South African Journal of Chemical Engineering最新文献

{"title":"Recovery of fuel liquid from plastic waste using Ni/ZSM-5 catalyst by distillation bubble cap plate column","authors":"Ramli Thahir ,&nbsp;Agung Prabowo ,&nbsp;Pintaka Kusumaningtyas ,&nbsp;Muh. Irwan ,&nbsp;Alwathan ,&nbsp;Arief Adhiksana ,&nbsp;Hanny Frans Sangian","doi":"10.1016/j.sajce.2025.12.019","DOIUrl":"10.1016/j.sajce.2025.12.019","url":null,"abstract":"<div><div>The valorization of polypropylene (PP) plastic waste into high-value liquid fuels via catalytic pyrolysis represents a promising pathway toward sustainable waste-to-energy conversion. This study investigates the optimization of liquid fuel yield using a bifunctional Ni/ZSM-5 catalyst synthesized through impregnation. A total of 500 g of waste PP and 50 g of Ni/ZSM-5 (PP:Ni/ZSM-5 = 10:1) were processed in a stainless-steel fixed-bed semi-batch reactor over a temperature range of 420–580 °C. The evolved vapors were fractionated through a four-tray distillation bubble-cap column and condensed at ±5 °C. The Ni/ZSM-5 catalyst significantly enhanced cracking activity, enabling high liquid fuel recovery at lower operating temperatures. The best-performing temperature identified in this study was 480 °C, which yielded 77 wt.% liquid oil and 17 wt.% fuel gas whereas further heating beyond this point favored secondary cracking, converting liquid fractions into gaseous products. Fractional distillation revealed kerosene-range hydrocarbons in trays I–II and gasoline-range fractions in trays III–IV, indicating selective hydrocarbon distribution. These results demonstrate that Ni/ZSM-5 offers dual functionality for efficient cracking and aromatization, thereby improving product selectivity and energy recovery. The findings underscore the potential of catalytic pyrolysis as a scalable strategy for transforming plastic waste into alternative liquid transportation fuels while reducing environmental burden.</div></div>","PeriodicalId":21926,"journal":{"name":"South African Journal of Chemical Engineering","volume":"56 ","pages":"Article 100826"},"PeriodicalIF":0.0,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145963416","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Zeolite pellet fabrication for biogas purification: Characterization and CO2 adsorption performance","authors":"Bambang Trisakti ,&nbsp;Rivaldi Sidabutar ,&nbsp;Irvan Irvan ,&nbsp;Farida Hanum ,&nbsp;Mhd. Rivaldi Syahputra ,&nbsp;Hani Suhastifa Rambe ,&nbsp;Noersukma Dwi Gusty ,&nbsp;Muhammad Syaifan ,&nbsp;Michael Michael ,&nbsp;Thiodorus Marvin Tjandra ,&nbsp;Sheylin Wimora Lumban Tobing ,&nbsp;Peer Mohamed Abdul","doi":"10.1016/j.sajce.2026.01.004","DOIUrl":"10.1016/j.sajce.2026.01.004","url":null,"abstract":"<div><div>The escalating urgency for renewable energy solutions and sustainable waste management strategies has intensified research into biogas purification technologies, particularly addressing the critical need for efficient CO₂ removal to enhance methane concentration. This study optimized zeolite pellet fabrication and evaluated their CO₂ adsorption performance for biogas purification. Zeolite samples were systematically processed through pelletization and calcination procedures, with experimental parameters encompassing particle sizes (50-140 mesh), calcination temperatures (200-400^○C), and durations (2-4 hours). The pelletization process achieved optimal yield performance of 75.97±0.70% under conditions of 50 mesh particle size, 200^○C calcination temperature, and 2-hour duration, corresponding to maximum pellet density of 1.94±0.03 g/cm³. Water adsorption capacity reached its peak at 3.35±0.11% utilizing 140 mesh zeolite calcined at 400^○C for 4 hours. Most significantly, CO₂ removal efficiency achieved 92.5±0.75% under optimal conditions of 140 mesh particle size, 400^○C calcination temperature, and 4-hour calcination duration. Comprehensive characterization revealed crystallite size reduction from 53.31 nm to 37.41 nm following activation, while scanning electron microscopy confirmed heterogeneous pore structure with grain-like surface morphology. Energy dispersive X-ray spectroscopy analysis indicated substantial oxygen content increase from 31.31% to 58.30% post-CO₂ adsorption, accompanied by carbon content decrease from 30.59% to 5.54%. N₂ adsorption quantified surface area, pore volume, and pore diameter as 283.01 m²/g, 0.292 cc/g, and 2.569 Å, respectively. These findings establish zeolite pellets as highly effective CO₂ adsorbents with substantial potential for industrial-scale biogas purification implementation.