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Synthesis and applications of inverse vulcanized polysulfides from bio-crosslinkers

Materials Today: Proceedings 2022年 57卷 1095-1100页

作者： Nayeem, Abdullah Ali, Mohd Faizal Shariffuddin, Jun Haslinda College of Engineering Universiti Malaysia Pahang Gambang263000 Malaysia Faculty of Chemical & Process Engineering Technology Universiti Malaysia Pahang Gambang26300 Malaysia

Elemental sulfur, an industrial by-product from petroleum industries worldwide, has drawn sufficient attention to researchers. The limited scope of application has caused a colossal surplus amount of elemental sulfur stacked in the open places. Several polysulfide synthesis processes, including condensation, free-radical process, and ionic copolymerization technique, were used but resulted in unstable products. A new polymerization technique, termed inverse vulcanization, has been introduced, which enabled different types of crosslinkers for polysulfide production and their scopes to explore numerous applications. The current paper concisely reviews the evolution and advances of using vegetable oils and plant extracts in inverse vulcanization to produce polysulfides. The alluring applications and properties have also been discussed briefly. © 2021

关键词： Sulfur

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Identification, Quantification, and Elimination of NOx and NH3 Impurities for Aqueous and Li-Mediated Nitrogen Reduction Experiments

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ACS ENERGY LETTERS 2023年第8期8卷 3614-3620页

作者： Izelaar, Boaz Ripepi, Davide van Noordenne, Dylan D. Jungbacker, Peter Kortlever, Ruud Mulder, Fokko M. Large Scale Energy Storage Process and Energy Department Faculty of Mechanical Maritime and Materials Engineering Delft University of Technology 2628 CB Delft The Netherlands Materials for Energy Conversion and Storage Chemical Engineering Department Faculty of Applied Sciences Delft University of Technology 2629 HZ Delft The Netherlands

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Evaluation of biohydrogen production from rice straw hydrolysate via Clostridium sp. YM1: In-lab fermentation and techno-economic study

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International Journal of Hydrogen Energy 2025年 138卷 1228-1238页

作者： Mahmod, Safa Senan Krisna, Rohindran Shukor, Hafiza Abdul, Peer Mohamed AL-Rajabi, Maha Mohammad Atabani, A.E. Luthfi, Abdullah Amru Indera Gunny, Ahmad Anas Nagoor Faculty of Chemical Engineering & Technology Universiti Malaysia Perlis UniMAP Perlis Arau02600 Malaysia Centre of Excellence for Biomass Utilization Universiti Malaysia Perlis UniMAP Perlis Arau02600 Malaysia Micron Memory Malaysia Sdn Bhd Bandar Cassia Penang 14110 Malaysia Department of Chemical and Process Engineering Faculty of Engineering and Built Environment Universiti Kebangsaan Malaysia UKM Selangor Bangi43600 Malaysia Faculty of Engineering and Built Environment Universiti Kebangsaan Malaysia Selangor Bangi43600 Malaysia Green Technology Research Center Yuan Ze University Taiwan

This study investigates the potential of rice straw (RS) to be used as a feedstock for the production of biohydrogen (BioH2). To simplify the structure of the RS, thermochemical treatment is applied using HNO3 and NaOH at different concentrations. At a concentration of 1% (v/v) nitric acid (HNO3), the highest sugar concentration achieved was 27.73 g/L. This condition was utilized in dark fermentation with Clostridium sp. YM1 at 30 °C in an anaerobic environment, resulting in a biohydrogen production that surpasses the yield of the control sample by 27%. Furthermore, supplementation of 20 mg of ferrous and magnesium ions enhanced the biohydrogen yield (HY), which achieved 1.12 molH₂/molsugar and 1.19 molH₂/molsugar, respectively. This study demonstrated that butyric acid fermentation was the main pathway for Clostridium sp. YM1 to produce BioH2 from HNO3-treated RS. The findings were further evaluated for their economic profitability using SuperPro designer in batch production mode to treat 100 kgRS/batch that demonstrated the feasibility of the project with payback period (PBP), and net present value (NPV) of 3.78 years and USD 4,722,929, respectively. The study herein provides valuable insights and recommendations aimed at enhancing the feasibility of the conversion of RS into BioH2, thereby advancing the potential for sustainable bioenergy production. © 2024

