Dab tsi yog activated carbon tshwj xeeb rau kev kho biogas?

Hais txog kev siv cov pa roj carbon activated hauv biogas desulfurization (tshem tawm hydrogen sulfide), qhov no yog qhov teeb meem tshwj xeeb thiab siv tau. Xaiv txoj cai activated carbon yog tus yuam sij kom ntseeg tau tias desulfurization efficiency, ncua kev pab cuam lub neej thiab tswj cov nqi.

Zuag qhia tag nrho, impregnated activated carbon yog qhov kev xaiv zoo tshaj plaws rau biogas desulfurization. Nws tshem tawm H₂S los ntawm cov tshuaj tiv thaiv catalytic, thiab nws cov txiaj ntsig zoo dua li cov pa roj carbon activated uas tsuas yog siv lub cev adsorption.

Iodine-impregnated activated carbon (feem ntau siv thiab ua tau zoo tshaj)

Lub hauv paus ntsiab lus ua haujlwm: Iodine ua raws li lub zog rau catalytically oxidize H₂S rau hauv cov ntsiab lus sulfur (S) lossis sulfuric acid (H₂SO₄) nyob rau hauv qhov kub thiab txias thiab aerobic.

Cov tshuaj formula: H₂S + ½O₂ → S + H₂O lossis H₂S + 2O₂ → H₂SO₄

Qhov zoo

High sulfur muaj peev xwm: Nws muaj peev xwm nqa sulfides thiab ua haujlwm ntev.

Kev ua kom nrawm: Nws tuaj yeem ua tiav cov txiaj ntsig tshem tawm sai.

Strong adaptability: Tsis rhiab rau qhov hloov pauv ntawm qhov kub thiab txias.

Applicable scenarios: The vast majority of biogas projects, especially those with high H₂S concentrations (>1000 ppm) los yog xav tau qhov hluav taws xob tsawg heev (<50 ppm).

2. Alkaline impregnated activated carbon (xws li KOH/NaOH impregnated)

Lub hauv paus ntsiab lus ua haujlwm: Los ntawm cov tshuaj tiv thaiv tsis zoo, H₂S reacts nrog alkali tsim sulfide ntsev.

Cov tshuaj formula: H₂S + 2NaOH → Na₂S + 2H₂O

Qhov zoo

Nws muaj cov txiaj ntsig zoo thaum pib tshem tawm ntawm siab -concentration H₂S.

Nws tuaj yeem tshem tawm ib feem ntawm cov pa roj carbon dioxide (CO₂) thiab nce tus nqi calorific ntawm biogas.

Qhov tsis zoo

Lub peev xwm sulfur feem ntau qis dua li ntawm iodine -impregnated carbon vim tias cov khoom siv tshuaj tiv thaiv tuaj yeem txhaws cov kab.

Hauv qhov chaw ntub dej, alkali tuaj yeem raug ntxuav tawm.

Cov xwm txheej siv tau: Nws yog qhov tsim nyog rau kev ua haujlwm uas qhov concentration ntawm H₂S fluctuates zoo heev thiab acidity ntawm biogas muaj zog.

3. Hlau oxide-impregnated activated carbon (xws li Fe₂O₃, ZnO

Txoj hauv kev ua haujlwm: ruaj khov hlau sulfides yog tsim los ntawm cov tshuaj tiv thaiv.

Cov tshuaj formula: H₂S + ZnO → ZnS + H₂O

Qhov zoo: Cov tshuaj tiv thaiv yog irreversible thiab qhov raug tshem tawm yog siab.

Qhov tsis zoo: Cov khoom siv ua haujlwm tsis yog- rov ua dua tshiab, qhov muaj peev xwm ntawm cov sulfur raug txwv, thiab tus nqi kuj tseem siab.

Cov xwm txheej siv tau: Feem ntau yog siv rau kev nplua desulfurization, thiab siv tsawg dua hauv thaj chaw biogas.

Ii. Cov Ntsiab Lus Xaiv Qhov Ntsuas
Thaum xaiv cov pa roj carbon activated, cov ntsuas lub cev thiab tshuaj lom neeg hauv qab no yuav tsum tau txiav txim siab zoo:

1. Pore qauv (tseem ceeb)

Give priority to activated carbon with well-developed mesopores (mesoporous pores). The products of H₂S catalytic oxidation reaction (elemental sulfur or sulfuric acid) have a relatively large molecular volume and require sufficient mespores (2-50 nm) as "reaction sites" and "transport channels". Macropores (>50 nm) yog qhov tsim nyog rau kev nthuav dav ntawm cov khoom siv thiab cov khoom siv.

Tsis txhob siv cov pa roj carbon activated uas yog tsim los ntawm micropores. Micropores (<2 nm) are prone to being clogged by reaction products, leading to rapid deactivation of activated carbon.

