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Indonesia Natural Zeolite as Heterogeneous Catalyst for Biodiesel Production Bachrun Sutrisno1,a, MUHAMMAD Alif1,b, GENTA Zikriani1,c, ARIF Hidayat1,d* 1Chemical Engineering Department, Universitas Islam Indonesia, Indonesia abachrun.sutrisno@uii.ac.id, b16521016@students.uii.ac.id, c16521033@students.uii.ac.id, d*arif.hidayat@uii.ac.id Keywords: Indonesia Natural Zeolite, Heterogeneous Catalyst, Biodiesel Production, Kapok Seed Oil Abstract.
However, the use of homogeneous catalyst has many drawbacks, such as requiring advance process for product purification, further catalyst separation, and not reusable. the heterogeneous catalyst have been started to be developed in biodiesel production to eliminate limitations related to the homogeneous catalyst.
Forum, 382 (2018) 280-285.

Semarang 5 Malang 65145, Indonesia 2Centre of Advanced Materials for Renewable Energy, Universitas Negeri Malang, Jl.
Semarang 5 Malang 65145, Indonesia 3Department of Mechanical Engineering, Faculty of Engineering, Universitas Negeri Malang, Jl.
Xie, ZnO-Based Light-Emitting Diodes, Optoelectronics - Advanced Materials and Devices, S.
Farh, “ZnO Nanorods Prepared by Ultrasonic Spray Pyrolysis: Effect of Deposition Time on the Structural Morphological and Optical Properties,” Defect and Diffusion Forum 397 (2019) 88–100 [8] Y.
Neri, Sr- and Ni-doping in ZnO nanorods synthesized by a simple wet chemical method as excellent materials for CO and CO2 gas sensing, RSC Advances 6 (2016) 82733–82742 [17] Ba.

Lewis, in: Engineering with Ceramics, edited by R.
Thompson, in: Silicon Nitride Ceramics: Scientific and Technological Advances, edited by I-W.
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Shah1,g 1School of Engineering, The University of Warwick, Coventry, CV4 7AL, UK a*g.colston.1@warwick.ac.uk, barne.renz@warwick.ac.uk, ckushani-hapuhinna.perera@warwick.ac.uk, dp.m.gammon@warwick.ac.uk, emarina.antoniou@warwick.ac.uk, fP.A.Mawby@warwick.ac.uk, gvishal.shah@warwick.ac.uk Keywords: 3C-SiC, Epitaxy, Aluminum, Memory Effect, Doping Abstract.
Canino et al., Ion implantation and activation of aluminum in bulk 3C-SiC and 3C-SiC on Si, MRS Advances, 7 (2022) 1347
Bussel et al., Precise Control of Al Incorporation during CVD Growth of SiC Epilayers by Using Hydrogen Chloride, Materials Science Forum, 1062 (2022) 84

Study of page replacement algorithm based on Experiment Wang Hong Department of Computer Engineering WeiFang University, WeiFang, China wcjsdwf@126.com Keywords -- page replacement, page fault, FIFO, LRU, OPT.
The optimal algorithm can be implemented only if the full page reference stream is known in advance.
Beijing: Posts & Telecom Press ,Wu Xiaoming, Guo Yudong, ‘Computer Security’, Technology Forum

The typical engineering stress-strain curves of tensile test specimens cut from the Ti-6Al-4V alloy rods extruded at 1300ºC and with different holding times are shown in Fig. 4.
Łojkowski, Strengthening of a Ti–6Al–4V titanium alloy by means of hydrostatic extrusion and other methods, Materials Science and Engineering: A, 515 (2009) 43-48 [3] R.
Muddle, Low-temperature compaction of Ti–6Al–4V powder using equal channel angular extrusion with back pressure, Materials Science and Engineering: A, 490 (2008) 171-180 [4] D.
Bressiani, Production of Titanium Alloys for Advanced Aerospace Systems by Powder Metallurgy, Materials Research, 8 (2005) 443-446 [6] Y.
Key Engineering Materials, 520 (2012) 70-75 [8] M.

Samsudin, “Optimization on the Hybridization Ratio of Ground Granulated Blast Furnace Slag and High Calcium Wood Ash (GGBS – HCWA) for the Fabrication of Geopolymer Mortar,” Advanced Environmental Biology., vol. 9, no. 94, pp. 22–25, 2015, [Online].
Hamada et al., “Sustainable use of palm oil fuel ash as a supplementary cementitious material: A comprehensive review,” Journal of Building Engineering, vol. 40, no.
Ramli, “Mechanical and Durability Performance of Novel Self-activating Geopolymer Mortars,” Procedia Engineering, vol. 171, pp. 564–571, 2017, doi: 10.1016/j.proeng.2017.01.374
Mohammed, “Effects of Alkaline Solution on Properties of the HCFA Geopolymer Mortars,” in Procedia Engineering, 2016, vol. 148, pp. 710–717, doi: 10.1016/j.proeng.2016.06.581
Al Bakri, “Properties of fresh palm oil fuel ash based geopolymer material,” Advanced Environmental Biolology, vol. 7, no.

However, these alloys are not technologically advanced during pressure treatment, as they quickly harden under deformation [11-13].
Engineering & Technologies. 8(5) (2015) 636-645
Wang, Microstructure and mechanical properties of rare-earth-modified Al−1Fe binary alloys, Materials Science and Engineering: A. 632 (2017) 62-71
Nikiforov, Comparative analysis of properties of wires from alloys of al-rem system, obtained using the methods of continuous extrusion, International Journal of Engineering and Advanced Technology. 8(2) (2019) 300-304
Petersburg polytechnic university journal of engineering sciences and technology. 23(2) (2017) 109-126

Very advanced works have been done by Chenot, Fourment et al. from CEMEF in France and the corresponding software product FORGE® is largely used in the forging industry [7,8].
Simulation of axi-symmetrical forging process by Inverse Approach, Materials Science Forum Vols. 675-677 (2011) pp 1007-1010
“An Axisymmetric Inverse Approach for Cold Forging Modelling”, “Engineering Letters, Vol. 18, Issue 4, pp. 376-383, 2010

.: Materials Science Forum Vol.534-536 (2007), p. 1333-1336 [2] K.
Shintani et al.: Journal of the Society for Precision Engineering Vol.76 (2010), No.7 p. 809-813 [3] H.
Ohmori et al.: Advanced Ceramics Machining, CRC Press (2007), p. 147-178 [4] K.