Bitcoin isn’t solely associated with the black market anymore. There were a few media outlets that were often quoted as a publishing that but public opinion has long since changed.
The media has been very positive about Blockchain technology and constantly writes about the good it can bring. However, I don’t see much of a need of suitable application when it comes to refugees. Logic would tell me that they’d prefer charity in the form of a widely accepted currency that they can spend where and when they need to.
Whilst the issues with those that lack identification is definitely a pressing matter, I think there are better alternatives as realistically there isn’t enough infrastructure to support this technology in these communities.
I admire your desire to help but I seriously don’t get the point in this as there are many more suitable, simple  and effective ways of tackling the problems you aim to address with the above.