Porous granules formation from oil crops by extrusion process: a theoretical perspective Zaur A. Meretukov, Evgeny P. Koshevoy, Ivan A. Shorstkii and Charles Odilichukwu R. Okpala OCL, 28 (2021) 47 Published online: 12 October 2021 DOI: 10.1051/ocl/2021032