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Abstract Topic: Energy and environment materials

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A proton-neutron QRPA Calculation of the β- Decay of Nd152 using the Fayans Energy Density Functional
Raden Oktova

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Corresponding Author
Raden Oktova

Institutions
Physics Education Dept., Faculty of Teaching and Education, Ahmad Dahlan University, Campus IV, Ring Road Selatan, Tamanan, Banguntapan, Bantul, Yogyakarta 55191, Indonesia

Abstract
This paper presents a calculation of the β- decay of the neutron-rich nucleus Nd152 using the proton-neutron Quasiparticle Random Phase Approximation (pn-QRPA) model. The single-particle ground states are calculated self-consistently using the Fayans energy density functional in a Hartree-Fock-Bogoliubov (HFB) scheme for deformed nuclei. The quasiparticle states which are needed for the pn-QRPA calculation are calculated from the HFB single-particle ground states using the Bardeen-Cooper-Schriefer (BCS) approximation. Only Gamow-Teller β- excitations are considered, and two kinds of excitation force are used to excite the daughter nucleus to produce the β- decay: (a) a pure Migdal force, and (b) a Migdal force plus a correction term obtained self-consistently from the BCS quasiparticle basis. The calculations with the pure Migdal force and the corrected Migdal force give half-lives of 5.92 min and 6.91 min, respectively, which are about one half of the experimental value of 11.6(7) min, and decay energies of 1.38 MeV and 1.33 MeV, respectively, both close to the experimental decay energy of 1.12 MeV. The correction to the Migdal excitation force turns out to improve the accuracy of the calculations.

Keywords
proton-neutron QRPA, β- Decay, Nd152, Fayans Energy Density Functional

Topic
Energy and environment materials

Link: https://ifory.id/abstract/hjzBRHcFguUn


Effect of Temperature and Residence Time Torrefaction Palm Kernel Shell On The Calorific Value and Energy Yield
Made Dirgantara1*, Karelius2, Budi Tri Cahyana3, Komang Gde Suastika1, Arief RM Akbar4

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Corresponding Author
Made Dirgantara

Institutions
1Department of Physics, University of Palangka Raya, Palangka Raya, Indonesia
2Department of Chemistery, University of Palangka Raya, Palangka Raya, Indonesia
3Industry Research and Standardization Center, Ministry of Industry, Indonesia
4Study Program of Agricultural Industry Technology, Lambung Mangkurat University, Indonesia

Abstract
Torrefaction is thermochemical processes to make biomass a fuel that has better properties, such as increased carbon content and calorific value. It is a temperature sensitive process which is effective between 200 0C and 300 0C in an inert environment with a residence time of 20-60 minutes. Palm kernel shell is one of the biomass that has the potential to be used as fuel, where its availability is abundant and has good physical properties. In this study of palm kernel shell torrefaction was carried out from 0.5 cm sieve with three variations in temperature and residence time follows 250 0C - 300 0C and 20-40 minutes. The results obtained are the increase in temperature and residence time causes an increase in the calorific value but relatively on energy yield because of a large mass loss at a temperature of 300 0C. The optimum process for torrefaction palm kernel shell according to calorific value and energy yield is 275 0C with residence time 30 minutes.

Keywords
calorific value, energy yield, residence time, temperature, torrefaction

Topic
Energy and environment materials

Link: https://ifory.id/abstract/ZhMtYpde2aAk


Environmental assessment of pre-feasibility of smart offshore NPP (ONPP) technology for indonesia: A-Review
Sigit Santosa, Khusnul Khotimah, Hanna Yasmine, Rusbani Kurniawan

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Corresponding Author
khusnul khotimah

Institutions
Center for Nuclear Standardization and Quality, National Nuclear Energy Agency, Indonesia

Abstract
Land needs for energy infrastructure needs, such as the construction of the planned NPP in Jepara, Central Java, often lead to conflicts with the communities because they consider the existence of this infrastructure will Cause environmental damage. One of the solutions studied to improve the development and move the nuclear power plant is to move the location of the nuclear power plant from land to offshore. Besides, Indonesia has a potentially special offshore site on the eastern Sumatra coastline, northern Java coastline, and the Kalimantan coastline. The purpose of this paper is to review the environmental aspects of the implementation of GBS Nuclear power plant in Indonesia. The method used is the review of the literature and subsequently conducted a descriptive analysis. The results showed that SMART offshore NUCLEAR power plants should be considered because it offers clean energy sources, improved safety aspects, availability of offshore sites, and better community of acceptance.

