Tong Hop Xuc Tac Tren Chat Mang

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    04-Jun-2018

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  • 8/13/2019 Tong Hop Xuc Tac Tren Chat Mang

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    Sn xut xc tctrn cht mang

    ZeoliteSilicagelOxit

    nhm

    Bi thuyt trnh

    Sn xut xc tc trn cht mang

    Thc hin :

    Nguyn Minh Kha MSSV: 60501215Phng Quc Tm MSSV: 60502475

    Lp HC05KSTN

    Hng dn: C Trn Mai Phng

  • 8/13/2019 Tong Hop Xuc Tac Tren Chat Mang

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    Sn xut xc tctrn cht mang

    ZeoliteSilicagelOxit

    nhm

    Sn xutxc tc trncht mang

    Phngphp chung

    Mt s chtmang quan

    trng

    SilicagelOxit

    nhmZeolite

  • 8/13/2019 Tong Hop Xuc Tac Tren Chat Mang

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    Sn xut xc tctrn cht mang

    ZeoliteSilicagelOxit

    nhm

    Cho cau t hoat ong gan vao chat mang.

    Chat mang la vat lieu tr, co nhieu lo xop va t hoat ong hoa

    hoc.

    Tuy thuoc vao loai thiet b phan ng, chat xuc tac tren chat mang

    co the co nhng hnh dang nh: cau, tru, vay

    I AC TRNG CHUNG CUA PHNG PHAP

  • 8/13/2019 Tong Hop Xuc Tac Tren Chat Mang

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    Sn xut xc tctrn cht mang

    ZeoliteSilicagelOxit

    nhm

    ac trng chung cua phng phap

    Thng ngi ta tam cau t xuc tac len chat mang bang dung dch

    cha cau t o.

    Xuc tac kim loai thng thu dang hydroxyt tren chat mang, sau o

    chuyen sang dang oxyt va kh en kim loai.

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    Sn xut xc tctrn cht mang

    ZeoliteSilicagelOxit

    nhm

    CAC BC THC HIEN VIEC TAM HAT CHAT

    MANG

    Hut chan khong kh t lo xop cua chat mang.

    X ly chat mang bang dung dch.

    Tach dung dch tha.

    Say va nung.

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    Sn xut xc tctrn cht mang

    ZeoliteSilicagelOxit

    nhm

    Hut chan khong chat mang

    Tang s ong nhat cua hat trong qua trnh tam

    Tang nhanh qua trnh tam

    V:

    Thng trc khi tam trong cac mao quan b bao hoa mot lng kh de

    tan vao dung dch tam

    Km ham s tham qua cua dung dch tam

  • 8/13/2019 Tong Hop Xuc Tac Tren Chat Mang

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    Sn xut xc tctrn cht mang

    ZeoliteSilicagelOxit

    nhm

    Hut chan khong chat mang

    Ky thuat chan khong co nhieu phc tap nen thng giai oan nay

    c bo qua.

    Mat khac, ap suat mao quan khi tam co the at en hang tram

    atm, no de dang thay the khong kh trong mao quan.

    Qua trnh thay the nay cang nhanh neu co gia nhiet.

  • 8/13/2019 Tong Hop Xuc Tac Tren Chat Mang

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    Sn xut xc tctrn cht mang

    ZeoliteSilicagelOxit

    nhm

    Tam lien tuc cho san pham ong nhat hn ve thanh phan hoat tnh xuc

    tac.

    Sau moi lan tam can chuyen qua giai oan gia cong nhiet.

    So lan tam phu thuoc nhieu vao cau truc lo xop cua chat mang echuyen van en tan ben trong mao quan.

    ac biet mao quan nho, tam nhieu co the lam bt hoan toan cac mao

    quan, lam mat tac dung xuc tac.

    Theo chu k

    Lin tc

    Tm xctc

  • 8/13/2019 Tong Hop Xuc Tac Tren Chat Mang

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    Sn xut xc tctrn cht mang

    ZeoliteSilicagelOxit

    nhm

    Tam xuc tac

    a so cac trng hp, thi gian tam co the xac nh theo pt Enstein:

    r: quang ng i trung bnh cua cau t khuech tan (xem la ban ban knh

    hat).

    De: he so khuech tan.

