Ib, foreword

Hmoov metallurgy tuam txhab feem ntau yuav tsum tau siv hydrogen raws li qhov txo cov txheej txheem roj thaum sintering lub workpiece.Txawm li cas los xij, cov txheej txheem ib txwm muaj ntawm hydrogen ntau lawm los ntawm ammonia decomposition yog ntau thiab ntau tsis tuaj yeem ua tau raws li cov kev cai ntawm lub teb chaws thiab kev lag luam rau kev ruaj ntseg tsim vim muaj kev nyab xeeb zoo heev.Txhawm rau ua kom muaj kev nyab xeeb ntawm kev tsim khoom, cov tuam txhab thiab cov tswj hwm kev nyab xeeb tau tsom mus rau yuav ua li cas kom muaj kev nyab xeeb thiab siv cov roj hydrogen txo qis raws li kev tshawb nrhiav thiab kev txhim kho, thiab hauv qee qhov chaw, cov tuam txhab tau txwv tsis pub siv cov khoom siv ammonia decomposition.

Raws li cov yam ntxwv ntawm cov hmoov metallurgy cov tuam txhab, peb lub tuam txhab tau tsim ib hom tshiab methanol uas tsis tshua muaj kub cracking hydrogen ntau lawm cov khoom, tshwj xeeb tshaj yog muab cov hmoov metallurgy tuam txhab uas muag nrog kev nyab xeeb thiab txhim khu kev qha hydrogen ntau lawm cov khoom, kom cov lag luam tau txais hydrogen txo cov txheej txheem roj. muaj kev nyab xeeb dua.Nws txoj hauv kev ua haujlwm thiab cov yam ntxwv tau qhia raws li hauv qab no.

2. Kev taw qhia luv luv rau txoj hauv kev ua haujlwm ntawm cov tshuaj methanol tshiab tawg hydrogen ntau lawm

1. Qhov sib npaug ntawm cov tshuaj ammonia decomposition rau hydrogen ntau lawm yog raws li nram no:

2NH3 = 3H2 + N2 (decomposition kub 780 ~ 850 ℃)

2. Sib txawv ntawm cov txheej txheem hydrogen ntau lawm ntawm ammonia decomposition, cov txheej txheem tshiab hydrogen siv methanol cracking los tsim hydrogen.Methanol cracking cov tshuaj tiv thaiv thiab carbon monoxide hloov dua siab tshiab tshwm sim los ntawm catalyst nyob rau hauv tej yam kub thiab siab tej yam kev mob, uas yog ib tug gas-khoom catalytic cov tshuaj tiv thaiv.

CH3OH = 2H2 + CO (qhov kub thiab txias 240 ~ 280 ℃)

H2 thiab CO tsim los ntawm cov tshuaj tiv thaiv tawg yog txo cov pa roj carbon monoxide, CO tuaj yeem ua lub luag haujlwm hauv kev txo thiab tiv thaiv cov khoom ua haujlwm hauv qhov cub, ua ntej lub qhov cub thiab cov pa oxygen hauv huab cua los tsim CO2 diffusion mus rau hauv cov huab cua, tom qab ntau xyoo hauv kaum ob. manufacturers tau ua pov thawj tias kev siv tus neeg teb xov tooj yuav tsis ua rau muaj kev phom sij rau lub cev.

Iii.Cov yam ntxwv kev nyab xeeb ntawm cov txheej txheem tshiab methanol cracking hydrogen ntau lawm 1. Cov yam ntxwv kev nyab xeeb ntawm cov khoom siv raw siv hauv hydrogen ntau lawm txawv:

Methanol yog kua nyob rau hauv chav tsev kub, thiab nws tsis yooj yim rau volatilize sai sai thiab diffuse nyob rau hauv cov huab cua, thaum ammonia yog ib tug tshuaj lom thiab flammable roj txaus ntshai.Cov kua ammonia yog ib qho yooj yim rau volatilize thiab diffuse nyob rau hauv cov huab cua, thiab qhov tshwm sim ntawm to yog unimaginable.Yog li ntawd, cov tuam txhab lag luam yuav tsum tau ua nrog cov txheej txheem tshwj xeeb rau kev siv cov kua ammonia ua ntej nws tuaj yeem siv tau.Methanol tsis corrosive thiab tsis ntshai kev sib cuag nrog tib neeg daim tawv nqaij.Tsuav nws tsis qaug cawv los ntawm kev yuam kev, nws yuav tsis ua mob rau tib neeg.Ammonia yog corrosive thiab muaj kev phom sij rau tib neeg cov tawv nqaij thiab qhov muag, yog li methanol muaj kev nyab xeeb dua rau kev siv.

