Showing papers by "Wan Ramli Wan Daud published in 2020"
TL;DR: Polyvinyl alcohol (PVA) is a biodegradable, water-soluble membrane that has low methanol permeation and reactive chemical functionalities as mentioned in this paper.
Abstract: Poly(vinyl alcohol) (PVA) is a biodegradable, water-soluble membrane that has low methanol permeation and reactive chemical functionalities. Modification of these features makes PVA an attractive p...
81 citations
TL;DR: In this article, the authors designed a new membrane for Microbial Fuel Cell (MFC) applications, where the membrane should have good proton conductivity, low oxygen permeability and anti-biofouling properties.
49 citations
TL;DR: In this paper, the effect of the operating voltage on the performance of a microbial electrolysis cell (MEC) equipped with both a bioanode and a biocathode for hydrogen production is reported.
43 citations
TL;DR: A commercial perfluorinated sulfonic acid (PFSA) membrane, Nafion, shows outstanding conductivity under conditions of a fully humidified surrounding as discussed by the authors, but it operates only at low temperature.
43 citations
TL;DR: A novel porous clay earthenware (NCE) was fabricated as the separator to replace the highly cost PEM in this study, and the MFC–PEM combination produced the lowest power density, CE and the highest internal resistance.
Abstract: A conventional reactor in microbial electrochemical technology (MET) consists of anode and cathode compartments divided by a separator, which is usually a proton exchange membrane (PEM), such as Nafion 117. In this study, a novel porous clay earthenware (NCE) was fabricated as the separator to replace the highly cost PEM. The fabrication of NCEs is with raw clay powder and starch powder that acts as a pore-forming agent at different starch powder contents (10 vol%, 20 vol%, and 30 vol%), ball-milled before hydraulically pressed to form green ceramic pellets and sintered up to 1200 °C. The highest power density of 2250 ± 21 mW/m2 (6.0 A/m2), the internal resistance of 75 ± 24 Ω and coulombic efficiency (CE) of 44 ± 21% were produced for MFC–NCE from 30 vol% starch powder content under batch mode operation. The MFC–PEM combination produced the lowest power density, CE and the highest internal resistance up to 1350 ± 17 mW/m2 (3.0 A/m2), 23 ± 15% and 326 ± 13 Ω, respectively.
29 citations
TL;DR: In this article, a decision support tool is developed to perform economic and environmental analyses of the future expansion of the palm oil industry, and the sequential steps in the modeling and optimization of the EFB value chain are discussed.
29 citations
TL;DR: In this article, a bimetal consisting of iron and cobalt supported with nitrogen-doped reduced graphene oxide (FeCo/NG) was successfully synthesised as a potential catalyst using a thermal annealing method for the oxygen reduction reaction (ORR).
26 citations
TL;DR: In this article, the authors derived tar from the gasification of cellulose and hemicellulose-rich coconut shell (CS) and lignin rich-palm kernel shell (PKS) using a downdraft fixed-bed reactor at 700°C-900°C.
25 citations
TL;DR: In this article, a 3D model with modified parallel flow field patterns is constructed, and simulation is performed to study the reactant distribution and cell performance, and numerical results show that modified parallel Flow Fields provide evenly distributed current density generation, where the reactionant is uniformly distributed in the flow field.
25 citations
TL;DR: In this article, the effect of using sulfosuccinic acid (SSA) and 4-sulfophthalic acid (SPTA) to crosslink the chitosan/poly(vinyl)alcohol (CS/PVA) composite membrane on the proton conduction properties for fuel cell applications was investigated.
11 citations
TL;DR: In this article, fuel cell Institute, Universiti Kebangsaan Malaysia, Bangi, Malaysia Department of Food Technology, Faculty of Industrial Technology, Universitas Ahmad Dahlan (UAD), Yogyakarta, Indonesia Department of Environmental Engineering, Institut Teknologi Yogakarta (ITY), YOGAKarta, INDIA Department of Chemical and Process Engineering, Faculty Of Engineering and Built Environment.
Abstract: Fuel Cell Institute, Universiti Kebangsaan Malaysia, Bangi, Malaysia Department of Food Technology, Faculty of Industrial Technology, Universitas Ahmad Dahlan (UAD), Yogyakarta, Indonesia Department of Environmental Engineering, Institut Teknologi Yogyakarta (ITY), Yogyakarta, Indonesia Department of Chemical and Process Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, Bangi, Malaysia Department of Biological Sciences and Biotechnology, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, Bangi, Malaysia Water Environment Research Centre, Korean Institute of Science and Technology, Seoul, Republic of Korea State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, China
TL;DR: In this article, Ni-Fe foam was applied as a cathode in dual-chamber BES, while effluent of glucose fermentation as a substrate in the anode side was analyzed by using field emission scanning electron microscopy.
