Method and system for producing methanol using partial oxidation

摘要

A method and system for producing methanol that employs steam methane reforming (SMR) and/or autothermal (ATR) synthesis gas production system, together with a partial oxidation system, is disclosed. The dual mode system and method for producing the synthesis gas in a methanol production process optimizes the efficiency and productivity of the methanol plant by using the partial oxidation based reforming system as an independent source of synthesis gas. The disclosed methods and systems are configurable either as a retrofit to existing methanol production facilities or as an integrated package into newly constructed methanol production facilities.

主权项

1. A method for producing a product composition comprising methanol, comprising the steps of
(i) producing a first stream of synthesis gas having a module greater than 2.0, in a steam methane reformer (SMR) or in a steam methane reformer followed by an autothermal reformer, by reforming a first hydrocarbon feed stream and steam in the presence of a catalyst; (ii) producing a second stream of synthesis gas having a module less than that of the first stream of synthesis gas, by partial oxidation or autothermal reforming of a second hydrocarbon feed stream; (iii) combining the first stream of synthesis gas and the second stream of synthesis gas to form a combined synthesis gas stream; and (iv) synthesizing the combined synthesis gas product stream in a methanol synthesis reactor into a product composition comprising methanol; and further comprising the step of recycling a portion of the excess hydrogen and methane slip formed during synthesis of the product composition comprising methanol to the steam methane reformer.