Keywords
environmental assessment, smart offshore NPP, technology

Topic
Energy and environment materials

Link: https://ifory.id/abstract/vQbJnEDKW7mX


Influence of Impulse-Electric Field on Dielectric Properties of Nerve Membranes
Kerista Tarigan, Timbangen Sembiring, Basuki Wirjosentono

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Corresponding Author
Kerista Tarigan

Institutions
Department of Physics, FMIPA, Universitas Sumatera Utara

Department of Chemistry, FMIPA, Universitas Sumatera Utara

Abstract
An investigational study of the impulse-electric field on an increase in the potential of nerve membranes, increased ion absorption of Na, K, Cl, has been conducted. The aim of this study is not only to observe the performance of the electric field as a source of energy but also to look the effective, efficient and non-thermally disabling, disinfecting the microorganisms. Based on the result of research, qualitatively with object of parasitic nematode, there is tenfold increase possibly in critical nervous membrane from normal potential, in intensity of electrical field of 13.33 – 18.66 kV/cm in angle, θ = 44.41˚, and comparative membrane dielectric decreased to 0.2, it led to dielectric rupture, non-active effects, and needs an energy only 0.64 mJ for twenty triggers, with condition of electrode potential of 6.3 kV.

Keywords
Impulse-electric field, nematode, nerve membranes

Topic
Energy and environment materials

Link: https://ifory.id/abstract/hZJW4TfYDk3a


Investigation electrical and thermoelectric properties of CuO Gd2O3
K. Boonin(a,b)*, K. Singsoog(c), T. Seetawan(c), J. Kaewkhao(a,b)

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Corresponding Author
Kitipun Boonin

Institutions
(a)Physics Program, Faculty of Science and Technology, NakhonPathomRajabhat University, NakhonPathom, 73000, Thailand
(b) Center of Excellence in Glass Technology and Materials Science (CEGM), Nakhon Pathom Rajabhat University, Nakhon Pathom 73000, Thailand
(c)Thermoelectric Research Laboratory, Center of Excellence on Alternative Energy, Research and Development Institution, Sakon Nakhon Rajabhat University, 680 Nittayo Rd. Mueang District, Sakon Nakon Province, 47000, Thailand

Abstract
In this work, CuGdO2 were prepared through the sintering of mixtures of CuO and Gd2O3 powders at 1373 K. The Seebeck coefficient and electrical resistivity were measured by ZEM-3 series in low pressure helium gas atmosphere at temperature ranges of 325520 K. The result shown that, electrical resistivity and power factor decrease with increasing of temperature while the power factor show the opposite trend. The power factor was calculated by P=S2/ (where S is Seebeck coefficient and  is electrical resistivity) and The highest value obtained for the power factor was 4.47 W1m1K2 at 520 K.

Keywords
n-type, CuAlO2, Thermoelectric properties

Topic
Energy and environment materials

Link: https://ifory.id/abstract/jwe8TzpQ2AKm


Optimization Ratio of Mixed Metal Soaps (Al-Ca) and Palm Fatty Acid Distillate (PFAD) on Making Grease
Sukmawati and Pratiwi Putri Lestari

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Corresponding Author
Sukmawati Sukmawati

Institutions
Department of Chemical Engineering, Institut Teknologi Medan, Jl. GedungArca No. 52, North Sumatera, 20217, Indonesia.

Abstract
Generally lubricants that are often found in the market are made from petroleum or petroleum base oil. With the depletion of petroleum reserves, the basic raw material for making lubricating oil is less, which can meet the needs of Indonesia. This is predicted to lead to scarcity of lubricants in the market or the increasingly expensive lubricants due to imports from abroad. Palm Fatty Acid Destilate (PFAD) has a high enough potential to be used as a raw material for oleochemical products, one of which is solid lubricant. This is due to the composition of the fatty acids found in PFAD not much different from the composition of fatty acids found in palm oil. This research aims to determine the formulation of solid lubricants (grease) from PFAD and compound (Al-Ca) metal soap as thickener which has the characteristics of approaching SNI solid lubricants and knowing the quality of the solid lubricants produced. The method used in making solid lubricants (grease) consists of two steps. The first step is the process of making mixed metal soap (Al-Ca) by mixing PFAD and Al(OH)3 - Ca(OH)¬2 and analyzing the mixed metal soap. The second stage is the manufacture of solid lubricants (grease) from mixed metal soap (Al-Ca) and PFAD and analyzes the products produced. Based on the research that has been done, the optimum solid lubricant that is in accordance with SNI standards is obtained in the composition A1: B1, A1 is the ratio of Al(OH)3:Ca(OH)2 = 90%:10% and B1 which is the ratio of metal soaps: PFAD = 10 %: 90%, so the density is 0,95 gr / ml and the penetration value is 194 (25 0C), the dropping point is 9710C and NLGI 4.

