Pyramid E&C offers cost-effective, modular plants capable of producing hydrogen using natural gas and other hydrocarbon feedstocks. The scheme consists of a proprietary compact Steam Methane Reformer and a shift conversion reactor. The process comprises of following steps:
- Gas Treatment and Compression
- Shift Conversion
- Hydrogen Purification
Gas Treatment and Compression
Natural gas is treated to remove hydrocarbon liquids, water and acid gases and preheated in the waste heat recovery section of the reformer. After preheating, the gas is fed to hydrogenator where the organic sulfur compounds are converted into H2S which is removed by adsorption of it on solid bed scavenger.
Treated gas is passed though pre-reformer where mixture of natural gas and steam preheated in waste heat recovery section are blended resulting in stable operating conditions for steam methane reforming, where conversion of hydrocarbons to hydrogen, carbon monoxide and carbon dioxide takes place over a reforming catalyst. Product gas from the reformer is cooled by raising steam before entering the shift converter.
CH4+H2O -> CO+3H2
CH4+2H2O -> CO2+4H2
The cooled gas from the reformer sent over the shift catalyst to lower the concentration of carbon monoxide in the gas and increase the yield of hydrogen. The water gas shift (WGS) reactor converts carbon mono oxide and steam to hydrogen and carbon dioxide. The gas from shift converter is cooled further to ambient temperature before entering the PSA unit
High purity hydrogen product is obtained in Pressure Swing Adsorption (PSA) Unit. At high pressures, the off gases are adsorbed and pure H2 is obtained in main gas stream. Off-gases are released during low pressure cycle and used in the reformer as fuel supplement with natural gas.
Pyramid E&C also supplies factory assembled containerized unit to produce 100/ 500/ 1000 Nm3/hr. Hydrogen production in capacity, learn more…