Detailed introduction

ACH-10 catalyst used for selective hydrogenation of acetylene to ethylene has been successfully used in several industrial units. It is suitable for acetylene conversion in both two-stage process and three-stage process.

Physical and chemical properties

2.reference operating conditions:

Space velocity                                2000-8000h-1

Hydrogen to acetylene ratio（V/V）     0.8-2.6：1                                 

Outlet acetylene content                    ≤1×10-6

Regeneration cycle                           2-6months

Service lifetime                               2-5years

3.operating condition claims

3.1 when the content of acetylene reaches 1.2-2.5（%），three-stage hydrogenation is necessary.

First –reactor:

Pressure                                  1.0-4.0Mpa

Inlet temperature                        35-90℃

Space velocity                          2000-8000h-1

H₂ to acetylene ratio（v/v）        0.8-1.2：1

Acetylene conversion rate            30-55%

Ethylene plus                            0.00-0.50 %

Regenaeration cycle                    2months min

Catalyst service lifetime              2-5years

Second-reactor

Pressure                                  1.0-4.0Mpa

Inlet acetylene                         0.60-1.1 %

Inlet temperature                      40-90℃

Space velocity                         2000-8000h-1

H₂ to acetylene ratio（v/v）     0.9-1.4：1

Acetylene conversion rate         60-90%

Outlet acetylene                       0.10-0.30%

Regeneration cycle                   3-6months

Catalyst service lifetime             2-5years

Third reactor

Pressure                              1.0-4.0Mpa

Inlet acetylene                        0.10-0.3%

Inlet temperature                     40-90℃

Space velocity                      2000-8000h-1

H₂ to acetylene ratio（v/v）          1.5-2.6：1

Outlet acetylene                     1×10-6 max

Regeneration cycle                   4-7months

Catalyst service lifetime              4-6years

3.2 When the content of acetylene reaches 1.0-1.9（%），two-stage hydrogenation will do well.

First –reactor:

Pressure                             1.0-4.0Mpa

Inlet temperature                     40-90℃

Space velocity                      2000-8000h-1

H₂ to acetylene ratio（v/v）          1.0-1.4：1

Acetylene conversion rate             40-90%

Outlet acetylene                    0.15-0.45%     

Ethylene plus                        0.00-0.50%

Regeneration cycle               3-6months min

Catalyst service lifetime              2-5years

Second-reactor

Pressure                           1.0-4.0Mpa

Inlet acetylene                    0.10-0.45 %

Inlet temperature                   45-90℃

Space velocity                    2000-8000h-1

H₂ to acetylene ratio（v/v）       1.2-2.6：1

Acetylene conversion rate           60-90%

Outlet acetylene                  1×10-6max

Regeneration cycle               3-6months

Catalyst service lifetime          4-6years

3.31 When the content of acetylene is lower than 0.6（V%），one-stage hydrogenation is enough.

Pressure                            1.0-4.0Mpa

Inlet acetylene                    0.10-0.45 %

Inlet temperature                   45-90℃

Space velocity                    2000-8000h-1

H₂ to acetylene ratio（v/v）       1.2-2.6：1

Acetylene conversion rate           60-90%

Outlet acetylene                   1×10-6max

Regeneration cycle                 3-5months

Catalyst service lifetime            4-6years