PRODUCTION OF HYDROGEN AND CARBON NANOTUBES BY CATALYTIC PYROLYSIS OF WASTE POLYPROPYLENE IN A TWO-STEP PROCESS
The efficient conversion of virgin or waste polypropylene (PP) into multi-walled carbon nanotubes (MWCNTs) and hydrogen without carbon oxides has been investigated using a two-step reaction system. The proposed process consisted of two steps: pyrolysis of PP over HZSM-5 zeolite and montmorillonite in a screw kiln reactor and the following catalytic decomposition of pyrolysis gases over the nickel catalysts in a moving-bed reactor for producing MWCNTs and hydrogen simutaneously. The effects of pyrolysis temperature, pyrolysis catalysts, decomposition catalysts and polymer modifiers on the yields and morphology of MWCNTs have been determined. MWCNTs yields increased with the pyrolysis temperature increasing from 550 to 750℃. Modification of the nickel catalyst with doping of copper promoted the yield of MWCNTs and led to a production of MWCNTs with an attractive structure. These results have demonstrated that the coupled process is an efficient system for the continuous conversion of waste PP to hydrogen and nanocarbon materials.
Jie Liu Zhiwei Jiang Haiou Yu Tao Tang
State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry,Chinese Academy of Sciences, Changchun 130022,China
国际会议
成都
英文
118-122
2009-10-11（万方平台首次上网日期，不代表论文的发表时间）