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Forgber T, Rehrl J, Matic M, Sibanc R, Sivanesapillai R, Khinast J. Experimental and numerical investigations of the RTD in a GEA ConsiGma CTL25 tablet press. POWDER TECHNOL 2022. [DOI: 10.1016/j.powtec.2022.117507] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Madlmeir S, Forgber T, Trogrlic M, Jajcevic D, Kape A, Contreras L, Carmody A, Liu P, Davies C, Sarkar A, Khinast J. Quantifying the Coating Yield by Modeling Heat and Mass Transfer in a Wurster Fluidized Bed Coater. Chem Eng Sci 2022. [DOI: 10.1016/j.ces.2022.117505] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Madlmeir S, Forgber T, Trogrlic M, Jajcevic D, Kape A, Contreras L, Carmody A, Liu P, Davies C, Sarkar A, Khinast JG. Modeling the coating layer thickness in a pharmaceutical coating process. Eur J Pharm Sci 2021; 161:105770. [PMID: 33610738 DOI: 10.1016/j.ejps.2021.105770] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2020] [Revised: 01/25/2021] [Accepted: 02/15/2021] [Indexed: 11/16/2022]
Abstract
Although mechanistic numerical simulations can offer great insights into a process, they are limited with respect to resolved process time. While statistical models provide long-term predictability, determining the underlying probability distributions is often challenging. In this work, detailed CFD-DEM simulations of a pharmaceutical Wurster coating process for microspheres are used to evaluate the input parameters for a novel Monte-Carlo simulation approach. The combined strengths of both modeling approaches make it possible to predict the coating mass and thickness distributions over the entire process time. It was observed that smaller beads receive a thicker coating layer since they pass the spray zone closer to the nozzle. Moreover, it was established that, in contrast to the airflow rate, the spray rate has a great impact on the inter-particle coating variability. A stochastic model was developed to investigate the relative contribution of coating layer variability and fill weight variability to the product non-uniformity in a capsule filling process of Multiple Unit Pellet Systems (MUPS).
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Affiliation(s)
- S Madlmeir
- Research Center Pharmaceutical Engineering, Graz, Austria
| | - T Forgber
- Research Center Pharmaceutical Engineering, Graz, Austria
| | - M Trogrlic
- Research Center Pharmaceutical Engineering, Graz, Austria
| | - D Jajcevic
- Research Center Pharmaceutical Engineering, Graz, Austria
| | - A Kape
- Glatt, Integrated Process Solution, Binzen, Germany
| | - L Contreras
- Worldwide Research, Development and Medical, Pfizer Inc., Sandwich, UK
| | - A Carmody
- Worldwide Research, Development and Medical, Pfizer Inc., Sandwich, UK
| | - P Liu
- Worldwide Research, Development and Medical, Pfizer Inc., Groton CT, USA
| | - C Davies
- Worldwide Research, Development and Medical, Pfizer Inc., Groton CT, USA
| | - A Sarkar
- Worldwide Research, Development and Medical, Pfizer Inc., Groton CT, USA
| | - J G Khinast
- Research Center Pharmaceutical Engineering, Graz, Austria; Institute of Process and Particle Engineering, Technical University of Graz, Austria.
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Forgber T, Toson P, Madlmeir S, Kureck H, Khinast JG, Jajcevic D. Extended validation and verification of XPS/AVL-Fire™, a computational CFD-DEM software platform. POWDER TECHNOL 2020. [DOI: 10.1016/j.powtec.2019.11.008] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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