</div></div>","PeriodicalId":21926,"journal":{"name":"South African Journal of Chemical Engineering","volume":"56 ","pages":"Article 100831"},"PeriodicalIF":0.0,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145981942","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Electrochemical detection of para-nitrophenol employing a glassy carbon electrode modified with graphene–zinc oxide nanocomposite for enhanced sensitivity","authors":"Riyaz Ahmad Dar ,&nbsp;Gowhar A. Naikoo ,&nbsp;Ashwini Kumar Srivastava ,&nbsp;Israr Ul Hassan ,&nbsp;Shashi P. Karna ,&nbsp;Lily Giri ,&nbsp;Ahamad M.H. Shaikh ,&nbsp;Mashallah Rezakazemi ,&nbsp;Waqar Ahmed","doi":"10.1016/j.sajce.2026.01.003","DOIUrl":"10.1016/j.sajce.2026.01.003","url":null,"abstract":"<div><div>The graphene-zinc oxide nanocomposite (GN(ZnO)-NC) was investigated as an electrochemical sensing platform for the highly sensitive detection of para-nitrophenol (p-NP). Zinc oxide nanoparticles (ZnO<img>NPs) were prepared through a modified wet-chemical synthesis, employing zinc nitrate and potassium hydroxide as precursor materials. Starch was incorporated during the synthesis process to function as a capping and stabilizing agent, promoting uniform nanoparticle dispersion and preventing agglomeration. Graphene-oxide was reduced to graphene in the presence of ZnO<img>NPs using glucose as a reductant in a simple and environmentally friendly method to create GN-ZnO nanocomposite. A comprehensive characterization of the synthesized nanocomposite (NC) was conducted to evaluate its crystal structure, degree of crystallinity, surface morphology, elemental composition, and phase properties. This was achieved using various techniques, including scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HR-TEM), energy-dispersive X-ray spectroscopy (EDX), X-ray diffraction (XRD), and Raman spectroscopy. The electrochemical performance of the GN(ZnO)-NC layer placed on the glassy carbon electrode (GCE) surface was first investigated using the conventional 1 mM K₃[Fe(CN)₆] model complex. The performance of the GN(ZnO)-NC modified glassy carbon electrode (GCE) was evaluated in relation to varying concentrations of p-nitrophenol (p-NP). Employing square wave adsorptive stripping voltammetry, a significantly increased current response was recorded in a 0.1 M phosphate buffer solution at pH 6.8. Under optimized conditions, the method exhibited a linear response toward para-nitrophenol (p-NP) over the concentration range of 0.09 × 10⁻⁶ to 21.80 × 10⁻⁶ M, with a notably low detection limit of 8.8 × 10⁻⁹ M. These results were obtained using a deposition potential of –1.0 V and a deposition time of 300 s. With no interference from other potential interfering compounds like ortho-NP, meta-NP, or 2, 4-di-NP, this developed electrochemical sensor exhibited exceptional selectivity toward para-nitrophenol (p-NP). Owing to its high recovery rates, the method proved effective for the sensitive quantification of p-NP in real environmental samples, including ground and river water samples.