Fu Jinxia, Summers Sabrina, Morgan Trevor J, Turn Scott Q, Kusch William
Hawaii Natural Energy Institute, University of Hawaii, Honolulu, Hawaii 96822, United States.
TerViva, Inc., Oakland, California 94612, United States.
ACS Omega. 2021 Mar 25;6(13):9222-9233. doi: 10.1021/acsomega.1c00635. eCollection 2021 Apr 6.
Pongamia, a leguminous, oilseed-bearing tree, is a potential resource for renewable fuels in general and sustainable aviation fuel in particular. The present work characterizes physicochemical properties of reproductive materials (seeds and pods) from pongamia trees grown in different environments at five locations on the island of Oahu, Hawaii, USA. Proximate and ultimate analyses, heating value, and elemental composition of the seeds, pods, and de-oiled seed cake were determined. The oil content of the seeds and the properties of the oil were determined using American Society for Testing and Materials and American Oil Chemist's Society methods. The seed oil content ranged from 19 to 33 wt % across the trees and locations. Oleic (C18:1) was the fatty acid present in the greatest abundance (47 to 60 wt %), and unsaturated fatty acids accounted for 77 to 83 wt % of the oil. Pongamia oil was found to have similar characteristics as other plant seed oils (canola and jatropha) and would be expected to be well suited for hydroprocessed production of sustainable aviation fuel. Nitrogen-containing species is retained in the solid phase during oil extraction, and the de-oiled seed cake exhibited enrichment in the N content, ∼5 to 6%, in comparison with the parent seed. The pods would need further treatment before being used as fuel for combustion or gasification owing to the high potassium and chlorine contents.
水黄皮是一种豆科含油籽的树木，总体而言是可再生燃料的潜在资源，特别是可持续航空燃料的潜在资源。本研究对生长在美国夏威夷瓦胡岛五个不同环境地点的水黄皮树的繁殖材料（种子和豆荚）的物理化学性质进行了表征。测定了种子、豆荚和脱油籽饼的近似和最终分析、热值及元素组成。种子的含油量和油的性质采用美国材料与试验协会和美国油脂化学家协会的方法进行测定。不同树木和地点的种子含油量在19%至33%（重量）之间。油酸（C18:1）是含量最丰富的脂肪酸（47%至60%，重量），不饱和脂肪酸占油的77%至83%（重量）。发现水黄皮油与其他植物种子油（油菜籽和麻风树）具有相似的特性，预计非常适合通过加氢处理生产可持续航空燃料。在油提取过程中，含氮物质保留在固相中，与原始种子相比，脱油籽饼的氮含量有所富集，约为5%至6%。由于钾和氯含量较高，豆荚在用作燃烧或气化燃料之前需要进一步处理。
