Development of Highly Active Catalysts for Chemical Recycling of Waste Plastics

废塑料化学回收高活性催化剂的研制

• 批准号: 15550136
• 负责人: UEMICHI Yoshio
• 金额: $ 2.43万
• 依托单位: Muroran Institute of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2003
• 资助国家: 日本
• 起止时间: 2003 至 2004
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-15550136/
• 关键词: Waste Plastics; polypropylene; Recycling; Catalyst; Composite Catalysts; Borosilicate; MCM-41; ポリオレフィン; 低級オレフィン; ホウ素触媒

The catalytic activities of H-borosilicate, mesoporous silica MCM-41, and their mixtures for the degradation of polyolefins have been investigated in order to develop a technology for chemical recycling of waste plastics. The borosilicate characterized by an MFI microporous structure and a low acidity was effective as a catalyst for the conversion of polypropylene to lower olefins with carbon numbers of 2-5, while ordered mesoporous MCM-41 with an average pore diameter of 3.8 nm and a very low acidity was less effective for the reaction. However, highly efficient catalysts were prepared when the borosilicate and MCM-41 were physically mixed. The composite catalysts showed higher selectivities to the lower olefins than those of the pure catalysts. The highest selectivity was observed at 1:1 mixture. Acidity measurements using NH_3-TPD revealed no formation of newly acidic sites on the composite. It is therefore suggested the excellent performance of the composite catalyst is attributed to the mesopores of MCM-41 that are appropriate to convert large decomposed fragments to small molecules.

已经研究了H-纤维硅酸盐，介孔二氧化硅MCM-41的催化活性及其用于降解聚芬蛋白的混合物，以开发一种用于化学回收废物塑料的技术。以MFI微孔结构和低酸度为特征的硼硅酸盐是有效的，可作为催化剂，可将聚丙烯转化为碳数为2-5的降低烯烃，而有序的中孔MCM-41的平均孔直径为3.8 nm，而酸度为3.8 nm，并且酸度非常低，对反应的有效性较低。但是，当硼硅酸盐和MCM-41物理混合时，制备了高效的催化剂。复合催化剂比纯催化剂显示出更高的烯烃选择性。在1：1混合物时观察到最高的选择性。使用NH_3-TPD进行的酸度测量表明，没有在复合材料上形成新的酸性位点。因此，建议复合催化剂的出色性能归因于MCM-41的中孔，这些中孔适合将大型分解片段转换为小分子。

项目成果

上道 芳夫: "ポリエチレンの接触分解による石油化学原料化ケミカルリサイクル"室蘭工業大学紀要. 53. 29-34 (2004)

Yoshio Kamimichi：“通过催化裂化将聚乙烯化学回收为石化原料”室兰工业大学通报，53. 29-34 (2004)。

Chemical Recycling of Polyethylene by Catalytic Degradation into Chemical Feedstocks

通过催化降解化学回收聚乙烯为化学原料

• 发表时间: 2003
• 期刊: Memoirs of the Muroran Institute of Technology 53
• 作者: M.Inokuchi;A.Nagaoka;M.Yamamoto;I.Shirotani;J.Hayashi;K.Yakushi;H.Kawamura;H.Inokuchi;Y.Uemichi
• 通讯作者: Y.Uemichi

ポリエチレンの接触分解による石油化学原料化ケミカルリサイクル

通过催化裂解将聚乙烯化学回收为石化原料

• 发表时间: 2003
• 期刊: 室蘭工業大学紀要 53
• 作者: M.Inokuchi et al.;上道芳夫
• 通讯作者: 上道芳夫

プラスチック化学再資源化技術

塑料化学回收技术

• 发表时间: 2005
• 作者: I.Shirotani;H.Hayashi;K.Hirano;H.Kawamura;M.Inokuchi;K.Yakushi;H.Inokuchi;Y.Uemichi;M.Inokuchi et al.;上道芳夫
• 通讯作者: 上道芳夫

Chemical Recycling of Polyolefins Using Metallosilicate Catalysts

使用金属硅酸盐催化剂化学回收聚烯烃

• 期刊: Technologies for Chemical Recycling of Waste Plastics (CMC) (in press)
• 作者: I.Shirotani;H.Hayashi;K.Hirano;H.Kawamura;M.Inokuchi;K.Yakushi;H.Inokuchi;Y.Uemichi
• 通讯作者: Y.Uemichi