Moisture sorption,thermal,and caking characteristics of L-lysine-carbonate granules  

作　　者：Suyeon An Sungahm Ahn Andres Letona Ji Hyun Shin Seung Hoon Kang Jae Yun Jeong Sang Min Park Jun Woo Kim Daeung Yu Hee Chung Donghwa Chung 

机构地区：[1]Food Technology Major,Graduate School of International Agricultural Technology,Seoul National University,Pyeongchang,25354,Republic of Korea [2]CJ BIO Research Institute,CJ CheilJedang,Suwon,16495,Republic of Korea [3]Institute of Food Industrialization,Institutes of Green Bio Science and Technology,Seoul National University,Pyeongchang,25354,Republic of Korea [4]Department of Food and Nutrition,Changwon National University,Changwon,51140,Republic of Korea [5]Center for Food and Bioconvergence,Seoul National University,Seoul,08826,Republic of Korea

出　　处：《Food Bioscience》2023年第3期2983-2990,共8页食品生物科学（英文）

基　　金：supported by the CJ BIO Research Institute,CJ Cheil-Jedang,Republic of Korea.

摘　　要：L-Lysine,an essential amino acid,is often produced in the granular form of L-lysine-monohydrochloride(L-lysine-HCl).To address chemical waste and processing cost concerns associated with the production of L-lysine-HCl granules,an alternative process has been recently developed for the production of L-lysine as granules of L-lysine-carbonate(L-lysine-CO_(3)).In the present study,the moisture sorption,thermal,and caking properties of L-lysine-CO_(3) granules were investigated in comparison with commercial L-lysine-HCl granules.L-Lysine-CO_(3) granules showed a popcorn-like surface structure(59.0%crystallinity),while L-lysine-HCl granules exhibited an angular crystalline structure(72.9%crystallinity).L-Lysine-CO_(3) granules had a less compact structure than L-lysine-HCl granules and showed excellent initial flowability comparable to L-lysine-HCl granules.L-Lysine-CO_(3) granules were more hygroscopic than L-lysine-HCl granules,probably due to their lower crystallinity and less compact structure.L-Lysine-CO_(3) granules began to undergo thermal decomposition at 192℃,probably due to CO_(2) release,followed by melting at 234℃ and further decomposition,while L-lysine-HCl granules underwent melting at 251℃,and then began to undergo thermal decomposition at 260℃.No glass transition was observed for either lysine-CO_(3) or L-lysine-HCl granules.Storage test under pressurized and accelerated conditions showed that L-lysine-CO_(3) granules were more prone to caking and formed harder agglomerates than L-lysine-HCl granules.The results showed that L-lysine-CO_(3) granules were more hygroscopic,less thermally stable,and more prone to caking,compared to commercial L-lysine-HCl granules.However,these properties of L-lysine-CO_(3) granules were at acceptable levels for commercial use,thus L-lysine-CO_(3) granules have high potential for commercial development.

关 键 词：L-Lysine-carbonate granules Moisture sorption Thermal transition Thermal stability CAKING 

分 类 号：TS201.2[轻工技术与工程—食品科学]