2. Mechanical zog

High -lub zog activated carbon yuav tsum tau xaiv. Hauv ib qho chaw ruaj khov - txaj adsorption ntauwd, cov pa roj carbon activated tau raug lub siab los ntawm cov khoom siv sab saud thiab kev sib txhuam los ntawm cov pa roj. Tsawg- lub zog ua kom cov pa roj carbon monoxide yog qhov ua rau pulverization, uas ua rau muaj zog hauv txaj tsis kam (nce siab poob), thiab tej zaum yuav txhaws cov kav dej thiab puas rov qab- cov khoom siv kawg.

Cov cim tseem ceeb: Hardness ntawm lub pob disc Ntau dua lossis sib npaug li 95%. Qhov no yog ib qho tseem ceeb heev qhia txog kev lag luam.

3. Carbon tetrachloride adsorption tus nqi (CTC tus nqi) lossis iodine adsorption nqi

Rau cov pa roj carbon impregnated, tus nqi CTC lossis iodine tus nqi tsis yog thawj qhov taw qhia, vim nws cov haujlwm tseem ceeb yog tshuaj catalysis es tsis yog lub cev adsorption.

Cov pa roj carbon activated nrog qhov nruab nrab CTC tus nqi (xws li 50%-70%) tab sis zoo- impregnated thiab nrog zoo-tsim mespores muaj qhov ua tau zoo desulfurization zoo tshaj qhov uas muaj CTC siab tab sis tsis impregnated lossis nrog cov micropores zoo tsim.

4. Cov ntsiab lus noo noo

Biogas feem ntau saturated nrog dej vapor Ib theem ntawm cov av noo yog qhov zoo rau catalytic oxidation cov tshuaj tiv thaiv vim dej molecules ua qhov nruab nrab rau cov tshuaj tiv thaiv.

Txawm li cas los xij, cov dej noo ntawm cov pa roj carbon activated thaum lub sij hawm tawm hauv lub Hoobkas yuav tsum tau tswj kom tsim nyog (xws li tsawg dua 5%) kom tsis txhob muaj qhov hnyav thiab cov nqi thauj mus los.

5. Tej qhov ntom ntom

Qhov ntau qhov ntom ntom cuam tshuam rau lub ntim ntim thiab cov khoom tsim. Raws li qhov ua tau raws li qhov xav tau ntawm kev ua tau zoo, qhov nruab nrab heap ntom txaus txaus.

6. tus nqi pH

Rau cov pa roj carbon impregnated, tus nqi pH feem ntau yog txiav txim siab los ntawm cov tshuaj impregnating (iodine-impregnated carbon tej zaum yuav nruab nrab lossis tsis muaj zog acidic, thaum alkaline impregnated carbon yog alkaline).

Summary thiab xaiv cov lus qhia
Feature pom zoo xaiv (nyiam dua): Lwm txoj kev daws teeb meem tsis pom zoo
Hom: Iodine-impregnated activated carbon, alkali-impregnated activated carbon, nquag unimpregnated activated carbon
Cov mesopores tau zoo-tsim, cov qauv ntawm nruab nrab thiab macropores yog qhov tsim nyog, thiab micropores tseem ceeb
Lub zog ua haujlwm siab (pob disk hardness Ntau dua lossis sib npaug li 95%), nruab nrab lub zog, tsis tshua muaj zog, nquag ua hmoov
Cov ntsuas tseem ceeb, muaj peev xwm sulfur (thov cov ntaub ntawv no los ntawm tus neeg muag khoom), CTC tus nqi thiab pH tus nqi, tsuas yog saib tus nqi iodine adsorption.
Cov lus qhia zaum kawg rau koj

Hu rau tus neeg muag khoom siv hluav taws xob ncaj qha thiab qhia meej rau lawv tias koj daim ntawv thov yog "biogas desulfurization".

Nug lawv yog tias lawv muaj qhov tshwj xeeb "iodine-impregnated activated carbon rau biogas desulfurization".

Thov lub rooj parameter ntawm cov khoom los ntawm tus neeg muag khoom, nrog rau kev tsom mus rau: iodine impregnation tus nqi, leej faj muaj peev xwm, txhua yam muaj zog (pob disk hardness), thiab pore qauv piav qhia.

Kev ua haujlwm zoo sib xws: Tib lub sijhawm, qhia rau tus neeg muag khoom ntawm koj qhov kev ua haujlwm tshwj xeeb, xws li qhov nkag siab ntawm H₂S hauv biogas, qhov xav tau qhov hluav taws xob qhov hluav taws xob, roj ntws tus nqi, kub thiab siab. Lawv yuav muab koj cov qauv tsim nyog tshaj plaws thiab cov lus qhia ntau npaum li cas.

Los ntawm kev ua raws li cov lus qhia saum toj no, koj tuaj yeem xaiv cov khoom siv tau zoo, txuag hluav taws xob thiab ruaj khov ua kom cov pa roj carbon zoo nyob rau hauv lub hom phiaj kom ntseeg tau tias kev ua haujlwm ruaj khov ntawm biogas desulfurization system.