Catalysis TodayPub Date : 2025-05-26DOI: 10.1016/j.cattod.2025.115396
J. Blanco-Cejas , I. Fernández-Ruiz , B. Hernández , P. Gutiérrez-Sánchez , M. Montaña , B. García , L.F. Bautista , J. Moreno , J. Iglesias
{"title":"Sorbitol dehydration in 1,4-dioxane: Study of reaction conditions and kinetic analysis including mass transfer control","authors":"J. Blanco-Cejas , I. Fernández-Ruiz , B. Hernández , P. Gutiérrez-Sánchez , M. Montaña , B. García , L.F. Bautista , J. Moreno , J. Iglesias","doi":"10.1016/j.cattod.2025.115396","DOIUrl":"10.1016/j.cattod.2025.115396","url":null,"abstract":"<div><div>This work assesses the influence of temperature, catalyst loading and water content on the dehydration of sorbitol to isosorbide using a commercially available porous strong acid resin (Amberlyst A70). The results from the catalytic tests show that the presence of water critically drops the reaction efficiency. Water not only participates in the dehydration reaction but also interacts with the sulfonic acid groups of the catalyst, competing for the adsorption to the catalytic sites with the substrate and intermediate products, varying the performance of the sulfonic acid resin. This has a strong influence on the kinetics of the transformation, so that a comprehensive assessment of different kinetic models for heterogeneous catalytic systems evaluating the role of saturation of catalytic sites, different adsorption isotherms, and different controls in the mass transfer has been carried out. Among all the studied alternatives, the model that describes the best the reaction performance is a Langmuir-Hinshelwood-Hougen-Watson model with saturation on the catalytic sites featured by mass transfer control in the desorption of the intermediate and final products. Despite the experimental tests have been performed in stirred tanks and other studies have not addressed mass transfer from the pores to the solvent core, the control mostly occurs at the catalyst pores. This is particularly observed for the sorbitans acting as intermediate products since they suffer from limitations in desorption and the latter adsorption to continue with the reaction to sorbitans. This study sheds light on the behaviour of strong cation exchange resins as heterogeneous acid catalysts in dehydration reactions, quite common transformations, specially important in the conversion of highly oxygenated biomass-derived molecules.</div></div>","PeriodicalId":264,"journal":{"name":"Catalysis Today","volume":"459 ","pages":"Article 115396"},"PeriodicalIF":5.2,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144167977","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Catalysis TodayPub Date : 2025-05-24DOI: 10.1016/j.cattod.2025.115385
S. Ted Oyama , Yan Xi , Jason Gaudet , Yong-Kul Lee
{"title":"Probing electron transfer in catalytic reactions: A Catalysis Golden Rule and the role of non-innocent supports","authors":"S. Ted Oyama , Yan Xi , Jason Gaudet , Yong-Kul Lee","doi":"10.1016/j.cattod.2025.115385","DOIUrl":"10.1016/j.cattod.2025.115385","url":null,"abstract":"<div><div>Catalytic reactions in which the rate-determining step (rds) is electron transfer often display activation energies that vary little with composition or supports. The present study presents an experimental means to confirm that electron transfer is involved in the rds. The concepts presented here have applicability in heterogeneous catalysis. electrocatalysis. and battery systems. Ozone decomposition serves an example of a catalytic reaction in which electron transfer is rate-limiting. Use is made of in situ X-ray absorption near-edge structure (XANES) to probe the electron transfer and extended X-ray absorption fine structure to characterize catalyst structure. The catalysts were 3.0 and 10 wt% manganese oxide supported on SiO<sub>2</sub> and Al<sub>2</sub>O<sub>3.