In the following link, it is possible to see the location of the conference, and the nearest hotels.
Hotel information :http://www.bcn.es/cgi-guia/guiamap4/cgi-guia/?actives=B001B002B003B004B005B009B010B011B012B013B014B015D006&zoom=1&scl=6&cnt=32091.660%2C81928.890&plt=&plant=capes4a&txt1=&txt2=&idioma=2
Also there are many web sites to look for hotel in Barcelona. Some of them are:
We strongly recommend making hotel reservations as soon as possible since
Barcelona is expected to be very busy during the conference