THERMAL DECOMPOSITION KINETICS OF LANTHANUM OXALATE HYDRATE PRODUCT TREATMENT FROM MONAZITE
DOI:
https://doi.org/10.17146/jsmi.2019.20.2.5295Keywords:
kinetics, thermal decomposition, lanthanum oxalate hydrateAbstract
THERMAL DECOMPOSITION KINETICS OF LANTHANUM OXALATE HYDRATE PRODUCT TREATMENT FROM MONAZITE. Unreacted shrinking core model variation was developed for calcination and solid thermal decomposition reaction to non catalytic gas and no gas reactants were involved. In this research, thermal decomposition of lanthanum oxalate hydrate product treatment of monazite. The parameters for modeling are the time and temperature of thermal decomposition. The time was between 0 - 150 minutes with 30 minute intervals and the temperature range between 600 – 700 oC with 100 oC intervals. Based on the experimental data it can be concluded that the most suitable model was unreacted core sphere ash diffusion controls and obtained the relation between temperature T oC with diffusion coefficient D following equation D = 0.0011 T + 0.5175 with linearity R² = 0.9561. Another possible model was the sphere reaction control and obtained the relationship between 1 / T (K) and reaction rate constant ks was ks = 48873.e -4.88 / RT with activation energy = 4.88 kJ. The relationship between time t with rc (radius of particles at time t) at various temperatures and the relation between temperature and rc at various times follows the exponential line equation. If temperature and time parameters were combined will find the relation between time and temperature with rc following the equation ln rc = -0.9536 (9E-04 T + 0.005 T) + 4.9976.
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. L. Hu and M. Chen, “Preparation of ultrafine powder: The frontiers of chemical engineering,” J. Mater Chem Phys., vol. 43(3), pp. 212−219, 1996.
. X M. Wu, L. Wang, Z.C. Tan, G.H. Li, S.S. Qu, “Preparation characterization and low-tempera ture heat capacities of nanocrystalline TiO2 ul trafine powder,” J. Solid State Chem., vol. 156(1), pp. 220−224, 2001.
. D.S. Yan, “Synthesis and fabrication of nanostructured materials,” J. Inorg Mater., vol. 10(1), pp. 1−6, 1995.
. V.A. Murugan, S. C.Navale, V.Ravi, “Synthesis of nanocrystalline La2O3 powder at 100 °C,” J. Mater Lett., vol. 60(6), pp. 848−849, 2006.
. B A A. Balboul, Ei-Roudi A M. Samir E. Othman A G. “Non-Isothermal Studies of The Decompo sition Course Of Lanthanum Oxalate Decahydrate,” J. Thermochim Acta., vol. 387(2), pp. 109−114, 2002.
. Petryk J. Kolakowska E. “Cobalt oxide catalysts for ammonia oxidation activated with cerium and lanthanum,” J. Appl. Catal B., vol. 24(2), pp. 121−128, 2000.
. Schweizer T. Samson B N. Hector J R. Brock lesby W S. Hewak D W. Payne D N. “Infrared emission from holmium doped gallium lantha num sulphide glass,” J. Infrared Phys. Techn., vol. 40, pp. 329−335, 1999.
. Escudero M J. Novoa X R. Rodrigo T. Daza L. “Influence of lanthanum oxide as quality pro moter on cathodes for MCFC,” J. Power Sources, vol. 106(1−2), pp. 196−205, 2002.
. Chen Zhan-heng. “Rare earth new materials and their application in the field of high technology,” J. Chinese Rare Earths,vol. 21(1), pp. 53−57, 2001. (in Chinese)
. Zhang Ke-li. Chen Xiong-bin. XI Mei-yun. Song Li. Zhang Xiao-feng. SUN Ju-tang. Thermal de composition of lanthanum oxalate decahydrate,” J. Wuhan Univ., vol. 42(2), pp. 163−166, 1996. (in Chinese)
. Yang Q. Tang K B. Wang C R. Qian Y. Zhang S. “PVA-Assisted synthesis and characterization of CdSe and CdTe nanowires,” J. Phys Chem B., vol. 106(38), pp. 9227−9230, 2002.
