Construction of carbon dioxide / hydrocarbon separation and recovery process using protic ionic liquids

2021 Fiscal Year Final Research Report

• Project/Area Number: 19K05130
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 27010:Transport phenomena and unit operations-related
• Research Institution: Nihon University
• Principal Investigator: KODAMA Daisuke 日本大学, 工学部, 准教授 (50307807)
• Project Period (FY): 2019-04-01 – 2022-03-31
• Keywords: イオン液体 / 二酸化炭素 / 炭化水素 / 選択性 / 溶解度

Outline of Final Research Achievements

A new protic ionic liquids were synthesized and investigated for selectivity between carbon dioxide and hydrocarbons. The protic ionic liquids showed higher selectivity for methane than physical absorbents in commercial operation, but there remained some improvement on selectivity between carbon dioxide and ethane or ethylene. Based on a series of precise measurement data obtained, the economics of the carbon dioxide separation and capture process were evaluated, and the results showed that the heat load could be reduced by about 10% compared to the conventional process using a common amine aqueous solution.

Free Research Field

化工物性

Academic Significance and Societal Importance of the Research Achievements

2050年までのカーボンニュートラル実現には新たな技術の開発が必要であり、国内外で精力的に研究が進められている。現在、イオン液体を利用した二酸化炭素の分離回収プロセスは稼働していないが、本研究で開発されたプロトン性イオン液体は、高い二酸化炭素とメタンとの選択性を示す一方で、従来プロセスよりも低い運転コストになる可能性があり、有望なガス吸収溶媒であることが示唆された。