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Số người truy cập: 107,020,202

 Self-supported carbon nanotube (CNT) and few-layer graphene (FLG) beads with high external surface
Tác giả hoặc Nhóm tác giả: Yuefeng Liu, Tri Truong Huu, Lam D. Nguyen, Izabella Janowska,Cuong Pham-huu
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Nơi đăng: ISHHC XV-Berlin 2011, September 2011 Berlin-Germany (Poster); Số: xxx;Từ->đến trang: xxx;Năm: 2011
Lĩnh vực: Khoa học công nghệ; Loại: Báo cáo; Thể loại: Quốc tế
TÓM TẮT
Carbon nanotubes (CNTs) have received an over increasing scientific interest in several field of applications and especially in the field of catalysis. Recently, a 2D form of carbon, namelly graphene and few-layer graphene (FLG), with an extremely high mechanical strength and stiffness has been reported. However, the direct use of these materials in the catalysis field is hampered by their nanoscopic shapes which induce a high pressure drop across the catalyst bed. In order to solve this problem new methods to make CNTs and FLG with controlled macroscopic shape, high specific surface area and fully accessibility need to be developed. The aim of the present article is to report a new method to make self-supported carbon nanotubes composite with controlled macroscopic shaping, high external surface area and high mechanical attrition resistance for subsequence use as catalyst support. The synthesis method is based on the coagulation process followed by a thermal step to make entangled self-supported composite. The macroscopic shape of the composite can be finely tuned, i.e. beads, extrudates or plate, depending to the downstream application.
ABSTRACT
Carbon nanotubes (CNTs) have received an over increasing scientific interest in several field of applications and especially in the field of catalysis. Recently, a 2D form of carbon, namelly graphene and few-layer graphene (FLG), with an extremely high mechanical strength and stiffness has been reported. However, the direct use of these materials in the catalysis field is hampered by their nanoscopic shapes which induce a high pressure drop across the catalyst bed. In order to solve this problem new methods to make CNTs and FLG with controlled macroscopic shape, high specific surface area and fully accessibility need to be developed. The aim of the present article is to report a new method to make self-supported carbon nanotubes composite with controlled macroscopic shaping, high external surface area and high mechanical attrition resistance for subsequence use as catalyst support. The synthesis method is based on the coagulation process followed by a thermal step to make entangled self-supported composite. The macroscopic shape of the composite can be finely tuned, i.e. beads, extrudates or plate, depending to the downstream application.
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