فهرست مقالات acid treatment دسترسی آزاد مقاله صفحه چکیده متن کامل 1 - Co Catalysts Supported on Activated Clay for Selective Hydrogenation of Acetylene to Ethylene Aizat Aitugan Sandugash Tanirbergenova Yerbol Tileuberdi Onuralp Yucel Dildara Tugelbayeva Zulkhair Mansurov