</div></div>","PeriodicalId":21926,"journal":{"name":"South African Journal of Chemical Engineering","volume":"56 ","pages":"Article 100830"},"PeriodicalIF":0.0,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146189635","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Experimental design and optimization of process parameters for nanocellulose extraction from pineapple leaves using central composite design","authors":"Ebise Getacho Bacha ,&nbsp;Abeba Negawo Tadesse ,&nbsp;Martha Zemedu Assefa","doi":"10.1016/j.sajce.2026.01.007","DOIUrl":"10.1016/j.sajce.2026.01.007","url":null,"abstract":"<div><div>The yield of nanocellulose is affected by different parameters, including acid concentration, reaction time, temperature, and the acid-to-fiber ratio. This work aims to extract nanocellulose from pineapple leaves and optimize the process parameters using a central composite design. The chemical composition of pineapple leaf waste was determined using standard methods, and the obtained results were 66.36±0.31 %, 19.84±0.13 %, 7.8 ± 0.14 %, and 13.23±0.4 % for cellulose, hemicellulose, lignin, and extractives, respectively. The extraction was done by alkali treatment, delignification, and hydrochloric acid hydrolysis. The time, temperature, acid concentration, and the ratio of acid to feedstock were studied by response surface methodology. The optimum yield was 76.2 % at 42.5 min, 60.5 ℃, 4 M, and 1 to 20 g/ml for reaction time, temperature, acid concentration, and feedstock to acid solution ratio, respectively. The functional group, particle size distribution, crystallinity, and thermal stability were determined using Fourier-Transform Infrared Spectroscopy (FTIR), Dynamic Light Scattering (DLS), X-ray Diffraction (XRD), and Thermogravimetry Analysis (TGA), respectively. The average particle size was found to be 23.87 nm with a polydispersity index of 0.7. The FTIR results confirm the significant reduction or complete removal of lignin, hemicellulose, and other amorphous parts found in pineapple leaf. The Crystallinity Index (CI) of pineapple leaf is 40.6 %, cellulose is 60.7 %, and nanocellulose is 80.4 %, respectively. The thermogravimetry analysis shows that the thermal stability of the nanocellulose is better than that of the pineapple leaf.</div></div>","PeriodicalId":21926,"journal":{"name":"South African Journal of Chemical Engineering","volume":"56 ","pages":"Article 100834"},"PeriodicalIF":0.0,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146038954","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A modified time increment Monte Carlo based optimization framework for PSD dynamics in poly(methyl) methacrylate suspension polymerization","authors":"Naeem Bayaksud,&nbsp;Badril Azhar,&nbsp;Hurina Urfan Arissunarso,&nbsp;Sumarno","doi":"10.1016/j.sajce.2026.100843","DOIUrl":"10.1016/j.sajce.2026.100843","url":null,"abstract":"<div><div>Stochastic evolution of the particle size distribution (PSD) in poly(methyl methacrylate) suspension polymerization is influenced by the transient equilibrium between turbulent breakage and coalescence. A high-fidelity Constant Number Event Driven Monte Carlo framework resolves these dynamics by explicitly coupling conversion-dependent thermophysical properties specifically viscosity amplification and dynamic interfacial tension to hydrodynamics inspired kernels. Bayesian optimization via a Tree structured Parzen Estimator minimizes a composite loss function of Mean Squared Error and Earth Mover’s Distance ensuring high fidelity topological fits across the 10–150 µm domain. Experimental data at 700–900 rpm and 0.1–0.3 wt% PVA reveal a Sauter mean diameter (d₃₂) range of 30.9–67.0 µm with peak refinement (30.9 ± 15.1 µm) achieved at 900 rpm and 0.2 wt% PVA. The framework reproduces mass weighted PSDs with Root Mean Square Errors (RMSE) consistently below 0.073 and a minimum of 0.036. Kinetic parameters optimized at a single intermediate speed (800 rpm) successfully predict PSD evolution at uncalibrated hydrodynamic boundaries (700 and 900 rpm) with less than 4% RMSE deviation. Sensitivity analysis of agitation speed perturbations (±5% to ±20%) demonstrates that while RMSE increases from a baseline of 0.052 to a plateau of 0.078, the morphological shape of the PSD remains invariant, confirming the structural robustness of the mechanistic framework. These results provide a statistically validated platform for the rational design and hydrodynamic scale-up of poly(methyl methacrylate) suspension polymerization.