Development and characterization of perlite from Lamba, Albay, Bicol as packing material and the design of a packed column for the absorption of ammonia gasBeatriz San Mateo, Jervin Valorozo, Ma. Niña Jasmer Yturralde and Lola Domnina PestañoMATEC Web Conf., 268 (2019) 04001DOI: https://doi.org/10.1051/matecconf/201926804001