Hans Vrijenhoef, born in Rotterdam in 1958, studied chemical engineering at the Technical university Delft and Graduated in 1982. After various jobs in the Exxon Mobil and Kemira’s  large scale ammonia operations in Rotterdam Europoort, he started Proton Ventures BV in 2001, with the aim to green society by using green ammonia.

Hans Vrijenhoef has been and continues to be involved in hydrogen and/or ammonia projects worldwide to realise his ambition to green our society, making use of renewable energy as much as possible on an affordable way.

As President of the Ammonia Energy Association he was actively promoting knowledge exchange between members, partners and students in the domain of clean/ Green ammonia production and applications. In the new role of Past President the roles will be more supporting the existing President

He is holding ammonia conferences in Chili and Netherlands and he also started to support start-up companies in the field of clean ammonia production, storage and applications. And now again he leads Proton Ventures BV into a new era where as well small as big ammonia projects will be supported by Proton’s engineering team.