</div></div>","PeriodicalId":21926,"journal":{"name":"South African Journal of Chemical Engineering","volume":"56 ","pages":"Article 100843"},"PeriodicalIF":0.0,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146189632","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Polynomial regression analysis on electromagnetohydrodynamic hybrid nanofluid flow over a rotating disk: Applications in next-generation thermal systems","authors":"Gunisetty Ramasekhar ,&nbsp;P.D. Selvi ,&nbsp;Hijaz Ahmad ,&nbsp;Waleed Mohammed Abdelfattah","doi":"10.1016/j.sajce.2025.12.010","DOIUrl":"10.1016/j.sajce.2025.12.010","url":null,"abstract":"<div><div>Thermal systems need effective cooling and heating processes, therefore thermal transfer innovation is critical in modern times, playing an important role in the manufacturing, aerospace, and electronic equipment sectors, in addition to automobiles and other modes of transportation. This study investigates the heat transfer properties of an electromagnetohydrodynamic mixed nanofluid across a porous spinning disk. The primary goal is to develop and validate an efficient engine oil/Cu-CuO hybrid framework that integrates traditional numerical approaches with polynomial regression analysis to accurately predict the flow and thermal features of complex nanofluid systems. The conversion of PDEs into ODEs is achieved by utilizing similarity variables. Thereafter, for graphical purposes, the study employed the bvp4c numerical method. The resultant structure is solved with the bvp4c scheme, and polynomial regression analysis is created to train the solution data for accurate estimation across different parameter (Q, Ec, Rd) settings. The suggested polynomial regression analysis has regression coefficients are 0.98, 0.87, 0.97, indicating high predicted accuracy and effectiveness. The influence of different parameters participating in the mathematical modeling is shown in various graphs and tables. In the result section the investigation noticed the velocity outlines increased, and on the other hand, there was a decreasing tendency in the energy outline for enlarging electric field parameter values. The heat generation and eckert number parameter values are increased, resulting in an improved energy profile. The results of this simulation have the potential to contribute significantly to more advanced study and research in the fields of bioengineering and bio-nanofluid dynamics.</div></div>","PeriodicalId":21926,"journal":{"name":"South African Journal of Chemical Engineering","volume":"55 ","pages":"Pages 605-617"},"PeriodicalIF":0.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145924089","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Manipulating calcination temperature on crystal structure and optical properties tuning of CuO nanostructures","authors":"Arrak Klinbumrung ,&nbsp;Reungruthai Sirirak ,&nbsp;Samor Boonphan ,&nbsp;Atit Wannawek ,&nbsp;Yanee Keereeta","doi":"10.1016/j.sajce.2026.01.002","DOIUrl":"10.1016/j.sajce.2026.01.002","url":null,"abstract":"<div><div>The research investigated the influence of calcination temperature on the properties of CuO nanostructures synthesized through a chemical precipitation method. Calcination at different temperatures (200, 400, and 600°C) significantly affected the crystal structure, morphology, and optical characteristics of the CuO nanostructures. Various characterization techniques were employed, including thermogravimetric analysis (TG), X–ray diffractometers (XRD), Fourier transform infrared spectrometers (FT–IR), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). TG analysis revealed thermal behavior and phase transitions, while XRD results confirmed a monoclinic structure of CuO at 200°C with the calculation of the texture coefficient, crystallite size, lattice constants, strain, and other physical properties. SEM images showed a transition from nanorods to plate structures with increasing calcination temperature. TEM images demonstrated the highly crystalline characteristics of CuO samples. The BET analysis depicted surface area reduction, and CuO nanostructures exhibited energy band gaps ranging from 2.23 to 2.78 eV. Calculating optical terms as a function of photon energy also examined optical behaviors. Photoluminescence spectra revealed oxygen and copper vacancy defects, which sublevels affected energy bandgap change. The 400CuO sample exhibited the strongest PL emission signal, indicating the highest crystallinity and the lowest degree of defects. The findings underscored the significant impact of calcination temperature on the morphology and optical properties of CuO nanostructures, providing insights into their structural characteristics and emerging defects. The study supports opto-electronic applications and contributes to the global goal of pollution control and clean water.