关键词： Metal ions

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Special Issues of chemical and process engineering In Memory of Professor Jerzy Baldyga

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chemical and process engineering - Inzynieria Chemiczna i Procesowa 2021年第2期42卷 73-74页

作者： Molga, Eugeniusz Faculty of Chemical and Process Engineering Warsaw University of Technology Poland

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Graphene oxide-chitosan composite material as adsorbent in removing methylene blue dye from synthetic wastewater

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Materials Today: Proceedings 2022年 64卷 1587-1596页

作者： Bryan, M.Y.K. Chai, P.V. Law, J.Y. Mahmoudi, E. Department of Chemical & Petroleum Engineering Faculty of Engineering Technology & Built Environment UCSI University Cheras Kuala Lumpur 56000 Malaysia Process Engineering Technology Section Universiti Kuala Lumpur Malaysian Institute of Chemical and Bioengineering Technology Alor Gajah Melaka 78000 Malaysia Department of Chemical and Process Engineering Faculty of Engineering and Built Environment Universiti Kebangsaan Malaysia Bangi Selangor Darul Ehsan 43600 Malaysia Faculty of Engineering and Built Environment Universiti Kebangsaan Malaysia Bangi Selangor Darul Ehsan 43600 Malaysia

Graphene oxide (GO) and graphene oxide-chitosan (GO-C) were synthesized and its performance in removing methylene blue (MB) dye synthetic wastewater were evaluated. Characterization technique such as measurement of zeta potential and FITR were employed to examine the surface potential of the adsorbent and presence of functional group respectively. The adsorption of MB by GO and GO-C was favored at the alkaline condition and lower temperature. The optimum conditions for the adsorption of MB using GO and GO-C were pH 10, a contact time of 50 min, a temperature of 30 °C and a dosage of 1250 mg/L. GO-C demonstrated higher adsorption capacity and dye removal efficacy due to the presence of the secondary adsorption sites that were attributed to the cross-linking of chitosan with GO. GO-C achieved 99.36 % of dye sequestration in MB synthetic dye wastewater after optimization of all parameters had been performed. Spent GO and GO-C were regenerated efficiently using absolute ethanol. GO and GO-C retained 91.79% and 91.90% of MB dye sequestration, respectively, after three cycles of adsorption–desorption and therefore, proving that GO-based adsorbents have an excellent ability to regenerate and reuse in synthetic dye wastewater. © 2022

关键词： Chitosan

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Integrated System of Solid Oxide Fuel Cell and Ethanol Partial Oxidation: process Simulation and Heat Exchanger Network 6th

Integrated System of Solid Oxide Fuel Cell and Ethanol Parti...

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6th International on Clean Energy and Electrical Systems, CEES 2024

作者： Saebea, Dang Thanomjit, Chollaphan Arpornwichanop, Amornchai Patcharavorachot, Yaneeporn Interdisciplinary Centre for Decarbonisation & Green Energy Department of Chemical Engineering Faculty of Engineering Burapha University Chonburi20131 Thailand Center of Excellence in Process and Energy Systems Engineering Department of Chemical Engineering Faculty of Engineering Chulalongkorn University Bangkok10330 Thailand Department of Chemical Engineering School of Engineering King Mongkut’s Institute of Technology Ladkrabang Bangkok10520 Thailand

ISBN: (纸本)9789819757749

A solid oxide fuel cell (SOFC) fueled by reformate obtained from an ethanol partial oxidation (POX) was investigated regarding electrical and the thermal performances. Performance analysis was performed through Aspen Plus simulator. Gas compositions obtained from POX and SOFC were computed through the Gibbs free energy minimization method. Three voltage losses that include activation, ohmic and concentration losses was considered in an electrochemical model. Effects of operating parameters in both POX and SOFC on performance of SOFC-POX system were examined. From the simulation results, it was found that the suitable condition of POX was at the reformer temperature of 700 ℃ and oxygen to ethanol molar ratio of 0.1. While, the operating temperature of SOFC should be 900 ℃. Under these operating conditions, the maximum electrical and thermal efficiencies of 67.24% and 25.77%, respectively, can be achieved. Finally, the heat integration of the SOFC-POX system was considered using pinch analysis. The minimum cold utility is 88.1 kW while the hot utility is no need for this system. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2024.

