Contact Us: 01763 262333
MCA Services
Physical Characterisation of Catalysts
Mesopore distribution from gas adsorption isotherm
Key Techniques Micropore Analysis: pore size, area and volume in the micropore range Micropore Analysis: choice of adsorbate for ultra-micropore characterisation Gas Adsorption: pore size, area and volume in the mesopore range Gas Adsorption: BET Surface Area Mercury Porosimetry: pore size, area and volume in meso & macropore ranges Mercury Intrusion / Extrusion Porosimetry: cavity to throat size Chemisorption: active metal surface area and dispersion measurement Permeability and Tortuosity: measurement by mercury intrusion porosimetry Temperature Programmed Methods: reduction, oxidation & desorption Density Measurement: absolute density, bulk density and skeletal density
MCA   Services   offers   a   complete   suite   of   techniques   for   the   physical   characterisation of   catalyst   systems.   The   combination   of   mercury   porosimetry   and   gas   adsorption provides   characterisation   throughout   the   pore   size   range,   from   ultra-micropores through   to   macro-pores   with   a   maximum   size   of   ~   650   µm.   Mercury   porosimetry can   be   extended   to   consider   extrusion   analysis   for   consideration   of   pore   geometry as well as permeability and tortuosity determination. Most   gas   adsorption   options   also   include   the   calculation   of   BET   surface   area   as standard.   Whilst   nitrogen   adsorption   is   the   most   commonly   applied   technique, alternatives    are    available    for    more    specialised    analyses.    For    example    carbon dioxide    for    ultra-micropores    with    the    capability    of    combination    with    nitrogen adsorption    to    complete    a    single,    harmonious,    pore    size    distribution.    Argon adsorption   is   available   for   micro-porous   materials   proving   problematic   for   nitrogen adsorption,   for   example   those   with   charged   surface   species   such   as   zeolites   and organic frameworks.
Pore size distribution from mercury porosimetry TPR proflie of manganese dioxide MnO2
Chemisorption   (chemical   adsorption)   is   routinely   applied   to   the   analysis   of   active metal   constituents   to   determine   their   availability   for   a   desired   catalytic   reaction. Active   metal   dispersion,   surface   area   and   crystallite   size   are   commonly   applied and    at    MCA    Services    we    offer    measurements    using    both    static    and    dynamic methods.   Hydrogen   and   carbon   monoxide   sorption   represent   the   most   common approach   but   we   also   offer   more   specialised   options,   for   example   nitrous   oxide   and ammonia    to    ensure    that    the    majority    of    active    metals    and    loadings    can    be analysed   with   confidence.   Alongside   chemisorption,   our   Temperature   Programmed options   provide   analyses   for   reduction,   oxidation   and   desorption,   completing   the characterisation   and   understanding   of   active   constituents.   All   are   applicable   to   new and   spent   catalyst   materials   and   are   particularly   useful   when   considering   the development or assessment of a system, its performance and its regeneration. MCA   Services   offers   a   complete   suite   of   techniques   for   the   characterisation   of material   porosity   throughout   the   range   of   micropores,   through   mesopores   and macropores.   We   also   have   extensive   experience   and   expertise   to   actively   assist with   the   interpretation   of   results,   relating   porous   characteristics   to   the   sample material   and   its   ultimate   application   in   a   battery   system.   Combined   with   state-of- the-art   instrumentation   and   software,   offering   flexible   and   extensive   reporting options,   we   help   to   maximise   the   amount   of   high   quality   data   describing   sample materials.
The significance and influence of the porous nature of catalyst systems with respect to their functionality, performance and efficiency is well known, as is the understanding of the physico-chemical properties of the active constituents. Characterisation of the porous nature of catalysts can be applied to the active constituents, support materials or the finished system. Understanding the porous and active nature of catalysts is vital to both un-used and spent materials and also to considering degradation and the regeneration process.