</div></div>","PeriodicalId":21926,"journal":{"name":"South African Journal of Chemical Engineering","volume":"55 ","pages":"Pages 560-574"},"PeriodicalIF":0.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145924091","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Physicochemical properties of banana leaves at different growth stages: Effects of bleaching and natural dyeing with lac, butterfly pea, and turmeric","authors":"Sopida Wisansakkul ,&nbsp;Orawan Oupathumpanont","doi":"10.1016/j.sajce.2025.11.004","DOIUrl":"10.1016/j.sajce.2025.11.004","url":null,"abstract":"<div><div>This research aimed to study the impact of bleaching and natural dyeing on the physicochemical properties of banana leaves at various stages of growth. Banana leaves were bleached and dyed using three natural dyes: lac, butterfly pea, and turmeric. The bleaching process reduced the moisture content from 66.05 % to 11.98 %–15.50 % and decreased the thickness and opacity of the leaves, while glossiness was not significantly affected. EDS analysis identified carbon, oxygen, silicon, phosphorus, and potassium as the five main elements present after bleaching. The color values of the leaves changed noticeably; the a* value shifted toward red, and the b* value toward yellow. Six-month-old banana leaves were found to be most suitable for dyeing due to their structure and dye absorption properties. When dyed, lac produced a dark red tone (L* = 61.14, a* = 3.95, b* = -2.90), and butterfly pea yielded a blue-green shade (L* = 62.40, a* = -1.00, b* = -4.60), and turmeric resulted in an orange-yellow hue (L* = 68.41, a* = 8.79, b* = 7.19). These findings suggest the potential of using naturally dyed banana leaves as sustainable, biodegradable materials for creative product design, particularly in eco-friendly fashion and lifestyle items such as handbags and backpacks.</div></div>","PeriodicalId":21926,"journal":{"name":"South African Journal of Chemical Engineering","volume":"55 ","pages":"Pages 131-141"},"PeriodicalIF":0.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145517648","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Toxic metal adsorption from gold tailings wastewater using biowaste biochars: A circular economy approach","authors":"Abudu Ballu Duwiejuah","doi":"10.1016/j.sajce.2025.10.006","DOIUrl":"10.1016/j.sajce.2025.10.006","url":null,"abstract":"<div><div>Sustainable development of adsorbents from biowaste and their use for the treatment of wastewater is a circular economy approach. The study assessed the adsorption efficiency of biowaste biochars for heavy metal ions from gold tailings wastewater. Fourier transform infrared spectroscopy (FTIR) was employed to identify the functional groups and bond vibrations in the biowaste biochar. A total of 100 mL of the gold tailings wastewater was measured into a conical flask, and biowaste biochar dosage of 1.0, 2.0 and 3.0 g each was weighed and added, and then kept in a water bath at 30 °C and agitated at contact times of 20, 35 and 50 min. The corn cob biochar removes Cd (99.10 to 99.40%), Hg (90.50 to 93.80%), and Cr (15.60 to 75.60%) and Ni (21.30 to 84.50%), peanut shell biochar removes Cd (99.10 to 99.40%), Hg (90.60 to 93.80%), and Cr (19.10 to 77.80%) and Ni (35.50 to 85.30%) whilst sheanut shell biochar removes Cd (99.10 to 99.40%), Hg (89.40 to 93.80%), and Cr (8.90 to 73.30%) and Ni (35.50 to 87.10%). Corn cob biochar showed K<em>_F</em> for Cd (3.4 × 10¹¹ to 1.8 × 10¹⁷ mg/g), Hg (1.8 × 10⁶ to 8.0 × 