Spent petrochemical catalysts are hazardous toxic wastes and dangerous to the environment and human health, due to heavy metals, coke, and other poisonous elements. Researchers over the years focus to utilize and handle the spent catalysts waste to produce other valuable products as an attractive option from environmental and economic points of view. This article generally discusses feasible methods to convert spent petrochemical waste catalysts to value-added products using a thermal plasma torch for the first time. The arc temperature which increases with power increase was measured by optical emission spectroscopy (OES). The result reveals that no spent catalyst waste remains after plasma pyrolysis process and conversion is completely feasible. Furthermore, the major product H₂ for fuel cell was produced, that is environmentally and economically beneficial. Methane, ethane, ethylene, and isobutane were the main products. The best plasma effect on the spent petrochemical catalyst waste in terms of the maximum hydrogen production rate was obtained at 140 A, 30 V, and 3 cc feed injection which causes to produce 53.2% H₂.

用过的石化催化剂是有害的有毒废物，由于重金属，焦炭和其他有毒元素而对环境和人类健康构成危险。多年来，研究人员致力于利用和处理废催化剂废料来生产其他有价值的产品，从环境和经济角度来看，这是一种有吸引力的选择。本文总体上讨论了首次使用热等离子体炬将石化废旧催化剂转化为增值产品的可行方法。通过功率发射光谱法（OES）测量随功率增加而增加的电弧温度。结果表明，等离子热解后没有废催化剂残留，转化完全可行。此外，主要产品H ₂燃料电池的生产，对环境和经济都有利。甲烷，乙烷，乙烯和异丁烷是主要产品。在140 A，30 V和3 cc进料注入的情况下，就最大的氢气产生速率而言，对废石化催化剂废料的最佳等离子体效果是获得的，产生了53.2％的H ₂。