</sub> The alumina-supported catalysts were more active for the decomposition of ozone with higher turnover frequencies (TOFs) than the silica-supported catalysts. In both catalysts kinetic studies indicated that the rate-determining step was the decomposition of an adsorbed peroxo species on a Mn center, a step that involves electron transfer. XANES measurements at reaction conditions showed that alumina-supported catalysts had larger post-edge areas, namely higher unoccupied density of states ρ(E), which is associated with higher electron-accepting capability. The rate constant for the peroxide decomposition depends on ρ(E), so has the same form as Fermi's Golden Rule governing intra-atomic electron transitions. As such, the catalytic electron transfer is described as following a Catalysis Golden Rule. The usage is applicable to systems where loading is varied with a single support or where different supports are involved, in which case the supports are designated as non-innocent supports if they affect <span><math><mrow><mi>ρ</mi><mrow><mo>(</mo><mi>ϵ</mi><mo>)</mo></mrow></mrow></math></span>. The in situ XANES method provides a means of probing an electronic effect that differs from the conventional ligand effect.</div></div>","PeriodicalId":264,"journal":{"name":"Catalysis Today","volume":"459 ","pages":"Article 115385"},"PeriodicalIF":5.2,"publicationDate":"2025-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144167978","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Catalysis TodayPub Date : 2025-05-23DOI: 10.1016/j.cattod.2025.115398
Shixin Chang , Kaining Li , Xiaofeng Wu , Zhiqiang Jiang , Qin Li , Yuhan Li , Sónia A.C. Carabineiro , Yi Liu , Kangle Lv
{"title":"Enhanced photocatalytic CO2-to-CH4 conversion through K+-ion induced crystallization of carbon nitride","authors":"Shixin Chang , Kaining Li , Xiaofeng Wu , Zhiqiang Jiang , Qin Li , Yuhan Li , Sónia A.C. Carabineiro , Yi Liu , Kangle Lv","doi":"10.1016/j.cattod.2025.115398","DOIUrl":"10.1016/j.cattod.2025.115398","url":null,"abstract":"<div><div>The photocatalytic reduction of CO<sub>2</sub> to methane using carbon nitride holds significant promise for sustainable fuel production; however, its performance remains limited due to the poor crystallization of pristine carbon nitride (PCN). In this study, KCl and KBr were used as templates to prepare crystalline carbon nitride (CCN). The results showed that K<sup>+</sup> ions promoted the formation of CCN by intercalating into the structure, reducing the exposure of terminal amino groups, and significantly improving the photocatalytic CO<sub>2</sub>-to-CH<sub>4</sub> conversion efficiency, which increased from less than 5 % in K-free melamine-based PCN (CN-M) to 41 % in CCN-MBr (sample prepared with KBr) and 53 % in CCN-MCl (material synthesized with KCl), respectively. Similar improvements were obtained in dicyandiamide-derived PCN (CN-D) and CCN samples (CCN-DBr and CCN-DCl, prepared with KBr and KCl, respectively). The incorporation of K<sup>+</sup> into the tri-s-triazine structure played a pivotal role in charge separation, while the reduced exposure of amino groups lowered the band gap of the material. <em>In situ</em> diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) was used to identify intermediates during photocatalytic CO<sub>2</sub> reduction. Density functional theory (DFT) calculations showed that the Gibbs free energy for *CHO formation decreased from 0.80 eV (PCN) to 0.53 eV (CCN), favoring methane production over CCN. This study lays the foundation for further research on selective CO<sub>2</sub> reduction to produce hydrocarbon fuels.</div></div>","PeriodicalId":264,"journal":{"name":"Catalysis Today","volume":"458 ","pages":"Article 115398"},"PeriodicalIF":5.2,"publicationDate":"2025-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144154910","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Catalysis TodayPub Date : 2025-05-23DOI: 10.1016/j.cattod.2025.115383
