Abstract
The ammonium manganese phosphate monohydrate (NH4MnPO4 · H2O) was found to decompose in three steps in the sequence of: deammination, dehydration and polycondensation. At the end of each step, the consecutive one started before the previous step was finished. The thermal final product was found to be Mn2P2O7 according to the characterization by X-ray powder diffraction (XRD) and Fourier transform infrared spectroscopy. Vibrational frequencies of breaking bonds in three stages were estimated from the isokinetic parameters and found to agree with the observed FTIR spectra. The kinetics of thermal decomposition of this compound under non-isothermal conditions was studied by Kissinger method. The calculated activation energies Ea are 110.77, 180.77 and 201.95 kJ mol−1 for the deammination, dehydration and polycondensation steps, respectively. Thermodynamic parameters for this compound were calculated through the kinetic parameters for the first time.
Similar content being viewed by others
References
Carling SG, Day P, Visser D. Crytal and magnetic structures of layer transition metal phosphate hydrates. Inorg Chem. 1995;34:3917–27.
Šoptrajanov B, Stefov V, Kuzmanovski I, Jovanovski G, Lutz HD, Engelen B. Very low H–O–H bending frequencies. IV. Fourier transform infrared spectra of synthetic dittmarite. J Mol Struct. 2002;613:7–14.
Frost RL, Weier ML, Erickson KL. Thermal decomposition of struvite. J Therm Anal Calorim. 2004;76:1025–33.
Lapina LM. Metal ammonium phosphates and their new applications. Russ Chem Rev. 1968;37:693–701.
Barros N, Airoldi C, Simoni JA, Ramajo B, Espina A, Garcia JR. Calorimetric determination of the effect of ammonium-iron (II) phosphate monohydrate on Rhodic Eutrudox Brazilian. Spectrochim Acta. 2006;441:89–95.
Erskine AM, Grim G, Horning SC. Ammonium ferrous phosphate: a pigment for metal protective paint finishes. Ind Eng Chem. 1944;36:456–60.
Vol’fkovich SI, Remen RE. Ammonium phosphates of magnesium, zinc and iron. Chem Abstr. 1956;50:6243.
Yuan A, Wu J, Bai L, Ma S, Huang Z, Tong Z. Standard molar enthalpies of formation for ammonium/3d-transition metal phosphates NH4MPO4 · H2O (M = Mn2+, Co2+, Ni2+, Cu2+). J Chem Eng Data. 2008;53:1066–70.
Onoda H, Nariai H, Moriwaki A, Maki H, Motooka I. Formation and catalytic characterization of various rare earth phosphates. J Mater Chem. 2002;12:1754–60.
Onoda H, Kojima K, Nariai H. Additional effects of rare earth elements on formation and properties of some transition metal pyrophosphates. J Alloys Compd. 2006;408:568–72.
Bian JJ, Kim DW, Hong KS. Microwave dielectric properties of Ca2P2O7. J Eur Ceram Soc. 2003;23:2589–92.
van Smaalen S, Dinnebier RE, Hanson J, Gollwitzer J, Büllesfeld F, Prokofiev A, et al. High temperature behavior of vanadyl pyrophosphate (VO)2P2O7. J Solid State Chem. 2005;178:2225–30.
Takita Y, Sano KI, Kurosaki K, Kawata N, Nishiguchi H, Ito M, et al. Oxidative dehydrogenation of iso-butane to iso-butene I. Metal phosphate catalysts. Appl Catal. 1998;A167:49–56.
Chung UC, Mesa JL, Pizarro JL, Jubera V, Lezama L, Arriortua MI, et al. Mn(HPO3): a new manganese (II) phosphite with a condensed structure. J Solid State Chem. 2005;178:2913–21.
Boonchom B, Youngme S, Maensiri S, Danvirutai C. Nanocrystalline serrabrancaite (MnPO4 · H2O) prepared by a simple precipitation route at low temperature. J Alloys Compd. 2008;454:78–82.
Noisong P, Danvirutai C, Srithanratana T, Boonchom B. Synthesis, characterization and non-isothermal decomposition kinetics of manganese hypophosphite monohydrate. Solid State Sci. 2008;10:1598–1604.
Fowlis DC, Stager CV. Antiferromagnetic resonance in Mn2P2O7. Can J Phys. 1972;50:2681–7.
Takita Y, Sano KI, Muraya T, Nishiguchi H, Kawata N, Ito M, et al. Oxidative dehydrogenation of iso-butane to iso-butene II. Rare earth phosphate catalysts. Appl Catal. 1998;170A:23–31.
Koleva VG. Metal–water interactions and hydrogen bonding in dittmarite-type compounds MIMIIPO4 · H2O (MI = K+, NH4 +; MII = Mn2+, Co2+, Ni2+): correlations of IR spectroscopic and structural data. Spectrochim Acta. 2005;62:1196–1202.
Boonchom B, Youngme S, Srithanratana T, Danvirutai C. Synthesis of AlPO4 and kinetics of thermal decomposition of AlPO4 · H2O–H4 precursor. J Therm Anal Calorim. 2008;19:511–6.