    = r2/(2De)

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    Sn xut xc tctrn cht mang

    ZeoliteSilicagelOxit

    nhm

    II/ MOT SO CHAT MANG QUAN TRONG

    Silicagel

    Oxit nhom

    Zeolite

  • 8/13/2019 Tong Hop Xuc Tac Tren Chat Mang

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    Sn xut xc tctrn cht mang

    ZeoliteSilicagelOxit

    nhm

    La chat trong suot hay hat m, co nhieu lo xop.

    S

    i

    li

    c

    a

    g

    el

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    Sn xut xc tctrn cht mang

    ZeoliteSilicagelOxit

    nhm

    Cau truc xop phu thuoc vao loai silicagel, co the dao ong khoang

    20-60%.

    Be mat rieng 200-800 m2/g.

    ng knh lo xop khoang 3-10 nm.

    ong vai tro nh la chat mang cua chat xuc tac hoat ong.

    S

    i

    li

    c

    a

    g

    el

  • 8/13/2019 Tong Hop Xuc Tac Tren Chat Mang

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    Sn xut xc tctrn cht mang

    ZeoliteSilicagelOxit

    nhm

    Trong cong nghiep, cho hydroxit silicagel p vi H2SO4.

    Quy trnh

    Hydroxyt vo nh hnh cua silic (SiO2.n H2O)

    S bien oi cua gel theo c che a ngng tu, tao cac phan t vi

    kch thc keo dang cau.

    nSi(OH)4SinO2n-m + (2n-m)H2O

    keo gel ra sy

    San xuat

    S

    i

    li

    c

    a

    g

    el

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    Sn xut xc tctrn cht mang

    ZeoliteSilicagelOxit

    nhm

    Ngoai ra, san xuat silicagel trong cong nghiep theo p:

    Na2O.3SiO2+ H2SO43SiO2+ H2O + Na2SO4

    Keo tao ra c ong ran, ra lam kho va nung.

    Loai gel nh vay co cau truc xop ong nhat.

    San xuat

    S

    i

    li

    c

    a

    g

    el

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    Sn xut xc tctrn cht mang

    ZeoliteSilicagelOxit

    nhm

    He thong san xuat

    S

    i

    li

    c

    a

    g

    el

  • 8/13/2019 Tong Hop Xuc Tac Tren Chat Mang

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    Sn xut xc tctrn cht mang

    ZeoliteSilicagelOxit

    nhm

  • 8/13/2019 Tong Hop Xuc Tac Tren Chat Mang

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    Sn xut xc tctrn cht mang

    ZeoliteSilicagelOxit

    nhm

    O

    xi

    t

    n

    h

    m

    Ran chac

    o xop kem (5-

    25%)

    Be mat rieng

    nho (1m2/g).

    Kem ben hn

    Cau truc xop

    (50-70%)

    Be mat rieng

    ln (120-150m2/g)

    -Al2O3 - Al2O3

    - Al2O3khong nhng la chat mang ma con la chat xuc tac cuanhieu phan ng.

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    Sn xut xc tctrn cht mang

    ZeoliteSilicagelOxit

    nhm

    ac iem cua - Al2O3

    Thanh phan (% khoi lng) : Na2O t 0,1-0,6%; SiO20,1-1,0%; Fe2O3

    0,1-1,0%

    ng knh cua hat khoang 3-4 nm.

    Khoi lng rieng chat ong 0,6-0,9 g/m3.

    o xop tong 0,4-0,7 cm3/g.

    ng knh mao quan 3-4 nm.

    O

    xi

    t

    n

    h

    m

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    Sn xut xc tctrn cht mang

    ZeoliteSilicagelOxit

    nhm

    Ky thuat san xuat - Al2O3

    Hau het eu da tren c s thu Al(OH)3bang cach tai ket tua at

    set dang hydrat.

    Ban chat qua trnh the hien theo phan ng sau:

    2 Al(OH)3+ 3 H2SO4Al2(SO4)3+ 6 H2O

    Al2(SO4)3+ 6 NaOH 2Al(OH)3+ 3Na2SO4

    Sau o, ngi ta nung Al(OH)3thu c - Al2O3

    O

    xi

    t

    n

    h

    m

  • 8/13/2019 Tong Hop Xuc Tac Tren Chat Mang

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    Sn xut xc tctrn cht mang

    ZeoliteSilicagelOxit

    nhm

    Chuyen hoa - Al2O3 -Al2O3

    Thc hien nhiet o cao hn 11000C:

    - Al2O3Al2O3 -Al2O3

    Ta phai chuyen nh vay v trong mot so trng hp phai s dung xuc tac

    trang thai tang soi, ao tron manh b mai mon nhanh va co theloi cuon ra khoi vung phan ng.

