This page has only limited features, please log in for full access.
Ultrafiltration membranes offer a progressive and efficient means to filter out various process fluids. The prime factor influencing ultrafiltration to a great extent is the porosity of the membranes employed. Regarding membrane development, alumina membranes are extensively studied due to their uniform porosity and mechanical strength. The present research work is specifically aimed towards the investigation of nanoporous alumina membranes, as a function of sintering parameters, on ultrafiltration performance. Alumina membranes are fabricated by sintering at various temperatures ranging from 1200–1300 °C for different holding times between 5–15 h. The morphological analysis, conducted using Scanning electron microscopy (SEM), revealed a homogeneous distribution of pores throughout the surface and cross-section of the membranes developed. It was observed that an increase in the sintering temperature and time resulted in a gradual decrease in the average pore size. A sample with an optimal pore size of 73.65 nm achieved after sintering at 1250 °C for 15 h, was used for the evaluation of ultrafiltration performance. However, the best mechanical strength and highest stress-bearing ability were exhibited by the sample sintered at 1300 °C for 5 h, whereas the sample sintered at 1250 °C for 5 h displayed the highest strain in terms of compression. The selected alumina membrane sample demonstrated excellent performance in the ultrafiltration of sugarcane juice, compared to the other process liquids.
Farooq Niazi; Malik Umer; Ashfaq Ahmed; Muhammad Hafeez; Zafar Khan; Muhammad Butt; Abdul Razzaq; Xian Luo; Young-Kwon Park. Nanoporous Alumina Membranes for Sugar Industry: An Investigation of Sintering Parameters Influence onUltrafiltration Performance. Sustainability 2021, 13, 7593 .
AMA StyleFarooq Niazi, Malik Umer, Ashfaq Ahmed, Muhammad Hafeez, Zafar Khan, Muhammad Butt, Abdul Razzaq, Xian Luo, Young-Kwon Park. Nanoporous Alumina Membranes for Sugar Industry: An Investigation of Sintering Parameters Influence onUltrafiltration Performance. Sustainability. 2021; 13 (14):7593.
Chicago/Turabian StyleFarooq Niazi; Malik Umer; Ashfaq Ahmed; Muhammad Hafeez; Zafar Khan; Muhammad Butt; Abdul Razzaq; Xian Luo; Young-Kwon Park. 2021. "Nanoporous Alumina Membranes for Sugar Industry: An Investigation of Sintering Parameters Influence onUltrafiltration Performance." Sustainability 13, no. 14: 7593.
An ejector is a simple mechanical device that can be integrated with power generation or the refrigeration cycle to enhance their performance. Owing to the complex flow behavior in the ejector, the performance prediction of the ejector is done by numerical simulations. However, to evaluate the performance of an ejector integrated power cycle or refrigeration cycle, the need for simpler and more reliable thermodynamic models to estimate the performance of the ejector persists. This research, therefore, aims at developing a single mathematical correlation that can predict the ejector performance with reasonable accuracy. The proposed correlation relates the entrainment ratio and the pressure rise across the ejector to the area ratio and the mass flow rate of the primary flow. R141b is selected as the ejector refrigerant, and the results obtained through the proposed correlation are validated through numerical solutions. The comparison between the analytical and numerical with experimental results provided an error of less than 8.4% and 4.29%, respectively.
Hafiz Ali Muhammad; Hafiz Muhammad Abdullah; Zabdur Rehman; Beomjoon Lee; Young-Jin Baik; Jongjae Cho; Muhammad Imran; Manzar Masud; Mohsin Saleem; Muhammad Shoaib Butt. Numerical Modeling of Ejector and Development of Improved Methods for the Design of Ejector-Assisted Refrigeration System. Energies 2020, 13, 5835 .
AMA StyleHafiz Ali Muhammad, Hafiz Muhammad Abdullah, Zabdur Rehman, Beomjoon Lee, Young-Jin Baik, Jongjae Cho, Muhammad Imran, Manzar Masud, Mohsin Saleem, Muhammad Shoaib Butt. Numerical Modeling of Ejector and Development of Improved Methods for the Design of Ejector-Assisted Refrigeration System. Energies. 2020; 13 (21):5835.
Chicago/Turabian StyleHafiz Ali Muhammad; Hafiz Muhammad Abdullah; Zabdur Rehman; Beomjoon Lee; Young-Jin Baik; Jongjae Cho; Muhammad Imran; Manzar Masud; Mohsin Saleem; Muhammad Shoaib Butt. 2020. "Numerical Modeling of Ejector and Development of Improved Methods for the Design of Ejector-Assisted Refrigeration System." Energies 13, no. 21: 5835.
To enhance the potential application of naturally biodegradable polylactic acid (PLA)-based composites reinforced with magnesium alloy, anodized coatings between Mg and PLA were fabricated on AZ31 magnesium alloy rods. After anodizing (AO) at four different treatment times, the surface demonstrated a typical porous MgO ceramics morphology, which greatly improved the mechanical properties of composite rods compared to untreated pure Mg. This was attributed to the micro-anchoring effect, which increases interfacial binding forces significantly between the Mg rod and PLA. Additionally, the AO layer can also substantially improve the degradability of composite rods in Hank’s solution, due to good corrosion resistance and stronger bonding between PLA and Mg. With a prolonged immersion time of up to 30 days, the porous MgO coating was eventually found to be degraded, evolving to a comparatively smooth surface resulting in a decline in mechanical properties due to a decrease in interfacial bonding strength. According to the current findings, the PLA-clad surface treated Mg composite rod may hold promise for use as a bioresorbable implant material for orthopedic inner fixation.
Muhammad Shoaib Butt; Adnan Maqbool; Malik Adeel Umer; Mohsin Saleem; Rizwan Ahmed Malik; Ibrahim M. Alarifi; Hussein Alrobei. Enhanced Mechanical Properties of Surface Treated AZ31 Reinforced Polymer Composites. Crystals 2020, 10, 381 .
AMA StyleMuhammad Shoaib Butt, Adnan Maqbool, Malik Adeel Umer, Mohsin Saleem, Rizwan Ahmed Malik, Ibrahim M. Alarifi, Hussein Alrobei. Enhanced Mechanical Properties of Surface Treated AZ31 Reinforced Polymer Composites. Crystals. 2020; 10 (5):381.
Chicago/Turabian StyleMuhammad Shoaib Butt; Adnan Maqbool; Malik Adeel Umer; Mohsin Saleem; Rizwan Ahmed Malik; Ibrahim M. Alarifi; Hussein Alrobei. 2020. "Enhanced Mechanical Properties of Surface Treated AZ31 Reinforced Polymer Composites." Crystals 10, no. 5: 381.