Keywords
Keywords: Mixed metal soap, solid lubricant (grease), base oil, NLGI

Topic
Energy and environment materials

Link: https://ifory.id/abstract/GnWxug3CUVEb


Optimizing plastic waste into fuel oil using pyrolysis induction thermal system for energy security in Indonesia with analyses of innovation efficiency: DEA approach
Khusnul Khotimah, Yanif Dwi Kuntjoro, Sigit Santosa, Citra Pertiwi

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Corresponding Author
khusnul khotimah

Institutions
BATAN
Universitas Pertahanan

Abstract
Indonesia is still far from having an ideal future energy security, which is indicated by energy inefficiency. In fact, the dependency on fossil energy became a barrier to optimize the energy sector. Therefore, to achieve energy security, Indonesia should manage its energy resources strategically. As a solution, it can be solved by utilizing plastic waste as a source of alternative fuel (pyrognate) through pyrolysis treatment. The approach of this research used mix method analysis to measure the utilization of the plastic waste into fuel oil pyrolysis with the design of a cracking reactor prototype using induction heating technology. The LDPE which has been used in this paper is 0.5 kg, also the stainless steel cylindrical reactor. Furthermore, the R&D efficiency results showed that the up and down pattern used in its score. It shows in the increasing of R&D efficiency start from 2009 with 0.891 and ended in escalated point with 1.00 efficiency score in 2016. The result showed that it has high energy efficiency due to fast start-up in the process causing low equipment cost (affordability), precision, and repeatability. With the right resolve, Indonesia will emerge to be stronger and more defensible in the realm of energy

Keywords
DEA, Energy Security, Fuel, Induction Heating, Plastic Waste

Topic
Energy and environment materials

Link: https://ifory.id/abstract/Q4bpydh8cZMK


Piezoelectric PVDF/CNT Flexible Applied on Motorcycle
Aphisak Kaeopisan (1), Hassakorn Wattanasarn (2)*

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Corresponding Author
Aphisak Kaeopisan

Institutions
(1,2) Program of Physics, Faculty of Science and Technology, Sakon Nakhon Rajabhat University, Sakon Nakhon, 47000, Thailand.

Abstract
For harvesting energy, mechanical energy converts to electrical energy using piezoelectric devices. In this study, piezoelectric flexible (PF) was synthesized form composite materials of polyvinylidene difluoride adding 1wt.% of carbon nanotube (PVDF-1wt.%CNT). The PVDF-1wt.%CNT size 0.5×30×100 mm3 and annealed at 60 ℃ for 1h. A copper tape was compressed for electrode on the top and bottom of the PF, poling at 6 kV mm–1 for 20 min. The results show that the piezoelectric coefficient (d33) maximum was 22 pC N–1. The 5 PF modules was fabricated to a device and attachment on a motorcycle coil spring compressor to investigate the generating electricity of the PF from mechanical energy. The motorcycle was tested using velocity at 50 km h–1 for 5 min run-on various surface road. The electricity from the PF modules were arranged using rectifier circuit installed motorcycle coil spring compressor, the output voltage was 3, 3.3, and 4 V for asphalt, cement, and gravel road, respectively. It expected that the harvesting energy devices using piezoelectric flexible is useful to apply on a motorcycle for generated electricity.