    Can loai chat mang ac biet ran chac.

    O

    xi

    t

    n

    h

    m

  • 8/13/2019 Tong Hop Xuc Tac Tren Chat Mang

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    Sn xut xc tctrn cht mang

    ZeoliteSilicagelOxit

    nhm

    SAN XUAT KHOI TIEP XUC

    1/ Xuc tac GIAP-3

    Thanh phan(%khoi lng): -Al2O3(93%), - Al2O3(1,8%), NiO

    (5,1%)

    The tch xop: ~35%

    Be mat rieng: ~5 m2/g

    Mat o chat ong: ~1,0 g/cm3

    O

    xi

    t

    n

    h

    m

  • 8/13/2019 Tong Hop Xuc Tac Tren Chat Mang

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    Sn xut xc tctrn cht mang

    ZeoliteSilicagelOxit

    nhm

  • 8/13/2019 Tong Hop Xuc Tac Tren Chat Mang

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    Sn xut xc tctrn cht mang

    ZeoliteSilicagelOxit

    nhm

    2/ Khoi tiep xuc tang soi (FB)

    Dung e oxy hoa SO2trong lp tang soi.

    Chat xuc tac phai ac biet ran chac, v khi ao tron manh,

    no thng b mai mon nhanh va loi cuon ra khoi vung phan

    ng

    V du: S ton that Vanadi khi lam viec che o tang soi trong 1thang >8-10% so vi trong lng ban au.

    o ben c tang len ang ke khi s dung chat mang

    aluminosilicat.

    O

    xi

    t

    n

    h

    m

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    Sn xut xc tctrn cht mang

    ZeoliteSilicagelOxit

    nhm

    Khoi tiep xuc tang soi (FB)

    La dang hat hnh cau mau vang sam.

    Thanh phan (% khoi lng): V2O5>= 7 ; K2O >=7 ; Al2O3~ 4-6 ; SiO2~

    82-80

    The tch xop ~ 50%Be mat rieng ~ 20 m2/g

    o mai mon trong 1 thang

  • 8/13/2019 Tong Hop Xuc Tac Tren Chat Mang

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    Sn xut xc tctrn cht mang

    ZeoliteSilicagelOxit

    nhm

    Qua trnh thu chat xuc tac FB

    1- Chuan b dung dch aluminosufat.

    2- Thu chat mang hnh cau.

    3- Lam kho, nung chat mang hnh cau.

    4- Tam chat mang.5- Lam kho va xuc tac.

    O

    xi

    t

    n

    h

    m

  • 8/13/2019 Tong Hop Xuc Tac Tren Chat Mang

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    Sn xut xc tctrn cht mang

    ZeoliteSilicagelOxit

    nhm

  • 8/13/2019 Tong Hop Xuc Tac Tren Chat Mang

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    Cng thc chung c dng sau:M2/nO.Al2O3.xSiO2.yH2O

    trong n: ha tr ca ion kim loi Mx: t s mol SiO2/Al2O3y:s mol nc

    x : xc nh tnh cht v cu trc ca zeolite

    Zeolite l cc Aluminosilicate c cu trc tinh th h theokhng gian 3 chiu

    Sn xut xc tctrn cht mang

    ZeoliteSilicagelOxit

    nhm

    1. Cu trc zeolit :

    Z

    e

    o

    l

    i

    t

    e

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    Gi tr nht trong s xc tc zeolite l cc zeoliteA,X,Y v mt s khc .

