@article { author = {Nouralishahi, A. and Bahaeddini, M. and Rashidi, A. and Mahinnezhad, Sh. and Fazeli, A.}, title = {Activated nanoporous carbon from walnut shell as a promising adsorbent for methane storage in adsorbed natural gas technology}, journal = {Scientia Iranica}, volume = {26}, number = {6}, pages = {3447-3455}, year = {2019}, publisher = {Sharif University of Technology}, issn = {1026-3098}, eissn = {2345-3605}, doi = {10.24200/sci.2019.51790.2373}, abstract = {AbstractActivated carbon from walnut shell is studied for methane storage in this research. The samples are ‎synthesized by zinc chloride and phosphoric acid, as activating agents. The effect of physical ‎activation, after chemical activation steps, on the final structure of the samples and their total methane ‎storage is examined. The results show that physical activation has an improving effect on the total ‎capacity of the samples activated by phosphoric acid, however; it has a reverse effect on the ‎capacity of zinc chloride activated ones. The experimental data show that the best capacity is ‎obtained at impregnation ratios of 0.7 and 1.2 in the case of phosphoric acid and zinc chloride ‎activated samples, respectively. The best sample is the one activated by phosphoric acid with ‎impregnation ratio of 0.7 and subsequently physically activated by carbon dioxide. It has the BET ‎surface area of 1479 m2/g, average pore diameter of 4.2 nm, total pore volume of 0.84 cm3/g and ‎methane adsorption capacity of 159 cm3/g. The sample shows high stability during successive ‎adsorption/desorption cycles experiment. ‎}, keywords = {ANG,Activated Carbon,Methane,Nano-porous adsorbents,Wallnut shell}, url = {https://scientiairanica.sharif.edu/article_21553.html}, eprint = {https://scientiairanica.sharif.edu/article_21553_b3c8e4f2eb7a4f6d144ff7f83d55332c.pdf} }