Abstract: The high cost of Pt-based cathode, and its possibility of being poisoned by the presence of buffer in the electrolyte are two paramount issues in the BES system. The Ni-Fe has become one of the good alternatives because it has excellent catalytic properties, inexpensive, commercially available and low toxicity to microorganisms. In this study, Ni-Fe foam applied as a cathode in dual-chamber BES, while effluent of glucose fermentation as a substrate in the anode side. The characteristic of Ni-Fe surface was analyzed by using field emission scanning electron microscopy. Whereas, the catalytic property of Ni-Fe was evaluated by using linear sweep voltammetry test. The maximum hydrogen production rate and yield obtained were 500 ± 80 m3/m3/d and 470.2 ± 11.2 mL/g COD, respectively. The results show that the Ni-Fe has comparable performance to GF/Pt. Hence it could be used as an alternative cathode in BES application.
TL;DR: In this paper, a local algae strain, UKM2 Chlorella, was grown in a BPV under different trophic conditions and light wavelengths, and power generation by UKM 2 algae at the autotrophic mode in synthetic Bold's Basal Media (BBM) under white, blue and red lights were tested.
Abstract: A biophotovoltaic cell (BPV) is an electrobiochemical system that utilises a photosynthetic microorganism for instance
is algae to trap sunlight energy and convert it into electricity. In this study, a local algae strain, UKM2 Chlorella
sp. was grown in a BPV under different trophic conditions and light wavelengths. Once the acclimatisation phase
succeeded, and biofilm formed, power generation by UKM2 algae at the autotrophic mode in synthetic Bold’s Basal
media (BBM) under white, blue and red lights were tested. Polarisation and power curves were generated at these
different conditions to study the bioelectrochemical performance of the system. Later, the condition switched to algal
mixotrophic nutritional mode, with palm oil mill effluent (POME) as substrate. Maximum power generation obtained
when using UKM2 in BBM under red light where a power density of 1.19 ± 0.16 W/m3
was obtained at 25.74 ± 3.89
A/m3
current density, while the open circuit voltage OCV reached 226.08 ± 8.71 mV. UKM2 in POME under blue light
recorded maximum power density of 0.85 ± 0.18 W/m3 at current density of 16.75 ± 3.54 A/m3
, while the OCV reached
214.05 ± 23.82 mV. Chemical oxygen demand (COD) removal reached an efficiency of 35.93%, indicating the ability of
wastewater treatment and electricity generation in BPV at the same time
01 Jan 2020
TL;DR: In this article, the performance of SUS 316 L bipolar plates was evaluated using a single stack performance in PEMFC stack and the results showed that the corrosion resistant and high conductivity bipolar plates were applied to a single cell fabrication.
Abstract: Metallic bipolar plates tendency to have high contact resistance and corrosion after several times of usage affected
performance of a cell in PEMFC stack. Thisstudy focused on the interfacial contactresistance (ICR) and corrosion resistance
of SUS 316 L bipolar plates using Cr‒C and Nb‒C as coating layer, single stack performance in PEMFC were observed by
experimental. The Cr‒C and Nb‒C coating layer acted as protective layer between SUS 316 L bipolar plates. Therefore,
coating is a method in preventing the bipolar plates surface material from damage in the acidic environment of PEMFC. To
develop corrosion-resistant and high conductivity bipolar plates for PEMFC, the coatings bipolar plates were applied to
cell fabrication in comparison with bare SUS 316 L bipolar plates. The SUS 316 L bipolar plates size and electrode area
were 50 mm2 and 25 mm2
, respectively. The experiment was carried out on a prepared assembled single cell bipolar plates
with the commercial membranes, conductive carbon papers and gasket. Initial performance of the single cells using Cr‒C
and Nb‒C coatings over SUS 316 L bipolar plates were recorded at a cell voltage between 0.4 V to 0.5 V, respectively. In
comparison, Nb‒C gives good performance of corrosion resistance and the ICR value as low as 10‒12 A/cm2 and 1.22 mΩ
cm−2. Additionally, it gives maximum power density of 137 mW/cm2 at the cell voltage 0.51 V. The lifetime durability of the
single cell significantly improved from the uncoated current density of 390 mA/cm2
to 450 mA/cm2 with Nb‒C coating layer.
03 Dec 2020
TL;DR: The ever increasing energy consumption, rising public awareness for environmental protection, and higher prices of fossil fuels have motivated many to look for alternative and renewable energy sources as discussed by the authors, which has motivated many people to look towards alternative energy sources.
Abstract: The ever increasing energy consumption, rising public awareness for environmental protection, and higher prices of fossil fuels have motivated many to look for alternative and renewable energy sources [...]