Influence Of Reaction Parameters Research Articles

The Treatment of Antibiotic Excess Sludge via Catalytic Wet Oxidation with Cu-Ce/γ-Al2O3 and the Production of a Carbon Source

In the present study, the effectiveness of catalytic wet oxidation triggered by using Cu-Ce/γ-Al2O3 to degrade antibiotic excess sludge was investigated, during which some small molecule carboxylic acids were produced, which are valuable in biological wastewater treatment as an organic carbon source. The influence of reaction parameters on the degradation efficiency was explored through single-factor and orthogonal experiments, including catalyst amount, reaction temperature and time, and oxygen supply amount. The results illustrated that the treatment system can achieve 81.2% COD and 93.8% VSS removal rates under optimized reaction conditions. Carboxylic acids produced after the sludge degradation mainly included acetic acid, propanoic acid, etc. The results of wastewater biological treatment experiments exhibited that the degraded solution after catalytic wet oxidation has potential to be used as a carbon source to meet the demand of biological treatment, which helps the removal of COD and TN. This work confirms the effectiveness of catalyst for enhancing antibiotic excess sludge treatment, which provided a new idea for the rational disposal of antibiotic excess sludge.

Influences of reaction parameters and complexation pretreatments on the distribution of phosphorus during hydrothermal carbonization of dewatered sewage sludge

This study investigated the effects of reaction parameters and pretreatments with complexing agents, namely ethylenediaminetetraacetic acid (EDTA), glutamate diacetic acid (GLDA), and citric acid (CA), on the phosphorus contents and forms in the sludge hydrothermal carbonization products. The results showed that reaction temperature had the greatest effect on the distribution and forms of phosphorus in liquid and solid products. High reaction temperatures inhibited the transfer of phosphorus from the solid phase to the liquid phase. Indeed, the proportions of phosphorus in the liquid phases only accounted for 3.56 % at reaction temperature and time of 160 °C and 60 min, respectively. However, this proportion increased to 16.32, 12.62, and 13.15 % following complexation pretreatments with EDTA, GLDA, and CA at 0.1 mol/L, respectively. In addition, the complexation pretreatments enhanced the transfer of phosphorus from the solid phase to the liquid phase. The total phosphorus contents in the liquid phase (TPL) reached 896.46 mg/L. The finding can be explained by the binding of the complexing agents with metal ions, such as Mg, Ca, Al, and Fe, transferring phosphorus originally bound to these metal ions to the liquid phase. In addition, the results demonstrated the effectiveness of the magnesium ammonium phosphate (MAP) crystallization method for recovering phosphorus from the EDTA-pretreated liquid product. X-ray diffraction (XRD) and scanning electron microscopy-energy dispersive spectroscopy (SEM-EDS) analyses showed high purity and crystallinity of the obtained struvite to some extent.

Influence of reaction parameters on biofuels derived from solvothermal liquefaction of Citrus limetta fruit wastes

Citrus limetta or sweet lime is a widely consumed fruit worldwide. The wastes generated from their processing are enormous and are discarded without any value-addition. Biomass liquefaction in hydrogen-donor solvent is an effective thermochemical conversion technique to produce value added products such as biocrude and biochar from wet biomasses directly. Thus, liquefaction studies of Citrus limetta peel and pulp were conducted using solvent methanol at temperatures of 240 °C–280 °C, 30 min residence time as well as 1:2, 1:3 and 1:4 ratios of biomass to solvent. The impact of temperature as well as biomass to solvent ratio on yield of biocrude and biochar were investigated herein. Biocrude produced from Citrus limetta peel at 240 °C and 1:3 ratio of biomass to solvent is maximum (12.5 wt. %). At reaction parameters of 280 °C and 1:4 ratio of biomass to solvent, biocrude from Citrus limetta pulp showed higher heating value of 27.18 MJ kg−1 which was the maximum obtained in this study. The gas-chromatography mass-spectrometry (GC-MS) indicated presence of alcohols, phenols, alkanes, ketones, ethers, esters and fatty acid methyl esters as major compounds. The characteristics and energy content of biochar demonstrated their potentiality for bioenergy applications.

