsorption behaviour and photocatalytic activity. However, Ti:Ash which calcined at 800 oC has less photocatalytic activity. It might be because the surface of fiber ash was sintered after calcined at high temperature. The Ti:Ash catalyst that calcined at 500 oC was found to be the most effective catalyst in the desalination of seawater by reducing the salt concentration of more than 9 % compared to Ti:Ash calcined at 800 oC. It can be concluded that catalyst calcination at 500 °C has better character, performance and economically feasible catalyst for seawater desalination.