Vitor Gonçalves Benigno , André Von-Held Soares , Fernando Cunha Peixoto , Fabio Barboza Passos
{"title":"Microkinetic modeling of the hydrogenolysis of glycerol in water over Pt/Fe3O4 catalyst","authors":"Vitor Gonçalves Benigno , André Von-Held Soares , Fernando Cunha Peixoto , Fabio Barboza Passos","doi":"10.1016/j.cattod.2025.115383","DOIUrl":"10.1016/j.cattod.2025.115383","url":null,"abstract":"<div><div>A mechanism for the hydrogenolysis of glycerol over Pt-Fe/Al₂O₃ was proposed without choosing any elementary step as rate-determining or assuming thermodynamic equilibrium for any species. The developed model provided an adequate statistical fit for the concentrations of glycerol, acetol, 1,2-propanediol, ethylene glycol, and 1-propanol, exhibiting low fundamental variance and satisfactory agreement with the experimental data. Additionally, the model effectively tracked the concentration of surface intermediates, which tended to pseudo steady state behavior.</div></div>","PeriodicalId":264,"journal":{"name":"Catalysis Today","volume":"459 ","pages":"Article 115383"},"PeriodicalIF":5.2,"publicationDate":"2025-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144167979","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Catalysis TodayPub Date : 2025-05-21DOI: 10.1016/j.cattod.2025.115379
Benjamín Torres-Olea , Antonio Pérez-Merchán , Carolina Zampieri , Rubén Luna-León , José J. Reina , Ramón Moreno-Tost , Juan Antonio Cecilia , Cristina García-Sancho , Pedro Maireles-Torres
{"title":"Novel method for the production of Zr-doped Beta-zeolites and their use in the production of 5-(hydroxymethyl)furfural etherified biofuels","authors":"Benjamín Torres-Olea , Antonio Pérez-Merchán , Carolina Zampieri , Rubén Luna-León , José J. Reina , Ramón Moreno-Tost , Juan Antonio Cecilia , Cristina García-Sancho , Pedro Maireles-Torres","doi":"10.1016/j.cattod.2025.115379","DOIUrl":"10.1016/j.cattod.2025.115379","url":null,"abstract":"<div><div>A Beta zeolite with a high Al:Si molar ratio was dealuminated and the resulting silanol nests were functionalized with Zr to generate Lewis acid sites, for the catalytic transfer hydrogenation of the carbonyl group of 5-(hydroxymethyl)furfural (HMF), whose subsequent etherification with isopropanol led to the formation of 2,5-bis(isopropoxymethyl)furan, a potential biofuel. In this work, it was demonstrated that the parent zeolite was incapable of performing the reduction of HMF, instead directing the reaction towards the production of 5-(isopropoxymethyl)furfural (IMF) (90 % yield after 1 h at 180 ºC, with 150 mg of HMF). However, Zr-doped zeolites allowed the conversion of 5-(hydroxymethyl)furfural into its mono- and bis-etherified derivatives, and a 62 % yield of 2,5-bis(isopropoxymethyl)furan was achieved with the zeolite with a Si:Zr molar ratio of 30, after 5 h at 180 ºC. Zr loading was identified as an important factor in the catalyst deactivation due to the blocking of accessibility to the active sites required for the process at high Zr loading.</div></div>","PeriodicalId":264,"journal":{"name":"Catalysis Today","volume":"458 ","pages":"Article 115379"},"PeriodicalIF":5.2,"publicationDate":"2025-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144137938","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Catalysis TodayPub Date : 2025-05-21DOI: 10.1016/j.cattod.2025.115377
Uriel Chacon-Argaez, Marco A. Alvarez-Amparán, Luis Cedeño-Caero
