Optimizing nano TiO₂ assisted decoloration process for industrial date syrup utilizing response surface methodology

Abstract

Titanium dioxide nanoparticle has been proposed to be capable of presenting new consequences in field of date syrup decoloration besides common industrial discoloring techniques like using carbon active. This nano structure was used as a photocatalyst in the presence of ultraviolet radiation to investigate the decrement in high color and turbidity of date syrup. Photocatalytic decoloration process was optimized using response surface methodology statistical design. The effect of TiO2 catalyst portion, date syrup concentration, dose of UV radiation (UV power multiple time of processing) on the qualitative characterization of the date syrup including color and reduced sugars content (glucose and fructose) was investigated. The optimum condition obtained by experimental design method was date syrup concentration 19.06°Brix, TiO2 content 3.81 g/l and dose 5,082.21 kJ. In this condition, 53% color, 5% glucose, and 3% fructose reduction was obtained. Practical applications Industrial date syrup is a common source of sugar which its consumption has been limited due to the presence of some coloring and turbidity agents. Thus Investigating new decoloration methods like nanotechnology which may reduce the colorants, as well as leaving less environmental pollution, seems necessary. The study offers using photocatalyst nanoparticle as a decolorant and obtaining the best decoloration condition by response surface methodology to get the least color and sugar loss in industrial date syrup.

Steam methane reforming on LaNiO 3 perovskite‐type oxide for syngas production, activity tests, and kinetic modeling

“…There is no difference in the moles numbers of reactants and products of WGS reaction (Equation ). Since; the equilibrium of WGS is not sensitive to the reaction pressure . Nevertheless, up to the equilibrium, pressure has a progressive effect on the WGS reaction .…”

“…Since; the equilibrium of WGS is not sensitive to the reaction pressure . Nevertheless, up to the equilibrium, pressure has a progressive effect on the WGS reaction . Comparing Figure A‐C, show that GHSV have little impact on CO 2 formation.…”

Methanol steam reforming over Co‐Cu‐Zn / γ‐Al 2 O 3 catalyst: Kinetic and RSM‐BBD modeling approaches

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“…The P-value lower than .05, higher F-value, the R 2 and the adjusted R 2 values closer to 1 describe the model significance. 43,44,51,52 Based on Table 4, P-value for methanol conversion, H 2 yield and CO yield responses were less than .0001, which present that the fitted models were highly statistical significant. Moreover, the values of R 2 and Adj R 2 of responses were close to 1, which described models could illustrate the relation between independent parameters and responses (see Table 4).…”

Combined steam and dry reforming of methanol over Fe‐Mn‐Cu / ZrO 2 catalyst to syngas formation: Study about kinetic and fuzzy model approaches

“…Moreover, pore volume and average pore size of Fe-Mn-Cu/ZrO 2 catalyst were lower compared to pure ZrO 2 , which would be because of the partial blockage of ZrO 2 pores during the sample synthesis. [66][67] F I G U R E 6 TGA curve for catalyst after the stability test methanol conversion was almost fixed during 40 hours initial on stream with 71.29%, and then started to decrease to 60.67% in the time period of 40 to 50 hours (see Figure 5A). Zhuang et al 68 observed that methanol conversion was approximately stable during 35 hours initial.…”