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Dokumen tersebut membahas tentang katalis kimia. Katalis dapat mempercepat reaksi kimia tanpa mengalami perubahan sendiri, dan tidak mengubah kesetimbangan reaksi. Contoh aplikasi katalis adalah sintesis metanol dan reaksi water gas shift yang menggunakan katalis ZnO/Cr2O3 dan besi oksida. Katalis dapat menurunkan energi aktivasi suatu reaksi melalui mekanisme fisika atau kimia. Ter

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Kelompok 2 DefryPurwadin P. 265806/11915 Monica Garby S. SitiUtami 269625/PA/12005 ErsaSaktiKinasih 269605/PA/11997 Medya Riana Happy /PA/12233

katalisadalahsuatusenyawakimia yang dapatmengarahkansekaligusmeningkatkankinetikasuatureaksi (jikareaksitersebutsecaratermodinamikamemungkinkanterjadi). Namunsenyawatersebut (katalis) tidakmengalamiperubahankimiawidiakhirreaksi, dantidakmengubahkedudukankesetimbangankimiadarireaksi.

definisi lain tentangkatalisdiantaranya: katalismempercepatreaksi yang menuruttermodinamikadapatberlangsung. katalismempercepatreaksimencapaikesetimbangan, tetapitidakmengubahkesetimbangan. Untukreaksiparalel, katalistertentuhanyamempercepatsatureaksisaja.

Contohproseskimia yang sangatpentingmisalnyasintesismetanoldarisyngas (CO dan H2) dikatalisisolehZnO/Cr2O3, danreaksiwater gas shift (WGS), CO + 2H2O == CO2 + H2dikatalisisolehbesioksidaatauoksidacampuran Zn, Cu maupun Cr.

Dalamkazanahenergireaksi, katalismenurunkanrintanganenergiataumenurunkanbesaranenergiaktifasisebuahreaksimelaluianekamekanismefisikawimaupunkimiawi.

Komponenintikatalis Selektifitas Stabilitas Aktifitas

Pengelompokankatalis homogen : artinyaadalahkatalis yang memilikiataubisamembentuksatufasadenganreaktandanpelarutnya (misalfasacair-cairpadasistemkatalisasamuntukreaksiesterifikasi) heterogentidakmemilikifasa yang samadenganreaktanmaupunpelarut (misalnyafasapadat-cairpadasistemkataliszeolituntukperengkahanhidrokarbon)

Contoh katalis homogen. Kompleks phosphine-logam transisi (Zn) sebagai katalis reaksi kopling CO2 dan epoksida serta mekanisme reaksinya.

Contohkatalisheterogen. Alloy nanokristal Cu-Zn-Al denganaditiflogamtransisiuntukkatalissintesisdimetil ether darisyngas.

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1. Kelompok 2 DefryPurwadin P. 265806/11915 Monica Garby S. SitiUtami 269625/PA/12005 ErsaSaktiKinasih 269605/PA/11997 Medya Riana Happy /PA/12233

2. katalisadalahsuatusenyawakimia yang dapatmengarahkansekaligusmeningkatkankinetikasuatureaksi (jikareaksitersebutsecaratermodinamikamemungkinkanterjadi). Namunsenyawatersebut (katalis) tidakmengalamiperubahankimiawidiakhirreaksi, dantidakmengubahkedudukankesetimbangankimiadarireaksi.

3. definisi lain tentangkatalisdiantaranya: katalismempercepatreaksi yang menuruttermodinamikadapatberlangsung. katalismempercepatreaksimencapaikesetimbangan, tetapitidakmengubahkesetimbangan. Untukreaksiparalel, katalistertentuhanyamempercepatsatureaksisaja.

4. Contohproseskimia yang sangatpentingmisalnyasintesismetanoldarisyngas (CO dan H2) dikatalisisolehZnO/Cr2O3, danreaksiwater gas shift (WGS), CO + 2H2O == CO2 + H2dikatalisisolehbesioksidaatauoksidacampuran Zn, Cu maupun Cr.

5. Dalamkazanahenergireaksi, katalismenurunkanrintanganenergiataumenurunkanbesaranenergiaktifasisebuahreaksimelaluianekamekanismefisikawimaupunkimiawi.

6. Komponenintikatalis Selektifitas Stabilitas Aktifitas

7. Pengelompokankatalis homogen : artinyaadalahkatalis yang memilikiataubisamembentuksatufasadenganreaktandanpelarutnya (misalfasacair-cairpadasistemkatalisasamuntukreaksiesterifikasi) heterogentidakmemilikifasa yang samadenganreaktanmaupunpelarut (misalnyafasapadat-cairpadasistemkataliszeolituntukperengkahanhidrokarbon)

8. Contoh katalis homogen. Kompleks phosphine-logam transisi (Zn) sebagai katalis reaksi kopling CO2 dan epoksida serta mekanisme reaksinya.

9. Contohkatalisheterogen. Alloy nanokristal Cu-Zn-Al denganaditiflogamtransisiuntukkatalissintesisdimetil ether darisyngas.

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