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  • Introduction to Chemical Adsorption Analytical Techniques and Their Applications to Catalysis (.pdf)
    and refining operations. Their ac-. in the study of catalysts, particularly in evaluating the. tivity is influenced by the silica to alumina ratio. support structure. Amorphous silica-alumina catalysts have a lower. activity than zeolitic catalysts and are applied in mild. The chemical adsorption
  • Ceramics and Catalysis (.pdf)
    on the surface can affect the catalyst. -- the material employed may be amphoteric, such as. alumina, or may involve other oxides such as silica. or zirconia. Silicon carbide may also be used where. thermal stability or conductivity is a priority. The crystalline phase of the material often has
  • The Sorbead Quick Cycle Process for Simultaneous Removal of Water, Heavy Hydrocarbons and Mercaptans from Natural Gas
    silica gels, granular gels, aluminas and molecular sieves. While many configurations and adsorbents are used, they mostly share the trait of long adsorption and regeneration times, often in excess of 8 hours each. Long regeneration times allow the vessels to use external insulation. Given
  • Dual SCR Aftertreatment for Lean NOx Reduction (.pdf)
    . of hydrogen in the feedstream improve the low. 3-SCR. catalyst. In bench reactor studies from 150 oC to 500 oC,. temperature performance of silver-based HC-SCR. we have found, for modest C/N ratios, that NOx reacts. catalysts (7,8). Since that time a great amount of the. over the first catalyst
  • Chemical Sensor Could Enable New Ways To Monitor Pollutants
    other chemicals or be the site for chemical reactions. "The chemistry happens inside those cages, " he said. Though these compounds of silica and alumina can be found in nature, scientists create zeolites in the lab that are tailored for specific tasks. Dutta and former graduate student Nicholas