Tel: 01763 262333
Key Techniques. Micropore Analysis: pore size, area and volume determination in the micropore range. Micropore Analysis: wide choice of adsorbate gases for ultra- micropore characterisation. Gas Adsorption: pore size, area and volume determination in the mesopore range. Gas Adsorption: BET Surface Area. Mercury Porosimetry: pore size, area and volume determination in meso & macropore ranges. Mercury Intrusion / Extrusion Porosimetry: cavity to throat size determination. Chemisorption: active metal surface area and dispersion measurement – static and dynamic methods. Permeability and Tortuosity: measurement by mercury intrusion porosimetry. Temperature Programmed Methods: reduction, oxidation, adsorption & desorption. Density Measurement: absolute density, bulk (envelope) density and skeletal density
MCA Services
01763 262333
Mesopore distribution from gas adsorption isotherm
MCA    Services    offers    a    complete    suite    of    techniques    for    the physical   characterisation   of   catalyst   systems.   The   combination   of mercury       porosimetry       and       gas       adsorption       provides characterisation    throughout    the    pore    size    range,    from    ultra- micropores   through   to   macro-pores   with   a   maximum   size   of   ~ 650    µm.    Mercury    porosimetry    can    be    extended    to    consider extrusion   analysis   for   consideration   of   pore   geometry   as   well   as permeability and tortuosity determination. Most   gas   adsorption   options   also   include   the   calculation   of   BET surface   area   as   standard.   Whilst   nitrogen   adsorption   is   the   most commonly   applied   technique,   alternatives   are   available   for   more specialised    analyses.    For    example    carbon    dioxide    for    ultra- micropores    with    the    capability    of    combination    with    nitrogen adsorption     to     complete     a     single,     harmonious,     pore     size distribution.    Argon    adsorption    is    available    for    micro-porous materials    proving    problematic    for    nitrogen    adsorption,    for example   those   with   charged   surface   species   such   as   zeolites   and organic frameworks.
Pore size distribution by mercury porosimetry
Chemisorption   (chemical   adsorption)   is   routinely   applied   to   the analysis    of    active    metal    constituents    to    determine    their availability    for    a    desired    catalytic    reaction.    Active    metal dispersion,    surface    area    and    crystallite    size    are    commonly applied   and   at   MCA   Services   we   offer   measurements   using   both static   and   dynamic   methods.   Hydrogen   and   carbon   monoxide sorption   represent   the   most   common   approach   but   we   also   offer more    specialised    options,    for    example    nitrous    oxide    and ammonia    to    ensure    that    the    majority    of    active    metals    and loadings     can     be     analysed     with     confidence.     Alongside chemisorption,   our   Temperature   Programmed   options   provide analyses   for   reduction,   oxidation   and   desorption,   completing   the characterisation   and   understanding   of   active   constituents.   All are   applicable   to   new   and   spent   catalyst   materials   and   are particularly     useful     when     considering     the     development     or assessment of a system, its performance and its regeneration. MCA   Services   offers   a   complete   suite   of   techniques   for   the characterisation   of   material   porosity   throughout   the   range   of micropores,   through   mesopores   and   macropores.   We   also   have extensive   experience   and   expertise   to   actively   assist   with   the interpretation   of   results,   relating   porous   characteristics   to   the sample    material    and    its    ultimate    application    in    a    battery system.    Combined    with    state-of-the-art    instrumentation    and software,   offering   flexible   and   extensive   reporting   options,   we help   to   maximise   the   amount   of   high   quality   data   describing sample materials.
TPR profile of MnO2
Physical Characterisation of Catalysts
The significance and influence of the porous nature of catalyst systems with respect to their functionality, performance and efficiency is well known, as is the understanding of the physico- chemical properties of the active constituents. Characterisation of the porous nature of catalysts can be applied to the active constituents, support materials or the finished system. Understanding the porous and active nature of catalysts is vital to both un-used and spent materials and also to considering degradation and the regeneration process.