关键词： Free energy

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Evaluation of Palm Oil Leaves Extracts as a Potential Environment Friendly Corrosion Inhibitor for Metals 2nd

Evaluation of Palm Oil Leaves Extracts as a Potential Enviro...

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2nd Energy Security and chemical engineering Congress, ESChE 2021

作者： Abdullah, Arman Banius, Euodia Sofian, Azizul Helmi Bin, Lum Wai Faculty of Chemical and Process Engineering Technology Universiti Malaysia Pahang Lebuhraya Tun Razak Pahang Gambang Kuantan26300 Malaysia

ISBN: (纸本)9789811944246

Carbon steel were used in various fields as it is economically affordable, environment friendly, highly durable and with high strength. However, carbon steel tends to corrode compared with other superior materials. Corrosion had brought negative effect to economic, health, safety, and also culture. One of the methods use in controlling the internal corrosion is by using the corrosion inhibitor. Inorganic corrosion inhibitor had long been used to suppress corrosion however they are toxic to health and also environment. Therefore, this research had been conducted to evaluate the potential of the corrosion inhibitor from palm oil leaves (POL) extract. The POL extract was extracted using Microwave Assisted Extraction method (MAE). After extraction, POL extract was sent to LC/MSQ-Tof analysis to test for active chemical component present. The presence of active component such as tannin, flavonoid and alkaloid help to inhibit corrosion. Corrosion inhibition testing were conducted by using weight loss method and electrochemical Tafel plot. SEM test show that carbon steel without inhibitor corrodes more than 90% compare with carbon steel coupon contain POL extract as an inhibitor. © 2023, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Palm oil

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Acrylonitrile Butadiene Styrene (ABS) membrane for Air Filtration 11

Acrylonitrile Butadiene Styrene (ABS) membrane for Air Filtr...

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11th Australasian Congress on Applied Mechanics, ACAM 2024

作者： Samarathunga, Imesha R. Epaarachchi, Jayantha Sethunga, G.S.M.D.P. Herath, Madhubhashitha Centre for Future Materials University of Southern Queensland Toowoomba Australia Department of Chemical and Process Engineering Faculty of Engineering University of Moratuwa Sri Lanka Department of Engineering Technology Faculty of Technological Studies Uva Wellassa University Sri Lanka

ISBN: (纸本)9781925627787

The amount of particulate matter emitted via anthropogenic activities is significantly increasing. Thus, a high percentage of the global human population suffers from airborne diseases. Hence, using membrane technologies for air purification is becoming more popular. ABS is recognised as an alternative material for conventional membrane manufacturing due to its economic viability, ease of processability, and convenience in forming less fouled membranes. This study investigated the effect of ABS polymer concentration of the dope solution, co-solvent, and thickness on the membrane characteristics. Eight experiments were conducted in three phases. ABS was varied in 15 wt%, 25 wt%, and 30 wt% with the solvent N, N-Dimethylformamide (DMF) in phase I. The effect of the membrane’s dry thickness on its properties was explored using three different thicknesses in phase II. In phase III of the experiment, DMF/acetone weight percentages were 74:1 and 74.9:0.1, respectively, while ABS was 25 wt%. Synthesized membranes were characterised using Scanning Electron Microscopy (SEM), Fourier transform Infrared spectroscopy (FTIR), water contact angle, mechanical properties, and Thermogravimetric analysis (TGA). The SEM images depicted membrane morphology when adding acetone to the dope solution. Pore sizes of all membranes were less than 1 µm. All FTIR spectrums have exhibited similar patterns, confirming the unchanged chemical bonds inside membranes. Tensile test results depict that when the polymer concentration of the dope solution increased from 15 wt% to 30 wt%, tensile strength increased from 1.78 MPa to 5.68 MPa, while the elongation increased by 6.83%. However, when the membrane thickness decreased from 0.56 mm to 0.13 mm, tensile strength was enhanced by 69%. Therefore, it can be concluded that ABS will be an excellent substitute material for membrane air filtration. © 2024 11th Australasian Congress on Applied Mechanics, ACAM 2024. All rights reserved.