Influence of Reaction Parameters on Nanogold-Catalyzed Glucose and Xylose Oxidation: A Joint Experimental and DFT Study

Influence of Reaction Parameters on Nanogold-Catalyzed Glucose and Xylose Oxidation: A Joint Experimental and DFT Study

Aqueous‐phase reforming of model compounds of wet biomass to hydrogen on alumina‐supported metal catalysts

AbstractCatalytic aqueous‐phase reforming (APR) of wet biomass such as microalgae and activated sludge is a potential technique for the production of H2‐rich gaseous products. In the present work, model compounds such as ethylene glycol, xylose and alanine were selected as representatives of the polyols, carbohydrates and proteins in wet biomass. APR trials were performed in a stirred batch reactor using commercial Pt/Al2O3 and Ru/Al2O3 catalysts. The reforming reactions were investigated at different conditions: temperature (T), 498 to 518 K, feed concentration, 1 to 5 wt. %, catalyst loading (ω), 2 to 6 kg/m3, and reaction time (t), 1 to 6 h. The commercial Pt/Al2O3 catalyst exhibited higher reforming activity. The influence of reaction parameters on turnover frequency (TOFH₂), hydrogen yield (Y‐H2) and carbon‐to‐gas conversion (C to G conversion) was studied. The values of TOFH₂ for Pt/Al2O3 were measured at T = 518 K, ω = 2 kg/m3 and t = 3 h using 1 wt% feed and these values were 19.2, 4 and 6 1/min for ethylene glycol, xylose and alanine. The values of TOFH₂ over Ru/Al2O3 under identical conditions were: ethylene glycol–12.4, xylose–1.4 and alanine–5.4 1/min. The activation energies for H2 production from ethylene glycol, xylose and alanine over Pt/Al2O3 and Ru/Al2O3 catalysts were determined. APR of the mixture of model compounds was also studied over laboratory‐made Pt/Al2O3 and Ru/Al2O3 catalysts at the optimum reaction conditions. Thus, this work has provided crucial insights into the production of H2 from model compounds of wet biomass using Al2O3‐supported catalysts.

In situ transesterification of the catolé coconut (Syagrus Cearensis) utilizing experimental design by Taguchi method

This work proposes the optimization of biodiesel synthesis utilizing in situ transesterification, through experimental design by the Taguchi method. In this process, nine experiments were carried out and the influence of reaction parameters as catalyst mass, proportion of methanol in relation to oil content and temperature were statistically evaluated. The mass yield was analyzed as a response. The optimized condition was obtained through the reaction with 2 wt% of catalyst, ratio of methanol to oil 5:1 content and 60ºC. The experiment generated a yield of 66.17 wt%. In the experimental study, the evaluated parameters presented relevant p-value, with the catalyst rate being the factor that most impacted the synthesis yield. The synthesized biodiesel obtained from the confirmation experiment of the Taguchi modelling was characterized through the physical-chemical parameters. The material complies with international standards for biodiesel, highlighting the result of oxidative stability greater than 18 h, the combustion events in thermal analysis ranging from 224 to 258 ºC, and activation energy of 67.3 KJ.mol−1, justified by the profile of mostly saturated fatty acids demonstrated in the chromatography analysis. From nuclear magnetic resonance analysis, the synthesis proved to be effective to convert all the triglycerides extracted from the kernel into biodiesel, without the necessity of additional steps of oil extraction and purification. In this sense, an optimized reaction system allied to biodiesel with expressive quality makes catolé coconut a raw material with high commercial potential. The use of Taguchi design to obtain the best conditions for the reaction allowed for an easy interpretation of the results, providing good comprehension of the impacts of the reaction parameters in the synthesis.

Biodiesel production from cagaite seeds (Eugenia dysentericaDC) oil: An alternative for biofuel production

AbstractIn the present work, cagaite (Eugenia dysenterica DC.) seed oil was studied as a potential inedible raw material for biodiesel production. The oil was extracted using a Soxhlet extractor and the fatty acids acyl esters that make up biodiesel were obtained by alkaline transesterification using sodium hydroxide. The influence of reaction parameters was also evaluated: molar ratio, time, and amount of catalyst. The conversion of fatty acids into fatty acid methyl esters (FAME), which make up biodiesel, was calculated using Nuclear Magnetic Resonance Spectroscopy (1HNMR) spectra. In a 30 min reaction period, the molar ratio of oil to methanol was 1:4, resulting in a conversion of 63.57%. However, when the molar ratio was increased to 1:8, the conversion reached 81.74% during the same 30 min reaction period. After 60 min of reaction, additional increases in conversion were observed when molar ratios of 1:4, 1:6, and 1:8 were used. Under these conditions, the conversions achieved were 92.08%, 98.24%, and 98.78%, respectively. The physico‐chemical properties were evaluated and the results showed that cagaite seed oil biodiesel was similar to soybean biodiesel, which is the most commonly produced biodiesel in Brazil. It was thus an important substitute for soybean biodiesel.

