Heat Transfer Characteristics of Various Bulk Lyophilization Containers: Poster Presented at PDA Week 2026.

Abstract

Bulk lyophilization requires large amounts of material being filled into a bulk tray. Lyophilization cycle development for a bulk configuration normally requires a large amount of solution, typically several hundred milliliters to several liters, to obtain reproducible, representative freeze-drying results. During early development activities, this volume may not be readily available. To avoid devoting large volumes of material to developing a lyophilization cycle, alternative containers may be used, but these containers should be characterized to understand the different heat transfer characteristics and their effect on the final lyophilization cycle. The purpose of this poster is to develop a method to correlate lyophilization cycle development results between bulk trays and alternative containers and demonstrate the ability to complete bulk lyophilization cycle development on a smaller sample size. The vessels were filled with Purified Water, USP and the cycles were interrupted in primary drying and the vessels removed and weighed. Sublimation rate studies were completed in different containers to determine a correlation between Lyoguard trays and different containers to determine the optimal vessel to do small scale studies and develop lyophilization cycles for bulk products with minimal use of product.