2. Kev khaws cia ntawm cov khoom siv raw siv hauv cov khoom siv hydrogen tsis xav tau cov hlab ntsha siab

Cov kua ammonia xav tau cov hlab ntsha tshwj xeeb rau kev khaws cia, uas yuav tsum muaj kev tswj xyuas nruj xws li cov ntaub ntawv, kev txheeb xyuas thiab kev saib xyuas cov hlab ntsha siab rau cov kua ammonia cia raws li kev tswj xyuas kev nyab xeeb.Methanol tsuas tuaj yeem khaws cia rau hauv qhov kub thiab txias ntim, tsis muaj lub thawv tshwj xeeb.

3. Qhov kev pheej hmoo ntawm cov pa taws hluav taws xob yog zam nyob rau hauv cov txheej txheem ntawm hydrogen ntau lawm

Methanol cracking kub yog tsawg.Nws tsuas yog xav tau 240 ~ 280 ℃ rau methanol kom tawg, uas yog qis dua qhov decomposition kub ntawm ammonia decomposition los tsim hydrogen (siab dua 800 ℃).Nyob rau hauv txoj kev no, cov cua kub thiab cov reactor yuav tsis raug hlawv, thiab cov hydrogen yuav tsis hlawv los ntawm lub tank thiab khiav tawm ntawm nws, ua rau ignition los yog txawm tawg.Kev phom sij ntawm cov pa taws hluav taws xob yog zam tag nrho.

4. Tus nqi khiav lag luam ntawm cov khoom siv methanol qis qis qis qis vim tias methanol tsis tshua muaj kub tawg (240 ~ 280 ℃), thiab cov tshuaj tiv thaiv kub tsuas yog 1/3 ntawm cov ammonia decomposition, yog li cov nqi khiav lag luam tsawg dua ib nrab ntawm uas ntawm ammonia decomposition khoom, yog li nws kuj yog ib tug ntau zog txuag khoom.

5. Methanol kev yuav khoom yooj yim dua

Methanol tau yooj yim muaj nyob txhua qhov chaw hauv khw tshuaj lom neeg hauv zos.

Plaub, xaus

Los ntawm kev soj ntsuam saum toj no, nws tuaj yeem pom tau tias kev siv cov khoom siv methanol tawg hydrogen tshiab muaj cov txiaj ntsig hauv qab no:

Lub pyrolysis kub ntawm methanol yog tsawg, yog li lub neej kev pab cuam ntawm cov cuab yeej siv ntev dua, muaj kev nyab xeeb thiab cov nqi khiav lag luam qis dua.Methanol yog ib qho yooj yim mus yuav thiab khaws cia.Nyob rau tib lub sijhawm, methanol tsis corrosive, volatile thiab diffusible, tsis zoo li cov kua ammonia, nws xav tau cov ntim tshwj xeeb rau kev khaws cia, thiab ib zaug xau, yuav muaj kev phom sij loj.

Tshiab methanol cracking hydrogen ntau lawm cov cuab yeej ntawm peb lub tuam txhab nyob rau hauv shandong, jiangsu, zhejiang thiab lwm yam ntau qhov chaw ntawm kaum ob ntawm cov hmoov metallurgy enterprise siv, tsis tsuas yog los ntawm kiag li txaus siab rau qhov txo qhov cua ntawm hydrogen technology indicators, As raug txo, cov khoom tshiab thiab txheej txheem txheej txheem tsis muaj teeb meem ib puag ncig tshiab, tshwj xeeb tshaj yog hauv kev tshem tawm kev lag luam kev ruaj ntseg zais kev phom sij yog qhov zoo, Pab cov tuam txhab txhim kho kev tswj hwm kev nyab xeeb.Kev tswj hwm kev tsim khoom nyab xeeb yog qhov tseem ceeb tshaj plaws ntawm kev lag luam.Peb ntseeg hais tias los ntawm kev koom tes ntawm ntau thiab ntau tus neeg ua haujlwm, kev npaj muaj kev nyab xeeb dua thiab siv cov roj txo hydrogen yuav raug npaj rau cov khoom lag luam hmoov hlau metallurgy, kom ntseeg tau tias cov tuam txhab ua haujlwm tau txais txiaj ntsig zoo rau lub zej zog raws li qhov chaw muaj kev nyab xeeb.