吸附動(dòng)力學(xué)及動(dòng)態(tài)學(xué)

1、2022-6-1吸附過程及應(yīng)用吸附過程及應(yīng)用12022-6-1吸附過程及應(yīng)用吸附過程及應(yīng)用22022-6-1吸附過程及應(yīng)用吸附過程及應(yīng)用3吸附速率曲線吸附速率曲線0102030405060700.000.020.040.060.080.100.120.140.16 吸附量,kg/kg吸附時(shí) 間 ,min 無(wú)機(jī) ; 南工 3#正己烷在不同生產(chǎn)廠的正己烷在不同生產(chǎn)廠的5A分子篩上的吸附速率曲線（分子篩上的吸附速率曲線（30）右圖為正己烷在右圖為正己烷在5A分子篩上分子篩上的吸附速率曲線的吸附速率曲線在單位時(shí)間內(nèi)被單位體積在單位時(shí)間內(nèi)被單位體積(或質(zhì)量或質(zhì)量)吸附劑所吸附的物質(zhì)吸附劑所吸附的物質(zhì)量稱

2、為量稱為吸附速度吸附速度。2022-6-1吸附過程及應(yīng)用吸附過程及應(yīng)用42022-6-1吸附過程及應(yīng)用吸附過程及應(yīng)用5內(nèi)表面吸附內(nèi)表面外表面吸附主體吸附內(nèi)擴(kuò)散外擴(kuò)散 2022-6-1吸附過程及應(yīng)用吸附過程及應(yīng)用6 2022-6-1吸附過程及應(yīng)用吸附過程及應(yīng)用7dcGD F tdn 2022-6-1吸附過程及應(yīng)用吸附過程及應(yīng)用8()dqk cydt2022-6-1吸附過程及應(yīng)用吸附過程及應(yīng)用9()dck cyD Fdn 12111kkk2022-6-1吸附過程及應(yīng)用吸附過程及應(yīng)用102022-6-1吸附過程及應(yīng)用吸附過程及應(yīng)用112022-6-1吸附過程及應(yīng)用吸附過程及應(yīng)用122022-6-1吸

3、附過程及應(yīng)用吸附過程及應(yīng)用132022-6-1吸附過程及應(yīng)用吸附過程及應(yīng)用14進(jìn)進(jìn)料料CFCout床層內(nèi)吸床層內(nèi)吸附質(zhì)濃度附質(zhì)濃度Cout/CF=0Cout/CF=10Cout/CF1t=00ttbC-床床層層內(nèi)吸內(nèi)吸附附質(zhì)濃質(zhì)濃度度透過曲線透過曲線MTZ-傳質(zhì)傳質(zhì)區(qū)區(qū)Cout/CF=0.05Cout/CF=0.95LUB2022-6-1吸附過程及應(yīng)用吸附過程及應(yīng)用15吸附前沿吸附前沿(或或傳質(zhì)前沿）傳質(zhì)前沿）2022-6-1吸附過程及應(yīng)用吸附過程及應(yīng)用16 以吸附床長(zhǎng)度（以吸附床長(zhǎng)度（z)為橫坐標(biāo)，吸附量為橫坐標(biāo)，吸附量(q)為縱坐標(biāo)，作圖即為縱坐標(biāo)，作圖即為為吸附負(fù)荷曲線吸附負(fù)荷曲線。20

4、22-6-1吸附過程及應(yīng)用吸附過程及應(yīng)用172022-6-1吸附過程及應(yīng)用吸附過程及應(yīng)用182022-6-1吸附過程及應(yīng)用吸附過程及應(yīng)用192022-6-1吸附過程及應(yīng)用吸附過程及應(yīng)用202022-6-1吸附過程及應(yīng)用吸附過程及應(yīng)用21Z)/)(1(b0bbCquddzm2022-6-1吸附過程及應(yīng)用吸附過程及應(yīng)用22)/)(1(b0bbCquddzm2022-6-1吸附過程及應(yīng)用吸附過程及應(yīng)用232022-6-1吸附過程及應(yīng)用吸附過程及應(yīng)用242022-6-1吸附過程及應(yīng)用吸附過程及應(yīng)用252022-6-1吸附過程及應(yīng)用吸附過程及應(yīng)用262022-6-1吸附過程及應(yīng)用吸附過程及應(yīng)用27Z20