In-situ catalytic bio-oil production from hydrothermal liquefaction of Cu-impregnated water hyacinth: Screening of reaction parameters

The rapid growth of water hyacinth (WH) is a major concern worldwide as it adversely affects the aquatic world's life by lowering the oxygen level or depleting the water's nutrients. In this study, the hydrothermal liquefaction of WH was performed by impregnating it with Cu and Co to enhance bio-oil production. It has been found that the Cu-impregnated-WH exhibited a high bio-oil yield in comparison to Co-impregnated-WH. The influence of reaction parameters e.g., reaction residence time, temperature, and the biomass-to-water ratio were also screened to achieve the maximum liquefaction. Further, the water-to-biomass ratio significantly tailored the bio-oil yields. It has been found that 0.2M-Cu-impregnated-WH with a 1:9 biomass-to-water ratio and 270 °C/30 min were the best-optimized conditions for the highest total bio-oil yield (41 wt%) and conversion (83%). The isolated optimum bio-oils were characterized by the GC-MS analysis to ascertain the composition of compounds that attributed to the maximum area% of N-containing and phenolics compounds. The maximum amount of both types of bio-oils was found to be high from the liquefaction of Cu-impregnated WH compared to non-catalytic. Moreover, the char was characterized by XRD, FT-IR, and TEM analysis, which confirmed the breaking of linkages of WH, and the presence of Cu in the form of CuO. The findings of the study clearly signify the potential of WH for sustainable energy production and the char obtained can be used for various other applications.

One-pot biogenic synthesis of C. limon/TiO2 with dual applications as an advance photocatalyst and antimicrobial agent

The present study portrays a facile, cost-effective, and environmentally benign way for the preparation of TiO2 nanoparticles utilizing C. limon extract, which possesses phytochemicals as reducing and stabilizing agents. Structural characterization by XRD reveals that C. limon/TiO2 NPs exhibit anatase-type tetragonal crystallinity. An average crystallite-size is calculated using Debye Scherrer's method (3.79 nm), Williamson–Hall plot (3.60 nm), and Modified Debye Scherrer plot (3.68 nm), which are very closely intercorrelated. The absorption peak at 274 nm (UV–visible spectrum) corresponds to the bandgap (Eg) value of 3.8 eV. The existence of different phytochemicals containing organic groups like N–H, C=O, and O–H, has been elucidated from FTIR along with Ti–O bond stretching at wavenumber 780 cm−1. Micro-structural investigations of TiO2 NPs using FESEM and TEM display different geometrical configurations involving spherical, pentagonal, hexagonal, heptagonal and capsule-like structures. BET and BJH analysis show mesoporous characteristics of synthesized nanoparticles with specific surface-area (97.6 m2 g−1), pore-volume (0.018322 cm3 g−1), and mean pore-diameter (∼7.5 nm) values. In adsorption studies, the influence of reaction parameters, i.e., catalyst dosage and contact-time, for removal of Reactive Green dye is explored along with Langmuir and Freundlich models. The highest adsorption capability is ∼219 mg g−1 for green dye. TiO2 displays an excellent photocatalytic efficiency of ∼96% towards the degradation of reactive green dye within 180 min and excellent reusable performance. C. limon/TiO2 is found to have an outstanding performance with a quantum yield value of 4.68 × 10−5 molecules photon−1 for Reactive Green dye degradation. Additionally, synthesized nanoparticles have exhibited antimicrobial activity against gram-positive Staphylococcus aureus (S. aureus) and gram-negative Pseudomonas aeruginosa (P. aeruginosa) bacteria.

Machine Learning Assisted Chemical Process Parameter Mapping on Lignin Hydrogenolysis

Lignin depolymerization has been studied for decades to produce carbon-neutral chemicals/biofuels and biopolymers. Among different chemical reaction pathways, catalytic hydrogenolysis favors reactions under relatively mild conditions, while its yield of bio-oil and high-value aromatic products is relatively high. In this study, the influence of reaction parameters on lignin hydrogenolysis are discussed by chemical process parameter mapping and modeled using three different machine learning algorithms based upon literature experimental data. The best R2 scores for solid residue and aromatic yield were 0.92 and 0.88 for xgboost, respectively. The parameter importance was examined, and it was observed that lignin-to-solvent ratio and average pore size have a larger impact on lignin hydrogenolysis results. Finally, the optimal conditions of lignin hydrogenolysis were predicted by chemical process parameter mapping using the best-fit machine learning model, which indicates that further process improvements can potentially generate higher yields in industrial applications.