{"title":"Characterization and performance of Ag nanoparticles on TiO2 for the photocatalytic oxidation of dibenzothiophene compounds","authors":"Uriel Chacon-Argaez, Marco A. Alvarez-Amparán, Luis Cedeño-Caero","doi":"10.1016/j.cattod.2025.115377","DOIUrl":"10.1016/j.cattod.2025.115377","url":null,"abstract":"<div><div>Ag nanoparticles on TiO<sub>2</sub> were synthesized and characterized to determine its potential use as photocatalysts and then were assessed in the photocatalytic oxidation of dibenzothiophene compounds. The incorporation of Ag onto the TiO<sub>2</sub> structure was investigated as a function of Ag loading. The catalysts were prepared with Ag loadings of 1, 3, 5 and 10 wt% and were characterized by scanning electron microscopy (SEM-EDX), transmission electron microscopy (TEM), X-ray diffraction (XRD), UV–vis diffuse reflectance spectroscopy (DRS), photoluminescence (PL) spectroscopy and electrochemical impedance spectroscopy (EIS). The characterization results showed that Ag was incorporated as nanoparticles onto TiO<sub>2</sub> anatase and that their incorporation decreased the bandgap energy and the recombination rate of photogenerated [e<sup>-</sup>/h<sup>+</sup>] species. In addition, it was determined that the proximity of the conduction band energy of the catalysts to the reduction potential of O<sub>2</sub>/•O<sub>2</sub><sup>-</sup> triggered the generation of •O<sub>2</sub><sup>-</sup> radical on the catalytic surface. It was due to the localized surface plasmon resonance effect, improving the charge-carrier capacity and therefore the interfacial electron transfer. The photocatalytic oxidation of DBT, 4-MDBT and 4,6-DMDBT was successfully achieved in 90 min under a combined UV–vis irradiation. Noteworthy, the most recalcitrant compound was more reactive, in the opposite trend to that reported in the conventional non-photocatalytic desulfurization system.</div></div>","PeriodicalId":264,"journal":{"name":"Catalysis Today","volume":"458 ","pages":"Article 115377"},"PeriodicalIF":5.2,"publicationDate":"2025-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144137937","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Catalysis TodayPub Date : 2025-05-21DOI: 10.1016/j.cattod.2025.115397
Onintze Parra, Ander Portillo, Javier Ereña, Javier Bilbao, Ainara Ateka
{"title":"Production of isoparaffinic gasoline from CO2/CO over ZnO-ZrO2/nano-sized HZSM-5 tandem catalyst","authors":"Onintze Parra, Ander Portillo, Javier Ereña, Javier Bilbao, Ainara Ateka","doi":"10.1016/j.cattod.2025.115397","DOIUrl":"10.1016/j.cattod.2025.115397","url":null,"abstract":"<div><div>The performance (conversion, yield, and product selectivity) of ZnO-ZrO<sub>2</sub>/nano-sized HZSM-5 tandem catalysts in the direct hydrogenation of CO<sub>2</sub>/CO (CO<sub>x</sub>) mixtures to C<sub>5+</sub> hydrocarbons (gasoline) was investigated at 50 bar and 420 ºC. A 1/1 mass ratio between the acid and metallic catalysts in the tandem configuration proved effective for maximizing synergy between the stages of methanol synthesis and its conversion, significantly shifting the thermodynamic equilibrium of methanol synthesis. The tandem catalyst configuration within a single particle (bifunctional catalyst), which is of interest for scale-up, faces challenges compared to physical mixing of the catalysts. These include deterioration of catalytic properties during pelletization, partially blocking the zeolite micropores and acid sites. However, the shorter distance between the metallic and acid sites in the bifunctional catalyst enhances synergy between the reaction stages, compensating for these issues. As a result, with the bifunctional catalyst it is achieved high CO<sub>x</sub> and CO<sub>2</sub> conversions (27.9 % and 32.6 %, respectively) and a high gasoline yield (21.3 %). The isoparaffinic composition (70 %) of the produced gasoline, with a negligible aromatic content, makes it suitable for applications requiring low environmental impact and promising for integration into refinery gasoline pools.</div></div>","PeriodicalId":264,"journal":{"name":"Catalysis Today","volume":"458 ","pages":"Article 115397"},"PeriodicalIF":5.2,"publicationDate":"2025-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144124506","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Catalysis TodayPub Date : 2025-05-20DOI: 10.1016/j.cattod.2025.115374