Kissinger HE. Reaction kinetics in differential thermal analysis. Anal Chem. 1957;29:1702–6.
Basset H, Bedwell WL. Studies of phosphates. Part I. Ammonium magnesium phosphate and related compounds. J Chem Soc. 1993:854–71.
Cullity BD. Elements of X-ray diffraction. 2nd ed. Menlo Park: Addison-Wesley Publishing; 1978. p. 120.
Vlaev LT, Nikolova MM, Gospodinov GG. Non-isothermal kinetics of dehydration of some selenite hexahydrates. J Solid State Chem. 2004;177:2663–9.
Vyazovkin S. Computational aspects of kinetic analysis. Part C. The ICTAC kinetics project—the light at the end of the tunnel? Thermochim Acta. 2000;355:155–63.
Zhang KL, Hong JH, Cao GH, Zhan D, Tao YT, Cong CJ. The kinetics of thermal dehydration of copper(II) acetate monohydrate in air. Thermochim Acta. 2005;437:145–9.
Flynn JH, Wall LA. A quick direct method for the determination of activation energy from thermogravimetric data. Polym Lett. 1966;4:323–8.
Ozawa TA. New method of analyzing thermogravimetric data. Bull Chem Soc Jpn. 1965;38:1881–6.
Coats AW, Redfern JP. Kinetic parameters from thermogravimetric data. Nature. 1964;20:68–70.
Van Krevelens DW, Hoftijzer PJ. Kinetics of gas−liquid reaction-general theory. Trans I Chem E. 1954;32:5360–83.
Iqbal M, Bhuiyan H, Mavinic DS, Koch FA. Thermal decomposition of struvite and its phase transition. Chemosphere. 2008;70:1347–56.
Chapman AC, Thirlwell LE. Spectra of phosphorus compounds—I the infrared spectra of orthophosphates. Spectrochim Acta. 1964;20:937–47.
Steger E, Käßner B. Die infrarotspektren von wasserfreien schwermetall-diphosphaten. Spectrochim Acta. 1968; 24A:447–56.
Harcharras M, Ennaciri A, Rulmont A, Gilbert B. Vibrational spectra and structures of double diphosphates M2CdP2O7 (M = Li, Na, K, Rb, Cs). Spectrochim Acta. 1997;A53:345–52.
Assaaoudi H, Butler IS, Kozinski J, Gariépy FB. Crystal structure, vibrational spectra and thermal decomposition of a new tetrazinc(II) dipyrophosphate decahydrate, Zn4(P2O7). J Chem Crystallogr. 2005;35:49–59.
Baril M, Assaaoudi H, Butler IS. Pressure-tuning Raman microspectroscopic study of cobalt(II), manganese(II), zinc(II) and magnesium(II) pyrophosphate dehydrates. J Mol Struct. 2005;751:168–71.
Boonchom B, Danvirutai D. Thermal decomposition kinetics of FePO4 · 3H2O precursor to synthetize spherical nanoparticles FePO4. Ind Eng Chem Res. 2007;46:9071–6.
Vlase T, Vlase G, Doca M, Doca N. Specificity of decomposition of solids in non-isothermal conditions. J Therm Anal Calorim. 2003;72:597–604.
Pop N, Vlase G, Vlase T, Doca N, Mogos A, Ioitescu A. Compensation effect as a consequence of vibrational energy transfer in homogeneous and isotropic heat field. J Therm Anal Cal. 2008;92:313–7.
Mianowski A, Marecka A. The isokinetic effect as related to the activation energy for the gases diffusion in coal at ambient temperatures Part I. Fick’s diffusion parameter estimated from kinetic curves. J Therm Anal Calorim. 2009;95:285–92.
Ioitescu A, Vlase G, Vlase T, Doca N. Kinetics of decomposition of different acid calcium phosphates. J Therm Anal Calorim. 2007;88:121–5.
Rooney JJ. Ering transition-state theory and kinetics in catalysis. J Mol Catal A. 1995;96:L1.
Boonchom B. Kinetics and thermodynamic properties of the thermal decomposition of manganese dihydrogenphosphate dihydrate. J Chem Eng Data. 2008;53:1533–8.
Vlaev L, Nedelchev N, Gyurova K, Zagorcheva M. A comparative study of non-isothermal kinetics of decomposition of calcium oxalate monohydrate. J Anal Appl Pyrol. 2008;81:253–62.
Acknowledgements
The authors would like to thank the Department of Chemistry, Faculty of Science and Department of Environmental Engineering (For XRD), Faculty of Engineering of Khon Kaen University for providing research facilities. The financial support from the Development and Promotion in Science and Technology Talents Project (DPST) and the Center of Excellence for Innovation in Chemistry (PERCH-CIC), Commission on Higher Education, Ministry of Education is gratefully acknowledged.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Danvirutai, C., Noisong, P. & Youngme, S. Some thermodynamic functions and kinetics of thermal decomposition of NH4MnPO4 · H2O in nitrogen atmosphere. J Therm Anal Calorim 100, 117–124 (2010). https://doi.org/10.1007/s10973-009-0017-4
Received:
Revised:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s10973-009-0017-4