Water recovery from wastewater by γFe2O3@Ti3C2Tx nanocomposites based on peroxymonosulfate activation

Advanced oxidation processes (AOPs) are efficient means for the water recovery by removing the organic pollutants in wastewater. In this study, γFe2O3@Ti3C2Tx nanocomposite was synthesized and utilized for the removal of micropollutants (i.e. ibuprofen, IBP) through peroxymonosulfate (PMS) activation. The characterization results suggest that γFe2O3 nanoparticles were uniformly decorated on the Ti3C2Tx MXene nanosheets surface. γFe2O3@Ti3C2Tx nanocomposite exhibited excellent catalytic ability and stability for PMS activation to generate reactive species for the elimination of IBP. The influence of reaction parameters, including catalyst, IBP and PMS concentration as well as initial pH value, were systematacially studied. The synergistic effect of the binary active sites (Fe and Ti) facilitated the cleavage of OO bond in PMS, thus contributing to the production of abundant sulfate radicals (SO4●-) and hydroxyl radicals (●OH) for the degradation of IBP. This study may shed light on the applications of heterogeneous catalyst for the degradation of organic pollutants through PMS activation.

Pyrrolidine-2,5-dione-derived ionic liquids promoted efficient transformation of flue gas CO2 into α-alkylidene cyclic carbonates at room temperature

The combination of pyrrolidine-2,5-dione-derived ionic liquids with silver acetate (AgOAc) were developed as binary catalysts for conversion of simulated flue gas CO2 and propargylic alcohols to α-alkylidene cyclic carbonates. By tuning different catalyst components, the [HTMG][Pyrro]/AgOAc system was confirmed to be the most efficient and exhibited an excellent synergistic action in facilitating the carboxylic cyclization under room temperature and solvent-free conditions. The influence of reaction parameters on carboxylic cyclization of CO2 with 2-methylbut-3-yn-2-ol were optimized. Under the determined conditions, the [HTMG][Pyrro]/AgOAc system was stable enough to show durable high activity in eight recycles, and also versatile in carboxylic cyclization of flue gas CO2 with other propargylic alcohols. Moreover, a thorough comparison of [HTMG][Pyrro]/AgOAc with the reported catalysts was provided and evaluated, the results suggested that the developed catalytic system has significant advantages in practical application. Finally, the mechanistic details for the conversion of CO2 into α-alkylidene cyclic carbonates catalyzed by [HTMG][Pyrro]/AgOAc was also elucidated on the basis of reactants activation.

Dual catalytic activity of antimony (III) oxide: The polymerization catalyst for synthesis of polyethylene terephthalate also catalyze depolymerization

In this study polyethylene terephthalate (PET) waste from drinking water bottles was converted to bis(2-hydroxyethyl) terephthalate (BHET) in the presence of antimony (III) oxide (Sb2O3) as the catalyst and excess ethylene glycol (EG). The yield of BHET, using 0.5 wt% of the catalyst, under 200°C and 2.1 bar was 97.5%, achieved in only 1 h. The crude of the reaction and the purified monomer was characterized by differential scanning calorimetry, infrared spectroscopy, high pressure liquid chromatography, thermogravimetric analysis, and nuclear magnetic resonance. The influences of reaction parameters, such as the catalyst loading, reaction time, EG:PET weight ratio, and reaction pressure on the yield of BHET was investigated. In addition, the activity of this catalyst was compared to zinc acetate, antimony (III) acetate, and antimony (V) oxide, demonstrating the highest catalytic activity of Sb2O3 for PET glycolysis. Since Sb2O3 is one of the catalysts for the industrial synthesis of PET, the results from this work can open up a venue for the synthesis of repolymerized PET from waste PET in the same glycolysis reactor.

Degradation mechanisms of cyanobacteria neurotoxin β-N-methylamino-l-alanine (BMAA) during UV254/H2O2 process: Kinetics and pathways.

