Hydrogen carbon accounting tool

The tool was developed under the ISA–ADB initiative as part of Phase 2 of the project ‘Ecosystem Readiness Assessment for Production and Utilisation of Green Hydrogen’.  
This interactive tool facilitates the assessment of Scope 1 and Scope 2 emissions from hydrogen production using various feedstocks (e.g. coal, natural gas, biomass, water) and production pathways (e.g. gasification, gasification with carbon capture, pyrolysis, electrolysis). It supports project developers and policymakers in analysing emissions profiles, enabling evaluation of subsidy eligibility and formulation of policy support mechanisms. Scope 3 and life cycle emissions are excluded, given their project-specific complexity. 
Outputs are generated based on user-defined assumptions across key parameters:      

1. Hydrogen Production Pathway: Selection of the intended production method (e.g. gasification, electrolysis, with or without carbon capture).
2. Feedstock: Choice of applicable feedstocks for hydrogen generation.
3. Energy Content: User-defined calorific values of selected feedstocks.
4. Emission Intensities: Custom or default emission factors for each feedstock.
5. Electricity Mix: National or user-defined electricity generation mix (e.g. renewables, coal, nuclear), with default options available.

Disclaimer:

This tool is currently in draft/beta testing and we appreciate your feedback. This tool is intended to provide indicative output based on information submitted by you, which should be used solely for reference purpose only. The results of this tool are not intended for any commercial usage or reproduction and does not carry any right of publication or disclosure to any other party. Users need to provide assumptions that align with envisaged countries/ projects. A few assumptions have been pre-fixed to facilitate ease of use only. The resulting output and its content do not constitute investment advice, financial advice or any form of recommendation or management decision making. The output provided do not imply any endorsement, assurance, audit or validation by us of any existing or proposed green hydrogen project of any kind or the cost involved therein. These outputs and related content are not binding and should not be relied upon for making any business, investment, or financial decisions of any manner whatsoever. You must exercise your own due diligence and verify the information before making any decisions based on the output. No liability is accepted for its use or for any inaccuracies it may contain. This tool and the resultant output is not a replacement for detailed techno-commercial feasibility and project modelling. 

Acknowledgement

Project Team: (ISA-ADB TA) Dr Mridula Bharadwaj. (ISA) Ramesh Kumar Kuruppath (Chief of Unit - PPIC), S Gautham.       
Technical Reviewers: Ashish Khanna (Director General, ISA), Dr Pradeep Tharakan (Director, Energy Transition, ADB), Tron Andre Svanes (Energy Specialist, ADB).       
The International Solar Alliance extends its gratitude to Emanuele Bianco, Energy Specialist, ADB for his valuable feedback during the course of the project.