2023 Fiscal Year Final Research Report

Development of evaluation method for the sulfur tolerance of new desulfurization catalysts and its mechanism for the origin of sulfur tolerance properites

Research Project

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Project/Area Number	20K05577
Research Category	Grant-in-Aid for Scientific Research (C)
Allocation Type	Multi-year Fund
Section	一般
Review Section	Basic Section 34030:Green sustainable chemistry and environmental chemistry-related
Research Institution	Muroran Institute of Technology
Principal Investigator	Kanda Yasuharu 室蘭工業大学, 大学院工学研究科, 准教授 (70447085)
Project Period (FY)	2020-04-01 – 2024-03-31
Keywords	耐硫黄性評価 / 昇温硫化法 / 貴金属リン化物触媒 / 硫化水素
Outline of Final Research Achievements	In this study, the sulfur tolerance of noble metal phosphide catalysts was evaluated by the temperature-programmed sulfurization (TPS) method using hydrogen sulfide. In the TPS profiles of the catalyst pretreated under conditions that favor the formation of phosphides, the consumption of hydrogen sulfide amount decreased and the peak for hydrogen sulfide consumption shifted to the higher temperature, indicating that phosphide possess a high sulfur tolerance properties. The quantitative value was close to those reported by other research groups, demonstrating that the TPS method is a superior method to evaluate sulfur tolerance of catalyst. Furthermore, TPS profile using sulfur dioxide showed a significantly lower consumption than that of hydrogen sulfide. These results revealed tha the phosphide catalyst showed high sulfur tolerance because S formed form dissociatevely adrosbed hydrogen sulfide does not easily diffuse into the noble metal phosphide particles of the catalyst.
Free Research Field	触媒化学
Academic Significance and Societal Importance of the Research Achievements	本研究では、定性的かつ定量的な両面で触媒の耐硫黄性を評価することが可能な昇温硫化(TPS)法を開発した。この方法では、定量と定性の一方のデータにとらわれることなく、触媒の真の耐硫黄性を評価できる優れた方法である。この方法の開発が学術的に最も大きな成果である。また、触媒は非常に広く工業的に使用されており、とくに石油精製における水素化脱硫プロセスでは、硫化水素が生成物として発生している。したがって、触媒の耐硫黄性を詳細に評価できる本法を工業的な触媒へ展開することで、研究成果を社会に還元できると考えられる。