Dominik Knozowski , Aleksandra Kędzierska-Sar , Robert Ranecki , Piotr Kuświk , Maciej Fronczak , Stanisław Gierlotka , Sebastian Arabasz , Amil Aligayev , Ulkar Jabbarli , Francisco Javier Dominguez–Gutierrez , Marta Gmurek
{"title":"Plasma–enhanced chemical vapor deposition of Co3O4 thin films as a new approach for improving oxygen evolution activity","authors":"Dominik Knozowski , Aleksandra Kędzierska-Sar , Robert Ranecki , Piotr Kuświk , Maciej Fronczak , Stanisław Gierlotka , Sebastian Arabasz , Amil Aligayev , Ulkar Jabbarli , Francisco Javier Dominguez–Gutierrez , Marta Gmurek","doi":"10.1016/j.cattod.2025.115374","DOIUrl":"10.1016/j.cattod.2025.115374","url":null,"abstract":"<div><div>The development of efficient and durable electrocatalysts for the oxygen evolution reaction (OER) remains a key challenge in advancing sustainable energy technologies. Among cobalt – based materials, spinel Co<sub>3</sub>O<sub>4</sub> is a widely studied catalyst; however, its bulk form often suffers from poor electrical conductivity and limited accessibility of active sites. In this study, we demonstrate that plasma–enhanced chemical vapor deposition (PECVD), followed by thermal annealing in air, provides an effective route for vacancy engineering in Co<sub>x</sub>O<sub>y</sub> thin films inducing both oxygen and cobalt vacancies without relying on foreign dopants or ion–exchange processes. The Co<sub>3</sub>O<sub>4</sub> films demonstrated exceptional OER performance, with the best sample achieving a low overpotential of 343 mV at 10 mA cm<sup>–2</sup>, and a high capability for Co<sup>4+</sup> formation, a key intermediate in the OER process. Additionally, the films exhibited catalytic activity not only at the surface, but also throughout their entire volume, highlighting the significance of deposition time and film thickness in optimizing OER performance. Ab–initio calculations, including Bader charge analysis and density of states evaluations, further elucidate the role of defect chemistry: oxygen vacancies enhance *OH adsorption and drive structural reconstruction, while cobalt vacancies reduce the energy barrier for deprotonation and facilitate the Co<sup>3+</sup> → Co<sup>4+</sup> oxidation process. Overall, this work establishes PECVD combined with thermal treatment as a powerful and scalable strategy for tailoring defect concentrations in cobalt oxide catalysts. The approach offers valuable insights into the rational design of high–performance OER catalysts, with broad implications for electrochemical energy conversion technologies.</div></div>","PeriodicalId":264,"journal":{"name":"Catalysis Today","volume":"458 ","pages":"Article 115374"},"PeriodicalIF":5.2,"publicationDate":"2025-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144115123","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Catalysis TodayPub Date : 2025-05-19DOI: 10.1016/j.cattod.2025.115367
Yaoyi Hu , Xiqiang Yuan , Zhengquan Zhang , Yu Zhang , Han Ma , Yunfei He , Shaoyun Shan , Tianding Hu
{"title":"Preparation of solid superacid catalyst Al2(SO4)3/ZrO2-TiO2 and its mechanism of borneol synthesis from pinene","authors":"Yaoyi Hu , Xiqiang Yuan , Zhengquan Zhang , Yu Zhang , Han Ma , Yunfei He , Shaoyun Shan , Tianding Hu","doi":"10.1016/j.cattod.2025.115367","DOIUrl":"10.1016/j.cattod.2025.115367","url":null,"abstract":"<div><div>Natural borneol has enormous medicinal value (like clearing heat, detoxifying, relieving pain, and other effects) but has a low yield and high price. Compared with the natural extraction method to obtain borneol, a synthetic method has significant advantages such as high yield, environmental protection, and high economic benefits. In the synthesis method, the catalyst is