tailieunhanh - Study on characterization of ni biochar catalyst derived from microalgal biomass

Biochar supported nickel (Ni/biochar) catalyst was prepared by incipient wetness method and characterized by using a series of techniques such as XRD, SEM, TEM, FT-IR, H2-TPR and BET. These charaterizations indicated the catalyst structure and demonstrated its potential for applications in reduction – oxidation reactions in particular the HDO process. | Journal of Science and Technology 54 (5) (2016) 664-671 DOI: STUDY ON CHARACTERIZATION OF Ni/BIOCHAR CATALYST DERIVED FROM MICROALGAL BIOMASS Vuong Van Pham1, Hong Khanh Dieu Nguyen2,* 1 2 Vietnam Oil and Gas Group, No. 18 Lang Ha street, Hanoi city Hanoi University of Science and Technology, No. 1 Dai Co Viet street, Hanoi city * Email: dieuhong_bk@ Received: 16 January 2016; Accepted for publication: 2 August 2016 ABSTRACT Biochar supported nickel (Ni/biochar) catalyst was prepared by incipient wetness method and characterized by using a series of techniques such as XRD, SEM, TEM, FT-IR, H2-TPR and BET. These charaterizations indicated the catalyst structure and demonstrated its potential for applications in reduction – oxidation reactions in particular the HDO process. Keywords: carbon supported nickel, HDO, microalgal biomass, biochar. 1. INTRODUCTION Nowaday most of catalysts applied for hydrodeoxygenation (HDO) process belonged to those used for the hydrodesufurization (HDS) process because of their correspondences in the reaction mechanisms. These catalysts contained various reduction metals such as Co, Mo or Ni supported on aluminium oxides, and the metals could be partially sulfurized for stabiliazing their activity and avoiding the catalysts poisons [1]. The generation of catalysts still showed good activity for the HDO processes, but the expenses for preparations, stabilizations and activations considerably restricted their applications. On the other hand a series of different catalysts were also invented such as NiW, noble metal based catalysts and FeS, but the major disadvantages still be concerned to their complicate preparation processes and high cost [2 - 4]. Pyrolyzing of biomass could produce two kinds of main products including biochar and bio-oil; in which, the bio-oil as feedstock played an important role in the HDO processes, but the biochar has not been used effectively yet. In fact the biochar .