What QuestAir's HyQuestor does is to purify hydrogen extracted from LPG. This "purified hydrogen" is then used to fuel fuel cell-powered vehicles like the Toyota FCHV fuel cell car operated by Tokyo Gas and other such vehicles that are taking part in the Japan Hydrogen & Fuel Cell Demonstration Project.

QuestAir president and CEO, Jonathan Wilkinson, feels honoured to be involved in such a high-profile project. According to Wilkinson, "This project demonstrates the flexibility of QuestAir's advanced pressure swing adsorption technology to purify hydrogen generated from a range of fuels, including natural gas and LPG."

Wilkinson also revealed that this was the first time that his company's technology was being used in a Japanese fuelling station and he praised the Japanese Government and industry for making "significant commitments towards the demonstration of fuel cell vehicles and hydrogen infrastructure in Japan."

The HyQuestor unit has drawn praise from Hiromasa Ariga, the manager of the Process Design Group of MKK who praises the unit's ability to "[provide] the high level of hydrogen purity required at the Senju hydrogen station" and its size. According to Ariga, "the HyQuestor is less than half the size of other pressure swing adsorption systems that were considered for this station, which means that the hydrogen generation and purification system could be packaged into a very compact space."

The Senju fuelling station has the capacity to fuel one large fuel cell bus or five fuel cell passenger cars per day and is a joint venture between Tokyo Gas and Nippon Sanso Corporation.