the most key factor. In this study, two catalysts (SO<sub>4</sub><sup>2-</sup>/ZrO<sub>2</sub>-TiO<sub>2</sub> and Al<sub>2</sub>(SO<sub>4</sub>)<sub>3</sub>/ZrO<sub>2</sub>-TiO<sub>2</sub>) with high catalytic performance and high positive selectivity were synthesized by impregnation method to synthesize borneol from α-pinene. The optimum synthesis conditions of SO<sub>4</sub><sup>2-</sup>/ZrO<sub>2</sub>-TiO<sub>2</sub> were as follows: n(Zr): n(Ti) = 3: 1, sulfuric acid concentration 2 mol/L, calcination temperature 550 °C, the yield of borneol was 68.14 %. Based on the preparation of catalyst SO<sub>4</sub><sup>2-</sup>/ZrO<sub>2</sub>-TiO<sub>2</sub>, the optimum synthesis conditions of Al<sub>2</sub>(SO<sub>4</sub>)<sub>3</sub>/ZrO<sub>2</sub>-TiO<sub>2</sub> were as follows: the concentration of aluminum sulfate was 0.4 mol/L, the calcination temperature was 600 °C, and the yield of borneol was 74.58 %, Compared with the highest yield of 59.89 % reported in the existing literature, the performance is improved by 13.96 %. In addition, the mechanism of the esterification and saponification reaction of borneol has been in the blank stage. We used the density functional theory (DFT) to explore the reaction mechanism.</div></div>","PeriodicalId":264,"journal":{"name":"Catalysis Today","volume":"458 ","pages":"Article 115367"},"PeriodicalIF":5.2,"publicationDate":"2025-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144124508","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Catalysis TodayPub Date : 2025-05-19DOI: 10.1016/j.cattod.2025.115388
Deepak Bhushan , Srikant Kumar , Prasenjit Mondal
{"title":"Catalytic co-pyrolysis of walnut shell and high-density polyethylene (HDPE) using nickel-doped gamma alumina spent adsorbent derived catalyst: Kinetics, thermodynamic and prediction modelling using artificial neural network (ANN) approach","authors":"Deepak Bhushan , Srikant Kumar , Prasenjit Mondal","doi":"10.1016/j.cattod.2025.115388","DOIUrl":"10.1016/j.cattod.2025.115388","url":null,"abstract":"<div><div>The present study is focused on evaluating the catalytic effect of nickel impregnated spent aluminium hydroxide nanoparticle (AHNP) adsorbent-based catalyst in the co-pyrolysis of walnut shell and high-density polyethylene (HDPE). The analysis was conducted through kinetic and thermodynamic assessments. Specific kinetic parameters, such as activation energy and pre-exponential factor, along with thermodynamic parameters, including entropy, enthalpy, and Gibbs free energy, was estimated using iso-conversional models such as Ozawa Flynn Wall (OFW), Kissinger Akahira Sunose (KAS) and Starink model. Thermogravimetric analysis of pyrolysis of walnut shell, HDPE, blend of walnut shell and HDPE (1:1) and blend of feedstock with catalyst (1:1) was conducted at different heating rates of 10–40 °C/min respectively. The results showed that the incorporation of nickel doped gamma alumina (NAO) catalyst lowered the activation energy (E<sub>a</sub>) of co-pyrolysis of walnut shell and HDPE by 28 % as calculated by KAS method. Moreover, artificial neural network (ANN) was also applied for the predictive modelling of the degradation of walnut shell and HDPE where high regression (R≈0.99) as well as low mean squared error (<10<sup>−5</sup>) illustrated the accurate prediction of complex biomass and plastics degradation by the ANN model. Therefore, catalyst derived from waste AHNP has considerable potential to be utilized for the co-pyrolysis of biomass with plastics, enhancing the process's cost effectiveness, environmental sustainability, and renewability.</div></div>","PeriodicalId":264,"journal":{"name":"Catalysis Today","volume":"459 ","pages":"Article 115388"},"PeriodicalIF":5.2,"publicationDate":"2025-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144168070","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}