Techno-economics of”Teal”Hydrogen Production via Combined Steam Methane Reforming and Biomass Gasification
Cagape, John D.
Danganan, Kim Andrei R.
Galang, Chrissen Juvileen D.
Tomacruz, Jan Goran T.
Castro, Michael T.
Ocon, Joey D.

How to Cite

Cagape J.D., Danganan K.A.R., Galang C.J.D., Tomacruz J.G.T., Castro M.T., Ocon J.D., 2022, Techno-economics of”Teal”Hydrogen Production via Combined Steam Methane Reforming and Biomass Gasification, Chemical Engineering Transactions, 94, 451-456.


The global transition towards net-zero greenhouse gas emissions establishes a need for cleaner energy technologies. Hydrogen is a promising energy carrier whose global demand is steadily increasing and is conventionally produced through steam-methane reforming with carbon capture, or blue H2. Hydrogen production supplied by renewable energy (green H2) is an emerging process, but developing countries are not yet ready for a full transition. Augmenting blue H2 with green H2 production will allow a smoother transition until green H2 costs significantly decrease by 2050. In this work, a novel, low-cost teal hydrogen (teal H2) plant, a mixture of blue and green H2 technologies, located in the Philippines which combines steam-methane reforming, rice husk gasification, and carbon capture by monoethanolamine absorption, is proposed. Setting a production rate of 9,000 kg H2/h, the techno-economic potential of five cases with varying natural gas to rice husk contribution ratios were evaluated using AspenPlus. The levelized cost of the 25:75 teal H2 case at 1.06 USD/kg is cheaper than blue H2 and green H2 by 4.37 and 2.34 USD/kg, respectively. Moreover, the CO2-equivalent emissions of the 25:75 teal H2 case at 0.002 t CO2 -eq/1,000 Nm3 H2 is 57.10 % and 39.25 % lower than those from blue H2 and green H2. As green H2 becomes more economical, rice husk feed to the gasification process can be gradually increased to favor biomass- over petroleum-derived H2. This case study is a successful proof of concept that teal H2 may help transition the energy sector to carbon neutrality.