关键词： Tensile strength

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Controlled release of niacinamide from fibrous silica nanocarrier in face serum formulation 6

Controlled release of niacinamide from fibrous silica nanoca...

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6th National Conference on Postgraduate Research, NCON-PGR 2022

作者： Fateha Binti Sukor, Nuramira Binti Jusoh, Rohayu Syahirah Binti Kamarudin, Nur Faculty of Chemical and Process Engineering Technology College of Engineering Gambang Kuantan Pahang26300 Malaysia

The current study offers controlled release of niacinamide from fibrous silica (KCC-1) loaded in a face serum formulation. Furthermore, three drug loading methods, namely physical mixing, melting, and solvent evaporation, denoted as (Phy)/Nia-KCC-1, (Mel)/Nia-KCC-1, and (Sol)/Nia-KCC-1, respectively, were implemented, and the percentage loading efficiencies were compared. (Mel)/Nia-KCC-1 demonstrated the highest percentage of drug loading at 33%, followed by (Phy)/Nia-KCC-1 and (Sol)/Nia-KCC-1 at 25% and 17%, respectively. Likewise, the in vitro release study also revealed a similar pattern, with (Mel)/Nia-KCC-1 recording the highest percentage release at 29%, followed by (Phy)/Nia-KCC-1 and (Sol)/Nia-KCC-1 at 24% and 21%, respectively. As the (Mel)/Nia-KCC-1 sample unveiled decent results in transporting the sample drug, the respective sample was then further loaded into the face serum formulation, and the pH stability was observed for 7 days. The pH readings remained constant at pH 4.3 throughout the 7 days, within the acceptance range according to the derma-cosmetic product that states the effective pH should lie between pH 4 and pH 6. Therefore, it can be stated that the (Mel)/Nia-KCC-1 loaded serum fulfills the acceptance criteria for the pH requirement of derma-cosmetic products. © 2022 Elsevier Ltd. All rights reserved.

关键词： Targeted drug delivery

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Biodegradable and Green Degreaser for Industrial Application: An Overview 3

Biodegradable and Green Degreaser for Industrial Application...

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3rd International Postgraduate Conference on Mechanical engineering 2024, IPCME 2024

作者： Cholis, Nur Razali, Mohd Najib Ramli, Najmuddin Mohd Sahran, Mohd Syahmi Iskandar Faculty of Manufacturing and Mechatronic Engineering Technology Universiti Malaysia Pahang Al-Sultan Abdullah Pekan Pahang26300 Malaysia Faculty of Chemical and Process Engineering Technology Universiti Malaysia Pahang Al-Sultan Abdullah Gambang Pahang26300 Malaysia Faculty of Engineering Universitas Pembangunan Nasional Veteran Jakarta Selatan Jakarta12450 Indonesia

This paper provides a comprehensive overview of biodegradable and green degreasers for industrial applications. Traditional degreasers, although effective in removing oils, grease, and residues, often pose significant environmental and health concerns due to the use of hazardous chemicals like volatile organic compounds (VOCs) and nonylphenol ethoxylates (NPEs). In response to increasing regulatory pressures and sustainability goals, biodegradable alternatives are gaining attention. These green degreasers utilize renewable materials, aligning with key Sustainable Development Goals (SDGs) related to environmental protection, climate action, and sustainable industrial practices. While these eco-friendly solutions offer promising performance and environmental benefits, challenges such as cost, awareness, and certification hinder widespread adoption. The review emphasizes the importance of continuous research, the need for standardization in biodegradability assessment, and innovations in biosurfactants and nanotechnology to improve the effectiveness of these products. Ultimately, biodegradable degreasers present a sustainable path forward for industries aiming to reduce their environmental impact and comply with evolving regulatory frameworks. © Published under licence by IOP Publishing Ltd.

关键词： Green development

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