    Zeolite A c x 2;X c x = 2,2-3

    Y c x = 3,1-5,0

    Zeolite tng hp thu c thng l zeolite -Na

    Sn xut xc tctrn cht mang

    ZeoliteSilicagelOxit

    nhm

    B khung ca zeolite cu trc vi hng trm khoangtng i ln, thng vi nhau qua ca s kchthc nh V d:Trong 1 gam zeolite c n

    3x1020

    khoang.Z

    e

    o

    l

    i

    t

    e

  • 8/13/2019 Tong Hop Xuc Tac Tren Chat Mang

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    Sn xut xc tctrn cht mang

    ZeoliteSilicagelOxit

    nhm

  • 8/13/2019 Tong Hop Xuc Tac Tren Chat Mang

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    Sn xut xc tctrn cht mang

    ZeoliteSilicagelOxit

    nhm

    Zeolite A Zeolite X,Y

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    2.c im

    -Zeolit bn nhit

    -bn trong quan h tip xc vi cht c, nh cc ionsulfua , cc hp cht cha nito

    -khng gy n mn thit b

    -b mt pht trin (800 m2/g)

    -kh nng trao i ion cao, bn c

    Sn xut xc tctrn cht mang

    ZeoliteSilicagelOxit

    nhm

    Z

    eo

    l

    i

    t

    e

  • 8/13/2019 Tong Hop Xuc Tac Tren Chat Mang

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    Trong mi loi zeolite c thnh phn, cu trc, bn

    cht cation, kiu phn b cation kh ng nht

    C cu trc xp ( th tch xp chim khong 50%V)

    B mt tip xc pha ln

    D dng to cc trung tm acid base khc nhau

    Sn xut xc tctrn cht mang

    ZeoliteSilicagelOxit

    nhm

    Z

    eo

    l

    i

    t

    e

  • 8/13/2019 Tong Hop Xuc Tac Tren Chat Mang

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    Sn xut xc tctrn cht mang

    ZeoliteSilicagelOxit

    nhm

    Cc l xp

  • 8/13/2019 Tong Hop Xuc Tac Tren Chat Mang

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    Hp ph c tnh chn lc rt cao

    D dng trao i ion

    Xc tc c hot tnh v chn lc cao

    Sn xut xc tctrn cht mang

    ZeoliteSilicagelOxit

    nhm

    Z

    eo

    l

    i

    t

    e

    3. ng dng ca zeolite

    Ngoi ra zeolite cn l cht mang to ra nhiu loi xc tc khc : xc tcbase, oxi ha kh

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    Sn xut xc tctrn cht mang

    ZeoliteSilicagelOxit

    nhm

    Mt phn t phn ng trn zeolite phi thc hincc bc sau: Khuch tn n b mt ca zeolit

    i vo mao qun qua cc ca s v khuchtn n trung tm hot ng Hp ph vo bn trong mao qun trn trungtm hot ng v hnh thnh hp cht trung gian

    ca phn ng Thc hin phn ng to sn phm Kh hp ph v khuch tn sn phm rangoi mao qun

    O i

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    4.Tng hp zeolite

    -Cc zeolite tng hp c th thu c bng phng

    php tng hp thy nhit dng cc tinh th vi kch

    thc c micromet

    -Vic tng hp cc zeolite dng Na+to ra kt ta

    alumosilicat ca baz v cui cng to kt ta.

    Sn xut xc tctrn cht mang

    ZeoliteSilicagelOxit

    nhm

    Z

    eo

    l

    i

    t

    e

    O it

  • 8/13/2019 Tong Hop Xuc Tac Tren Chat Mang

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    Sn xut zeolite dng vin

    Sn xut xc tctrn cht mang

    ZeoliteSilicagelOxit

    nhm

    Z

    eo

    l

    i

    t

    e

    Dd lmvic

    Kt tahydro

    aluminosilicat

    Kt tinhhydrogeltrong mt

    kim

    ra

    nh hnh

    x l nhit

    O it

  • 8/13/2019 Tong Hop Xuc Tac Tren Chat Mang

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    Sn xut xc tctrn cht mang

    ZeoliteSilicagelOxit

    nhm

    Z

    eo

    l

    i

    t

    e

    Nguyn liu

    silicat

    Al(OH)3 NaOH

    O it

  • 8/13/2019 Tong Hop Xuc Tac Tren Chat Mang

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    Sn xut xc tctrn cht mang

    ZeoliteSilicagelOxit

    nhm

    t nng dd lmvic

    NaOH si

    Al(OH)3

    H2O

    autoclave

    silicat

    H2O

    Hi qu nhit

    O it

  • 8/13/2019 Tong Hop Xuc Tac Tren Chat Mang

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    Sn xut xc tctrn cht mang

    ZeoliteSilicagelOxit

    nhm

    S O it

  • 8/13/2019 Tong Hop Xuc Tac Tren Chat Mang

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    Nhc im :

    -Vic thm cht kt dnh lm xu i c trng

    ng hc ca zeolite

    -V vy ngi ta mi tm kim k thut to vin

    zeolite khng c cht kt dnh.