In this work, the UV254/H2O2 process was utilized to remove β-N-methylamino-l-alanine (BMAA), a kind of cyanobacteria neurotoxin, and the influence of reaction parameters and environmental factors on the degradation of BMAA has been systematically investigated. The results showed that BMAA could be effectively removed in the UV254/H2O2 system compared to UV or H2O2 alone and OH was confirmed as the main ROS to degrade BMAA. The degradation rate of BMAA increased first and then decreased with the increase of pH and the maximum kobs was 0.1545 min-1 obtained at pH 9. The removal of BMAA in the UV254/H2O2 system was inhibited in actual water, while the degradation rate of BMAA in actual water could still exceed 90% by appropriately extending the reaction time. The decrease in the degradation efficiency of BMAA in actual water was primarily due to the ultraviolet light absorption and competition effects of NOM, and anions (Cl- and HCO3-) would also inhibit the degradation of BMAA. Five by-products ([M-H]-=118, 103, 88, 87 and 59) were identified in this study and the degradation pathways of BMAA were proposed. The production of by-products was attributed to the fracture of the C-N bond and hydroxylation reaction. This study is worthwhile to deepen the understanding of the degradation mechanism of BMAA in the UV254/H2O2 system.

Visible-light-assisted peroxydisulfate activation over Ag6Si2O7/Cu(II)-modified palygorskite composite for the effective degradation of organic pollutants by radical and nonradical pathways

Photoassisted persulfate activation (PPA) is highly efficient oxidation process, but the eligible catalysts are scarce. Herein, a visible-light-responsive Ag6Si2O7 was anchored on Cu(II)-exchanged attapulgite (Cu-Pal) via a facile precipitation-deposition method to construct a novel PDS activator. The synthesized catalyst was systemically analyzed by a series of characterization techniques. The results revealed that Ag6Si2O7 nanoparticles were evenly dispersed on Cu-Pal to form heterojunction. 16%-Ag6Si2O7/Cu-Pal, an optimal catalyst exhibited excellent catalytic performance and stability in the visible-light-assisted PDS activation for AR18 degradation. The influences of reaction parameters on this process were investigated. Under the optimal conditions ([catalyst] = 1.0 g L−1, [PDS] = 3.9 mM, pHi = 5.1), 50 mg L−1 of AR18 was completely degraded within 30 min. More importantly, quenching experiments and EPR tests revealed that besides the common SO4•− and •OH, 1O2 and O2•− were generated as main reactive oxygen species in the PPA by 16%-Ag6Si2O7/Cu-Pal. Moreover, it was found that surface hydroxyl groups of the catalyst and copper species incorporated in Pal could significantly influence PDS activation and ROS generation. Based on these results, together with PDS decomposition, fluorescent probe analysis, and XPS analysis of the used catalyst, the possible mechanisms of the PPA by 16%-Ag6Si2O7/Cu-Pal were proposed. Finally, the versatility and practicability of the established PPA process were verified by degrading other organic contaminants and testing effects of the coexisting anions and water matrices on AR18 degradation. This study may provide new insights for designing and developing the efficient heterogeneous catalysis for wastewater treatment via persulfate-based AOP.

Influence of reaction parameters on the fate of nitrogen during the supercritical water gasification of dewatered sewage sludge

This study investigated the effects of different parameters on the fate of nitrogen (N) in products after supercritical water gasification (SCWG) of dewatered sewage sludge (DSS). N distribution and morphology were most affected by temperature, followed by reaction time and heating rate, while reaction pressure had little effect on them. In terms of specific performance, higher temperature, longer reaction time, and slower heating rate were beneficial to the increase of NH4+-N content in the liquid phase. Compared with raw sludge, after SCWG, the solid phase contained more inorganic-N and less protein-N, a certain proportion of quaternary-N and nitrile-N. The proportion of N-containing compounds in the biocrude phase was between 0.26%–20.34%, suggesting the importance of more research on N in the biocrude phase. The recovery rate of N in all samples was between 64.34%–93.82%. The major proportion of N (42.27%–60.91%) was transformed into the liquid phase, while the remaining entered the solid phase (10.54%–21.45%) and the biocrude phase (6.18%–15.78%). These findings are helpful to better understand the principle of N distribution in products of DSS after SCWG and provide some new ideas for reducing N-containing by-product formation in the future.