. Bakiz B., Guinnetion F., Arab M., Benlhachemi A., Gavarria J R. “Elaboration characterization of LaOHCO3. La2O2CO3 and La2O3 phases and their gas solid interactions with CH4 and CO gases,” J. Condensed Matter, vol. 12(1), pp. 60−67, 2002.
. Tang J L., Pan T J., Chen M. “Synthesis of CdS nanoplates using poly (acrylic acid) as precursor by hydrothermal method,” J. Acta Chem Sinica. vol. 68(4), pp. 325−328, 2010.
. Zhang H., Yang D R., Li S Z., Ji Y J., Ma X Y., Que D L. “Hydrothermal synthesis of flower-like Bi2S3 with nanorods in the diameter region of 30 nm,” J. Nanotechnology, vol. 15(9), pp. 1122−1125, 2003.
. Reddy B M., Reddy G K., Khan A., Ganesh I. “Synthesis of monophasic Ce0.5Zr0.5O2 solid solu tion by microwave-induced combustion method,” J. Mater Sci., vol. 42(10), pp. 3557−3563, 2007.
. CHI Ru-an. XU Zhi-gao. WU Yuan-xin. WANG Cun-wen. “Optimal conditions for preparing ul tra-fine CeO2 powders in a submerged circulative impinging stream reactor,” J. Rare Earth, vol. 25(4), pp. 422−427, 2007.
. Amirpiran Amiria, Gordon, D. Ingram, Nicoleta E. Maynard, IztokLivkb and Andrey V. Bekker. “An Unreacted Shrinking Core Model for Calci nation and Similar Solid-to-Gas Reactions,” Chemical Engineering Communications, vol. 202. Issue 9, 2015.
. Zhan Guang, YU Jun-xia, XU Zhi-gao, ZHOU Fang, CHI Ru-an. “Kinetics of thermal decompo sition of lanthanum oxalate hydrate,” Transac tions of Nonferrous Metals Society of China, vol. 22, pp. 925−934, 2012.
. J.-C. Grivel, Y. Zhao, M.J. Suarez Guevara, A. Watenphul. “Studies on the thermal decomposi tion of lanthanum (III) valerate and lanthanum (III) cuprate in argon,” Thermochimica Acta., vol. 612, pp. 1–9, 2015.
. Xiang-hui ZHANG, Chuan HE, Ling WANG, Jing LIU, Miao DENG. “Non-isothermal kinetic analysis of thermal dehydration of La2(CO3)3.4H2O in air,” Transactions of Nonfer rous Metals Society of China, vol. 24(10). pp. 3378-3385, 2014.
. Amirpiran Amiria, Gordon D. Ingram, Andrey V., Bekker, IztokLivk, Nicoleta E., Maynard. “A multi-stage.multi-reaction shrinking core model for self-inhibiting gas–solid reactions,” Advanced Powder Technology, vol. 24(4) , pp. 728–736, 2013.
. Levenspiel O. Chemical Reaction Engineering. Dept of Chem. Engineering. Oregon State Uni versity. Wiley Eastern Ltd. New Delhi. Banga lore. Bombay. Calcutta. (1972).
. Tang W J. Liu Y W. Yang X. Wang C X. “Kinetic studies of the calcination of ammonium meta vanadate by thermal methods,” J. Ind Eng Chem Res., vol. 43(9), pp. 2054−2059, 2004. [24]. Yüksel Altaş, Hüseyin Tel. “Structural and ther mal investigations on cerium oxalate and derived oxide powders for the preparation of (ThCe)O2 pellets,” Journal of Nuclear Materials, vol. 298(3), pp. 316–320, 2001.
. Guo-Qiang Zhang, Tian-Yu Guo, Zhong LI. “Ef fect of calcination temperature on catalytic per formance of CuCe/AC catalysts for oxidative car bonylation of methanol,” Journal of Fuel Chem istry and Technology, vol. 44(6), pp. 674-679, 2016.
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