    Sn xut xc tctrn cht mang

    ZeoliteSilicagelOxit

    nhm

    Z

    eo

    l

    i

    t

    e

    S t t Oxit

  • 8/13/2019 Tong Hop Xuc Tac Tren Chat Mang

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    Sn xut zeolite dng vin khng cha cht kt dnh

    Sn xut xc tctrn cht mang

    ZeoliteSilicagelOxit

    nhm

    Z

    eo

    l

    i

    t

    e

    S t t Oxit

  • 8/13/2019 Tong Hop Xuc Tac Tren Chat Mang

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    4.a xc tc vo cht mang zeoliteCc phng php s dng :

    Sn xut xc tctrn cht mang

    ZeoliteSilicagelOxit

    nhm

    Z

    eo

    l

    i

    t

    e

    trao i ion

    tm

    hp ph t pha kh hay a vo tkhu tng hp zeolite

    hp ph hi kim loi

    S t t Oxit

  • 8/13/2019 Tong Hop Xuc Tac Tren Chat Mang

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    Phng php x l zeolite:

    3 phng php

    Sn xut xc tctrn cht mang

    ZeoliteSilicagelOxit

    nhm

    Z

    eo

    l

    i

    t

    eTrao iion Tmzeolite Tnghp

    S t t Oxit

  • 8/13/2019 Tong Hop Xuc Tac Tren Chat Mang

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    Trao i ion

    Mc ch:

    -thay th cc ion Na+ bi cc ion nguyn tkhc hay H+

    -Bng phng php ny c th a vocu trc zeolite cc kim loi nh Ni, Pt

    Sn xut xc tctrn cht mang

    ZeoliteSilicagelOxit

    nhm

    Z

    eo

    l

    i

    t

    e

    S t t Oxit

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    Nhn xt:

    -S phn b tt nht kim loi c th t c

    trong trng hp : trc giai on kh phi khht nc trong zeolite.

    -Trong qu trnh kh cc mu ngi ta nhnthy c s di chuyn kim loi t th tch ca

    tinh th zeolite n b mt bn trong ca chngv to ra cc kim loi dng khi. Dc theokhoang s di chuyn ca kim loi trong zeolitec sp xp theo dy sau: Ag>Pb>Cu>Ni > Pt

    Sn xut xc tctrn cht mang

    ZeoliteSilicagelOxit

    nhm

    Z

    eo

    l

    i

    t

    e

    Sn xut xc tc Oxit

  • 8/13/2019 Tong Hop Xuc Tac Tren Chat Mang

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    Tm zeolite

    c thc hin bng mt s dung dch hu c hay

    v c cha hp cht cc kim loi m c th tch

    thnh kim loi khi x l nhit nhit thp hn

    nhit bn ca tinh th do vy thng s dng

    cacbonat v hydrocacbonat ca Fe, Co, Ni, Cr....

    Sn xut xc tctrn cht mang

    ZeoliteSilicagelOxit

    nhm

    Z

    eo

    l

    i

    t

    e

    Sn xut xc tc Oxit

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    Tng hp

    Mc ch:a cu t hot ng vo xc tc t lctng hp zeolite

    Phm vi s dng:

    Khi c kh nng a cc cu t xc tchot ng vo mng tinh th.

    u im:- C th thu cht xc tc sau phn ng- Xc tc c chn lc cao

    Sn xut xc tctrn cht mang

    ZeoliteSilicagelOxit

    nhm

    Z

    eo

    l

    i

    t

    e

    Sn xut xc tc Oxit

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    Sn xut xc tctrn cht mang

    ZeoliteSilicagelOxit

    nhm

    Ngun ti liu :

    Bi ging k thut xc tc - Mai Hu Khimwww.Wikipedia.comwww.china-silicagel.net

    www.sciences.com

    http://www.china-silicagel.net/http://www.china-silicagel.net/http://www.china-silicagel.net/http://www.china-silicagel.net/