A　two-dimensional　lattice　Boltzmann　(LB)　approach　was　established　to　implement　kinetic　concentration　boundary　conditions　in　interfacial　mass-transfer　processes　and　to　simulate　the　adsorption　process　in　porous　media　at　pore　scale　and　mesoscopic　levels.　A　general　treatment　was　applied　to　conduct　three　types　of　concentration　boundary　conditions　effectively　and　accurately.　Applicability　for　adsorption　was　verified　by　two　benchmark　examples,　which　were　representative　of　the　interparticle　mass　transport　and　intraparticle　mass　transport　in　the　adsorption　system,　respectively.　The　gas-solid　adsorption　process　in　reconstructed　porous　media　at　the　pore　scale　level　was　numerically　investigated.　Mass-transfer　processes　of　the　adsorption　reaction　were　simulated　by　executing　Langmuir　adsorption　kinetics　on　surfaces　of　adsorbent　particles.　Meanwhile,　the　homogeneous　solid　diffusion　model　(HSDM)　was　used　for　mass　transport　in　interior　particles.　The　transient　adsorbed　amount　was　obtained　in　detail,　and　the　impact　of　flow　condition,　porosity,　and　adsorbent　particle　size　on　the　entire　dynamic　adsorption　performance　was　investigated.　The　time　needed　to　approach　steady　state　decreased　with　increased　fluid　velocity.　Transient　adsorption　capability　and　time　consumption　to　equilibrium　were　nearly　independent　of　porosity,　whereas　increasing　pore　size　led　to　a　moderating　adsorption　rate　and　more　time　was　consumed　to　approach　the　saturation　adsorption.　Benefiting　from　the　advantages　of　the　LB　method,　both　bulk　and　intraparticle　mass　transfer　performances　during　adsorption　can　be　obtained　using　the　present　pore　scale　approach.　Thus,　interparticle　mass　transfer　and　intraparticle　mass　transfer　are　the　two　primary　segments,　and　intraparticle　diffusion　has　the　dominant　role.　(C)　2015　Elsevier　Inc.　All　rights　reserved.