10¹² mg/g), and Cr (0.01 to 1.4 mg/g) and Ni (0.1 to 0.03 mg/g). The corn cob biochar contains primary alcohol, alkane and carboxylic acids groups, peanut shell biochar contains aliphatic, tertiary alcohol, amine and secondary amines, and sheanut shell biochar contains aliphatic, primary alcohol, amine and carboxylic acids groups. The biochar dosage increases the cadmium, mercury, chromium, and nickel adsorption efficiency onto biowaste biochars. The dosage, porous surface, and time increase the adsorption efficiency of cadmium, mercury, chromium, and nickel significantly. The Freundlich model was the best fit model for cadmium and mercury adsorption onto the biochars due to the heterogeneous surface of the adsorbent, which makes it have a tougher binding site. Biowaste biochars demonstrated considerable potential for effectively removing heavy metal ions from gold tailings wastewater, making a valuable contribution to the circular economy and the remediation of environmental pollution.</div></div>","PeriodicalId":21926,"journal":{"name":"South African Journal of Chemical Engineering","volume":"55 ","pages":"Pages 83-91"},"PeriodicalIF":0.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145467801","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Computational modeling of peristaltic blood flow in a tapered channel with radiative heat flux and reaction mechanisms","authors":"S. Ravikumar ,&nbsp;Ali B.M. Ali ,&nbsp;Raghunath Kodi ,&nbsp;Ghulam Rasool ,&nbsp;Umid Turdialiyev ,&nbsp;Dilsora Abduvalieva ,&nbsp;M.Ijaz Khan ,&nbsp;Nidhal Ben Khedher","doi":"10.1016/j.sajce.2025.11.005","DOIUrl":"10.1016/j.sajce.2025.11.005","url":null,"abstract":"<div><div>The article demonstrates how computational methods help scientists study peristaltic blood flow and heat transport within biomedical systems. The present model uses peristaltic wave theory to build its framework while incorporating nonuniform boundary conditions. The channel walls show significant concurrence that matches real-world convective conditions. The established conditions enable researchers to study particle movement behavior which becomes essential for cardiac surgery applications. The mathematical model equations underwent transformation through lubrication techniques produced analytical solutions. The accuracy of present findings becomes evident through direct comparison with previously documented research results in scientific literature. The results match each other to a high degree. The hartmann number increase leads to an enhancement of fluid velocity according to this study. The hartmann number adjustment through external magnetic fields enables practical blood flow management which enhances medical device performance and drug delivery system accuracy. The Prandtl number decreases fluid velocity because viscous forces start to dominate thermal diffusivity. The relationship between these two parameters affects multiple fluid systems including blood flow in human bodies and various physical and biological systems. The heat transfer efficiency between conduction and convection increases when the heat biot number reaches higher values. The improved energy transfer leads to increased fluid velocity. The temperature profile shows significant changes because of thermal radiation effects. Medical biology depends on this parameter to optimize treatments through hyperthermia and study thermoregulation and create diagnostic and therapeutic equipment. The chemical reaction parameter strongly affects the concentration levels of the fluid. The knowledge of this relationship enables scientists to create improved therapeutic methods and enhance drug delivery systems and tissue engineering approaches. The chosen qualities are applicable in medical biology, biomechanics, heat exchangers, gas turbines, and several other fields.</div></div>","PeriodicalId":21926,"journal":{"name":"South African Journal of Chemical Engineering","volume":"55 ","pages":"Pages 142-161"},"PeriodicalIF":0.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145577223","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}