Development of dealkylation process for smart conversion of heavy oils

2020 Fiscal Year Final Research Report

• Project/Area Number: 16H04568
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Catalyst/Resource chemical process
• Research Institution: Tottori University
• Principal Investigator: KATADA Naonobu 鳥取大学, 工学研究科, 教授 (00243379)
• Co-Investigator(Kenkyū-buntansha): 辻 悦司 鳥取大学, 工学研究科, 准教授 (80610443) ; 菅沼 学史 鳥取大学, 工学研究科, 准教授 (90731753)
• Project Period (FY): 2016-04-01 – 2021-03-31
• Keywords: 重質油 / 固体触媒 / シリカモノレイヤー / ゼオライト / 芳香族

Outline of Final Research Achievements

Alumina-supported silica monolayer catalyst with pore diameter > 6 nm (Si surface density of 8 nm-2) dealkylated to remove all the alkyl chains with >C3 length from approximately 100% of alkyl aromatics with two or more rings in practical vacuum gas oil under the optimized conditions. Liquid phase separation of aromatics and aliphatics was enabled, and parameters in the kinetics of separation, which controlled the performance, were clarified. For partial hydrogenation of naphthalene into tetralin, 100% of naphthalene was converted into tetralin with a 99% selectivity on a dispersed molybdenum oxide monolayer catalyst, derived from phosphomolybdic acid). For the decomposition of tetralin, molybdenum-added * BEA zeolite showed a tetralin conversion of 95% and selectivity into LPG / alkylbenzene of 85%.

Free Research Field

固体触媒化学

Academic Significance and Societal Importance of the Research Achievements

[1]重質油中のアルキル多環芳香族を脱アルキル化し，[2]脂肪族と芳香族を分離し，[3]ナフタレンをテトラリンに転換し，[4]有用なベンゼン誘導体に転換することを試みた．[1]では有用成分を損なわないこと，分離の障害となる成分を残さないことが必要で，新規なシリカモノレイヤー触媒によって実現した．[2]では課題が速度にあることと対策を示した．[3]，[4]にも新規触媒を見出し，高い効率を実証した．