Process optimization for the rapid conversion of calcite into hydroxyapatite microspheres for chromatographic applications

Microsphere hydroxyapatite (HAp) is widely used in various biomedical and chromatographic applications. The work described in this manuscript focuses on a dissolution precipitation method for production of HAp microspheres. This method overcomes certain drawbacks of conventional preparation methods used for HAp preparation, which produce polydisperse particles and are time-consuming and expensive. In the present work, the calcium carbonate (calcite) particles were directly and rapidly converted into HAp microspheres using an inexpensive dissolution precipitation method. The effects of the reaction temperature, time, and mechanical stirring rates were studied, and the reaction parameters were optimized. As confirmed by the XRD studies, the higher reaction temperature and time promote complete HAp conversion, while calcite residues were observed for lower temperatures and times. SEM images show the influence of reaction parameters on the surface microstructure of the microspheres produced. It was observed that the HAp microspheres undergo disintegration at a higher stirring rate. The reaction parameters optimized in this work were ideal for preparing HAp microspheres. The resultant HAp particles were utilized as matrices for chromatographic separation of protein mixtures.

Heterogeneous activation of peroxymonosulfate by SBA-15 supported Co-based bimetallic catalysts for unsymmetrical dimethylhydrazine degradation in water

A set of SBA-15 supported Co-based bimetallic catalysts was prepared by the incipient wetness impregnation method and then used to activate peroxymonosulfate (PMS) to eliminate unsymmetrical dimethylhydrazine (UDMH). The physicochemical properties of catalysts were studied by serious of techniques. The reusability of the catalyst and the influence of reaction parameters were investigated. The results showed that AgCo/SBA-15 exhibited the best degradation efficiency. The good conductivity of Ag nanoparticles, strong UDMH adsorption ability, moderate Co ions leaching concentration, and the synergistic effect between Co and Ag were responsible for the excellent catalytic activity. Complete UDMH (100 mg/L) degradation and 75.2 % mineralization could be achieved at the reaction times of 15 and 180 min, respectively. The quenching experiments and EPR analysis indicated 1O2 played a dominant role in UDMH degradation. Furthermore, the possible degradation pathways were proposed according to the GC–MS intermediates and DFT calculation. This study provides new insights into heterogeneous activation of PMS and offers an efficient method for wastewater treatment.

Vital Role of Synthesis Temperature in Co–Cu Layered Hydroxides and Their Fenton-like Activity for RhB Degradation

Cu and Co have shown superior catalytic performance to other transitional elements, and layered double hydroxides (LDHs) have presented advantages over other heterogeneous Fenton catalysts. However, there have been few studies about Co–Cu LDHs as catalysts for organic degradation via the Fenton reaction. Here, we prepared a series of Co–Cu LDH catalysts by a co-precipitation method under different synthesis temperatures and set Rhodamine B (RhB) as the target compound. The structure-performance relationship and the influence of reaction parameters were explored. A study of the Fenton-like reaction was conducted over Co–Cu layered hydroxide catalysts, and the variation of synthesis temperature greatly influenced their Fenton-like catalytic performance. The Co–Cut=65°C catalyst with the strongest LDH structure showed the highest RhB removal efficiency (99.3% within 30 min). The change of synthesis temperature induced bulk-phase transformation, structural distortion, and metal–oxygen (M–O) modification. An appropriate temperature improved LDH formation with defect sites and lengthened M–O bonds. Co–Cu LDH catalysts with a higher concentration of defect sites promoted surface hydroxide formation for H2O2 adsorption. These oxygen vacancies (Ovs) promoted electron transfer and H2O2 dissociation. Thus, the Co–Cu LDH catalyst is an attractive alternative organic pollutants treatment.

Catalytic activity of CuI/CuII cyanide based phenanthroline-bicarbonate system for enhancing aerobic oxidation of 2,6-di-tert-butylphenol

The metal organic framework {[Cu2(CN)3(phen)3]5H2O} MOF1- bicarbonate system was investigated as an efficient catalyst for aerobic oxidation of 2, 6-di-tert-butylphenol (2,6- DTBP). The catalytic system showed very efficient catalytic behavior for the oxidation of selective coupling of 2,6- DTBP to 3,3′,5,5′-tetra-tert-butyl-4,4′-diphenoquinone (DPQ) in excellent yield. The influence of reaction parameters on the selective oxidation of 2, 6-DTBP to DPQ had been investigated. Photoluminescence probing technology of Disodium salt of terephthalic acid as well as scavenging experiments revealed the creation of the hydroxyl radicals as the main active oxidation radicals produced by the MOF1/O2/basic bicarbonate system. The oxidation reaction mechanism was also discussed. The recycled catalytic system retained its activity for eight successive runs.