Keywords
PVDF; CNT; Composites; Harvesting energy; Mechanical energy

Topic
Energy and environment materials

Link: https://ifory.id/abstract/P7ZRdMewxKTk


PRODUCTION OF BIODIESEL FROM RUBBER SEED OIL USING HETEROGENEOUS ACID CATALYST PRODUCE FROM RICE WASHING WASTEWATER
C. E. Rustana (a*), H. Dianhar (b), Sunaryo (a), D. Junia (a*), D. S. Nurwulan (a), C. Darmanto (a), G. Santika (b), I. N. Darmawan (b)

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Corresponding Author
Denawati Junia

Institutions
a) Jurusan Fisika, Universitas Negeri Jakarta, Jl. Rawamangun Muka, RT.11/RW.14, Rawamangun, Kec. Pulo Gadung, Kota Jakarta Timur, Daerah Khusus Ibukota Jakarta 13220, Indonesia
*ce.rustana[at]yahoo.com
*denawati.junia[at]gmail.com
b) Jurusan Kimia, Universitas Negeri Jakarta, Jl. Rawamangun Muka, RT.11/RW.14, Rawamangun, Kec. Pulo Gadung, Kota Jakarta Timur, Daerah Khusus Ibukota Jakarta 13220, Indonesia

Abstract
One of the obstacles in utilization of rubber seed oil as a raw material for biodiesel production is contain of high free fatty acid about 12.19%. The process of biodiesel production from rubber seed oil would be more effective and efficient if done through a process of esterification and transesterification using heterogeneous acid catalyst because it is less corrosive, easily separated, and can reduce environmental pollution. However, the catalyst is relatively expensive. Therefore, it needs more economic alternatives. One of which is a heterogeneous acid catalyst from rice water. There are three production process, extracting the oil from seeds, catalyst preparation, and biodiesel production. The results of Biodiesel product contains methyl ester compounds of palmitic acid and oleic acid after going through transesterification process which means that the reaction was run. The EDS test results reported an SO3 group as part of a cluster -SO3H of catalyst from rice water.

Keywords
Biodiesel; Heterogenous Catalyst Acid; Rice Water; Rubber Seed Oil

Topic
Energy and environment materials

Link: https://ifory.id/abstract/8gNWPHdAc7eU


Seebeck coefficient and electrical resistivity of CuEuO2 n-type semiconductor
P. Yamchumporn, K. Boonin, K. Singsoog, T. Seetawan, J. Kaewkhao

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Corresponding Author
Peerapong Yamchumporn

Institutions
Physics Program, Faculty of Science and Technology, NakhonPathomRajabhat University, NakhonPathom, 73000, Thailand

Center of Excellence in Glass Technology and Materials Science (CEGM), Nakhon Pathom Rajabhat University, Nakhon Pathom 73000, Thailand

Thermoelectric Research Laboratory, Center of Excellence on Alternative Energy, Research and Development Institution, Sakon Nakhon Rajabhat University, 680 Nittayo Rd. Mueang District, Sakon Nakon Province, 47000, Thailand

Abstract
Abstract. In this work, Eu2O3 was replaced the Al site in CuAlO2 structures. The CuEuO2 was prepared by conventional solid-state reaction method. The Seebeck coefficient and electrical resistivity were measured by ZEM-3 series in low pressure helium gas atmosphere at temperature ranges of 315-521 K. It was found that, both electrical resistivity decrease with increasing of temperature while Seebeck coefficient and power factor show the opposite trend. The power factor was calculated by P=S2/ρ (where S is Seebeck coefficient and ρ is electrical resistivity) and exhibit highest value about 28 μW^(−1) m^(−1) K^(−2) at 521 K.

Keywords
Solid-state reaction, Seebeck coefficient, Power factor

Topic
Energy and environment materials

Link: https://ifory.id/abstract/mbPytk39GqvX


Thermoelectric Properties of BiTe
Faisal Fikri Oktaviantoni a, Kunchit Singsoog b, Melania Suweni Muntini a and Tosawat Seetawan b,c*

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Corresponding Author
Tosawat Seetawan

Institutions
a Instrumentation and Electronic Laboratory, Department of Physics, Institut Teknologi Sepuluh Nopember, Arief Rachman Hakim Rd, Surabaya, 60111 East Java Indonesia
b Thermoelectric Research Laboratory, Center of Excellence on Alternative Energy, Reseach and Development Institution, Sakon Nakhon Rajabhat University, 680 Nittayo Rd, Mueang District, Sakon Nakhon 47000, Thailand
c Program of Physics, Faculty of Science and Technology, Sakon Nakhon Rajabhat University, 680 Nittayo Rd, Mueang District, Sakon Nakhon 47000, Thailand

Abstract
Research on crystal structures and thermoelectric properties has been carried out using BiTe material. The sintering method used is hot press. Hotpress pressure comes from the bottom up. Temperature variations used in hotpress are 400, 450 and 500°C. Analysis of crystal structure used XRD. Based on the XRD results, the result is that the crystal structure of BiTe bulk is hexagonal. Thermoelectric properties measurements used ZEM-3. The sample is measured in a temperature range of 50-200°C. Based on the measurements, the sample with hot press 500°C has the highest Seeback coefficient and power factor values which are -71 uV/K and 3.6 x 10-4 W/mK^2, respectively. The sample has the best performance at room temperature and has decreased performance with increasing temperature. While the best electrical resistivity value is owned by the sample with hot press 450°C with a value of 1.28 mΩ cm at room temperature. Overall, the higher the temperature used when sintering, the better the performance produced. Thus, the BiTe material can be considered as a thermoelectric material.

