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The effect of boron addition on texture and structure of NiMo/Al 2 O 3 catalysts
Author(s) -
Lewandowski Marek,
Sarbak Ze
Publication year - 1997
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.2170320403
Subject(s) - boron , catalysis , porosimetry , bet theory , thermal stability , ion , specific surface area , monolayer , texture (cosmology) , materials science , nickel , inorganic chemistry , porosity , chemical engineering , chemistry , nanotechnology , metallurgy , organic chemistry , composite material , porous medium , engineering , image (mathematics) , artificial intelligence , computer science
The effect of support (Al 2 O 3 ) modification with borate ions and the effect of their concentration on the texture and structure of nickel‐molybdena catalysts were studied. The surface area and pore volume of the samples were determined using the BET method, whereas pores distribution – besides the BET method also by mercury porosimetry. FT‐IR, derivatographic, and diffractometric studies were also performed. Modification with borate ions does not bring about any change in the type of the support pores, nor does it change its crystallic structure. However, a considerable decrease in the surface area of the support was observed. It was shown that modification with borate ions leads to a decrease in thermal stability of catalysts, yet increase in concentration of borate ions raises the thermal stability of the samples. It was found that on the catalyst surface borate ions form a well‐dispersed monolayer structure.