초록 ▼

A two stage low temperature adsorptive separation process for removing HCl and H2S from a catalytic reforming offgas to make the offgas useful as a feed to a steam reforming process. In the first stage the offgas is passed through a molecular sieve bed that adsorbs HCl selectively. In the second bed

A two stage low temperature adsorptive separation process for removing HCl and H2S from a catalytic reforming offgas to make the offgas useful as a feed to a steam reforming process. In the first stage the offgas is passed through a molecular sieve bed that adsorbs HCl selectively. In the second bed the HCl depleted offgas is passed through a zinc oxide bed to remove the H2S. The H2S and HCl content of the offgas are reduced to levels that do not significantly poison the catalysts used in the steam reforming process.

대표청구항 ▼

A substantially continuous adsorptive separation process for removing HCl and H2S from a catalytic reforming offgas that contains less than about 10 ppm each of HCl and H2S to make the offgas useful as a feedgas for a steam reforming process comprising: (a) passing the offgas at a temperature in the

A substantially continuous adsorptive separation process for removing HCl and H2S from a catalytic reforming offgas that contains less than about 10 ppm each of HCl and H2S to make the offgas useful as a feedgas for a steam reforming process comprising: (a) passing the offgas at a temperature in the range of about 40°C. to 70°C. through a molecular sieve or activated alumina bed that adsorbs HCl selectively from the offgas, and (b) thereafter passing the HCl-depleted offgas at said temperature through a zinc oxide bed that adsorbs H2S from the offgas, whereby HCl and H2S are removed from the offgas to an extent that the HCl and H2S contents of the offgas leaving the beds are below that which would significantly poison a steam reforming catalyst. A substantially continuous adsorptive separation process for removing HCl and H2S from a catalytic reforming offgas that contains less than about 10 ppm each of HCl and H2S to make the offgas useful as a feedgas for a steam reforming process comprising: (a) passing the offgas at a temperature in the range of about 40°C. to 70°C. through an activated alumina bed that adsorbs HCl selectively from the offgas, and (b) thereafter passing the HCl-depleted offgas at said temperature through a zinc oxide bed that adsorbs H2S from the offgas, whereby HCl and H2S are removed from the offgas to an extent that the HCl and H2S contents of the offgas leaving the beds are below that which would significantly poison a steam reforming catalyst.