Keywords
Harvesting Energy, Thermoelectric technology, Bismuth Telluride

Topic
Energy and environment materials

Link: https://ifory.id/abstract/QWPc6vLAjGCY


Thermoelectric Properties of Co-doped Ag and Bi on MnSi1.75
Kunchit Singsoog (a*) and Tosawat Seetawan (b)

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Corresponding Author
Kunchit Singsoog

Institutions
a) Thermoelectric Research Laboratory, Center of excellence on Alternative Energy, Research and Development Institute, Sakon Nakhon Rajabhat University, 680 Nittayo Road, Mueang District, Sakon Nakhon, 47000, Thailand.
*kunchitsingsoog[at]yahoo.com
b) Program of Physics, Faculty of Science and Technology, Sakon Nakhon Rajabhat University, 680 Nittayo Road, Mueang District, Sakon Nakhon, 47000, Thailand.

Abstract
The Mn1-xAgxSi1.75-yBiy (x = y = 0, 0.01, 0.02, 0.03, 0.04, and 0.05) materials were synthesized by ball milling and hot press method. The crystal structure and thermoelectric properties were analyzed it was found that the XRD patterns of all samples show mixes phase between MnSi1.75 for main phase of tetragonal structure and MnSi for secondary phase. The relative density of all samples were higher than 92%, indicating a good method for preparing high density samples. The Seebeck coefficient (S) and electrical resistivity of Ag and Bi doped Mn1-xAgxSi1.75-yBiy can be increased. The highest of S value and power factor at 673 K revealed that Mn0.98Ag0.02Si1.73Bi0.02 sample were about 119 V K-1 and 3.97 × 10-5 Wm-1K-2, respective. The highest power factor gave higher values than non-doped about 45.35 %. The Mn0.98Ag0.02Si1.73Bi0.02 sample is the most suitable for p-type of thermoelectric device fabrication.

Keywords
Thermoelectric; Generator; Refrigeration; Manganese silicide

Topic
Energy and environment materials

Link: https://ifory.id/abstract/ALreJXhEqdVg


Thermoelectric Properties of SbTe
Najma Zahiroh Sahdianingruma, Kunchit Singsoogb, Melania Suweni Muntinia and Tosawat Seetawanb,c*

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Corresponding Author
Tosawat Seetawan

Institutions
a Instrumentation and Electronic Laboratory, Department of Physics, Institut Teknologi Sepuluh Nopember, Arief Rachman Hakim Rd, Surabaya, 60111 East Java Indonesia
b Thermoelectric Research Laboratory, Center of Excellence on Alternative Energy, Reseach and Development Institution, Sakon Nakhon Rajabhat University, 680 Nittayo Rd, Mueang District, Sakon Nakhon 47000, Thailand
c Program of Physics, Faculty of Science and Technology, Sakon Nakhon Rajabhat University, 680 Nittayo Rd, Mueang District, Sakon Nakhon 47000, Thailand

Abstract
From the research to determine the thermoelectric properties and crystal structure of SbTe material synthesized by ball mill at 350 rpm for 10 hours and sintered with hot press. The hot press method was varied at the time of hot press for 1, 2 and 3 hours. The hot press temperature is 400 °C with a pressure of 25 MPa. Then all materials were tested by XRD and ZEM 3. Based on the XRD test performed, all materials had hexagonal crystal structures. From ZEM 3 measurement known that the best thermoelectric properties value is in sample 3 which has an electrical resistivity 0.35 mΩ cm at 331 K, Seebeck coefficient 147 uV/K at 473 K and power factor 4.53 mW/mK^2 at 331 K.

Keywords
Harvesting Energy, Thermoelectric technology, Antimony Telluride

Topic
Energy and environment materials

Link: https://ifory.id/abstract/Yx7tHEXDRGnz


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