Improved Catalysts for Shift Conversion

Improved high temperature shift (HTS) catalysts with additional copper promotion can avoid the production of by-products (methane and hydrocarbons) allowing lower steam-to-carbon ratios in the reforming process (Ullmann’s, 2011 p.181 & p.251). Improved low temperature shift (LTS) catalysts can operate at lower temperatures to achieve even lower residual CO content and low by-product production (methanol) (Ullmann’s, 2011 p.181). The low by-product formation increases the reaction process (Worrell and Blok, 1994). 

This measure is applicable to ammonia plants employing two stage shift conversion.

Indian Flag In an Indian plant, the HT conventional shift catalyst was replaced with a low sulphur and copper promoted HT shift catalyst. The benefits were reduced startup time and lower steam-to-carbon ratio in the reformer. It is also expected that ammonia production per unit of catalyst volume will increase. Also, by replacing the conventional low copper LT shift catalyst with a high copper LT shift catalyst the ammonia production per volume of catalyst significantly increased (Patel and Mehta, unknown date).

Development Status Products
Commercial
Ammonia

Improved Catalysts for Shift ConversionCosts & Benefits

Parent Process: Shift Conversion
Energy Savings Potential
CO2 Emission Reduction Potential
Costs

Improved Catalysts for Shift Conversion Tools

Assessment to Action (A2A) Toolkit

Developed by IIP, in collaboration with energy expertsat ICF Marbek, members of the IFA and experts in China, the A2A (Assessment to Action) Toolkit is a free suite of resources on energy management and technology best practices created for ammonia companies. The A2A Toolkit provides a first-order, high-level assessment to identify and prioritize energy efficiency opportunities. It does so by drawing on various assessment modules on technical best practices, management best practices (based on ISO 50001 standard) and productivity improvements.