Enkola y’okugezesa Boehmite mu bujjuvu

Boehmite, eky’obugagga ekikulu eky’eby’obuggagga eby’omu ttaka ekikola ku aluminiyamu-, kikozesebwa nnyo mu biwanirizi by’ekirungo ekiziyiza, ebizigo ebyawula bbaatule za lithium, ne mu bikozesebwa mu kukola keramiki. Okukakasa nti obulongoofu bwayo, ensengekera ya kirisitaalo, n’ebintu byayo ebirabika bituukana n’omutindo gw’amakolero, enkola y’okugezesa entegeke yeetaagibwa okulondoola omutindo. Wammanga ge mitendera emikulu n’ensonga ez’ekikugu ez’okugezesa boehmite.

I. Okusooka okujjanjaba sampuli

Sampuli za Boehmite zirina okusooka okulongoosebwa nga tezinnaba kukeberebwa okukakasa nti ebivudde mu kwekenneenya bituufu. Okusooka, sena sampuli embisi okutuuka ku bugonvu bwa 200 mesh oba okusingawo ng’okozesa ekyuma ekisekula n’ogikaza mu oven ku 105℃-110℃okumala essaawa 2 okuggyamu obunnyogovu obunywezeddwa. Singa okugezesebwa kuzingiramu ebibinja ebikola ku ngulu oba obucaafu obw’obutonde, okwongera okuyonja ne ethanol atalina mazzi n’okukala mu vacuum kyetaagisa okuziyiza ekizimbulukusa ekisigadde okutaataaganya okwekenneenya okuddirira.

II. Okugezesa Ebintu Ebirabika
1.Ensaasaanya y’obunene bw’obutundutundu: Ekintu ekikebera obunene bw’obutundutundu bwa layisi (nga Malvern Mastersizer) kikozesebwa okupima obunene bw’obutundutundu bw’obutundutundu bwa boehmite. D50 (median diameter) etera okufugibwa wakati wa 0.5 ne 5 μm okutuukiriza ebyetaago by’embeera ez’enjawulo ez’okukozesa.

2.Ekitundu eky’okungulu ekigere: Ekitundu ky’okungulu ekigere kipimibwa nga tukozesa enkola ya BET ey’okusikiriza nayitrojeni (nga Micromeritics ASAP 2020). Boehmite ow’obulongoofu obw’amaanyi-mutera okuba n’obuwanvu obw’enjawulo obwa m2/g 5 ku 20, ekikosa butereevu emirimu gy’okutabula n’obumu bw’okusiiga.

3.Crystal Morphology: Scanning electron microscopy (SEM) ekozesebwa okwetegereza enkula y’obutundutundu. Boehmite etera okulaga ensengekera eringa eya flake- oba fibrous. Okukwatagana kw’enkula (morphological consistency) kiraga kikulu ku nkola za waggulu-enkomerero.

III. Okwekenenya Ebirungo by’Eddagala n’Obulongoofu
1.Chemical Composition: Okwekenenya obungi bw’ebirimu Al2O3 kukolebwa nga tukozesa X-ray fluorescence spectroscopy (XRF) oba inductively coupled plasma optical emission spectroscopy (ICP-OES). Boehmite ow’omutindo gw’amakolero- yeetaaga obulongoofu bwa Al2O3 obusinga oba obwenkana 95%, ate boehmite ow’obulongoofu obw’amaanyi- yeetaaga obulongoofu obusinga oba obwenkana 99%.

2.Okuzuula obucaafu: ICP-MS oba atomic absorption spectroscopy (AAS) ekozesebwa okuzuula obucaafu obutonotono nga SiO2, Fe2O3, ne Na2O. Ebirimu birina okukoma ennyo okwewala okukosa eby’obugagga by’ebintu.

IV. Obubonero bw’ensengekera ya kirisitaalo
1.X-ray Diffraction (XRD): Entiiko za Bragg diffraction zikozesebwa okukakasa -AlOOH crystal form ya boehmite n’okubalirira℃ya crystallinity. Standard boehmite eraga entikko z'okuwunyiriza ez'engeri mu 2θ range ya diguli 14 okutuuka ku diguli 35 . Okubeerawo kw’obucaafu (nga -Al2O3) kuyinza okulaga okusukkiridde-okusiimuula.

2.Thermogravimetric Analysis (TGA): Okubuguma okutuuka ku diguli 1000 mu bbanga ly’empewo n’okulondoola enkola y’okugejja. Boehmite etera okuvunda n’efuuka -Al2O3 wakati wa diguli 300 ne diguli 500 . Omuwendo gw’okugejja guyinza okukozesebwa okukakasa ebirimu hydroxyl.

V. Okugezesa emirimu (Okusalawo) .

Ku nkola ezenjawulo, okupima pH (ebiseera ebisinga 7-9), okugezesa okunyiga amafuta (okukebera okusaasaana), oba okwekenneenya obuziba (nga mercury intrusion porosimetry) nabyo biyinza okwetaagisa okutuukiriza ebyetaago ebitongole eby’ebiwanirizi bya katalisiti oba ebintu bya bbaatule.

Mu bufunze, enkola y’okugezesa boehmite yeetaaga okwekenneenya okw’ebitundu ebingi-nga kugatta okwekenneenya okw’omubiri, eddagala, n’okw’ekiristaayo okukakasa nti omulimu gutebenkedde era gwesigika n’okuwa okukakasa omutindo ku nkola eziri wansi w’omugga.