5、22-6-1吸附過程及應(yīng)用吸附過程及應(yīng)用28)1 (0eaZZ5 . 0),/(A一般BA式中，式中， = 2022-6-1吸附過程及應(yīng)用吸附過程及應(yīng)用29n 影響傳質(zhì)區(qū)的因素影響傳質(zhì)區(qū)的因素吸附劑顆粒尺寸吸附劑顆粒尺寸吸附劑床層深度吸附劑床層深度氣體流速的影響氣體流速的影響溫度的影響溫度的影響吸附質(zhì)濃度的影響吸附質(zhì)濃度的影響壓力的影響壓力的影響 2022-6-1吸附過程及應(yīng)用吸附過程及應(yīng)用302022-6-1吸附過程及應(yīng)用吸附過程及應(yīng)用31LUB未用床層的等價(jià)長(zhǎng)度未用床層的等價(jià)長(zhǎng)度n 由透過曲線確定吸附劑床層長(zhǎng)度由透過曲線確定吸附劑床層長(zhǎng)度MTZ-傳質(zhì)傳質(zhì)區(qū)區(qū)未用床層未用床層2022-6-1

6、吸附過程及應(yīng)用吸附過程及應(yīng)用32n 由透過曲線確定吸附劑床層長(zhǎng)度由透過曲線確定吸附劑床層長(zhǎng)度則則Let)tt (LUBsbs式中式中Le是實(shí)驗(yàn)床層長(zhǎng)度。是實(shí)驗(yàn)床層長(zhǎng)度。2022-6-1吸附過程及應(yīng)用吸附過程及應(yīng)用33n 由透過曲線確定吸附劑床層長(zhǎng)度由透過曲線確定吸附劑床層長(zhǎng)度(7-47)dtccteFst)1(0 )LES()D(qtQCbFbFF24 (7-46)2022-6-1吸附過程及應(yīng)用吸附過程及應(yīng)用342022-6-1吸附過程及應(yīng)用吸附過程及應(yīng)用35透過曲線數(shù)據(jù)見下表：透過曲線數(shù)據(jù)見下表：c出口出口/10-6(V)時(shí)間時(shí)間/hc出口出口/10-6(V)時(shí)間時(shí)間/hc出口出口/10-6

7、(V)時(shí)間時(shí)間/h109.023810.2111511.519.036510.4123511.7549.249810.6133012.099.465010.8141012.5339.680811.0144012.8809.898011.25144013.014210.0te=12.8h， ，tb=9.4h進(jìn)料中水含量進(jìn)料中水含量出口氣中水蒸氣含量出口氣中水蒸氣含量例：例：2022-6-1吸附過程及應(yīng)用吸附過程及應(yīng)用36tb=20h , b=713kg/m3qF =0.215 kg H2O/kg分子篩， q0=1kg/100kg分子篩)()4(2LESDqtQCbbFF(7-46)床層長(zhǎng)度床層長(zhǎng)度LB=理想床層長(zhǎng)度理想床層長(zhǎng)度（LES）+附加長(zhǎng)度附加長(zhǎng)度（LUB）例例:22602592010181440kmolN/OkgH.CF)mh/(kmol/DQF221444mDqtQCLESbbFF511. 0713)01. 0215. 0(2014402592. 0)4(22022-6-1吸附過程及應(yīng)用吸附過程及應(yīng)用37例例，解解： LUB=？m.Let)tt (LUBsbs0370268093104099310用積分法求用積分法求LUB積分得：積分