文献类型：期刊文献

中文题名：基于镍铝催化剂的碳酸盐加氢热解还原反应特性研究

英文题名：Characteristics of Carbonate Hydrogenation Pyrolysis Reduction Reaction Based on Nicked Aluminum Catalyst

作者：窦本浩[1];杜锦标[1];胡兆一[1];周梵[1];代丽娜[1];高云飞[1];王辅臣[1]

机构：[1]华东理工大学资源与环境工程学院,洁净煤技术研究所,上海200237

年份：2025

卷号：51

期号：1

起止页码：10

中文期刊名：华东理工大学学报(自然科学版)

外文期刊名：Journal of East China University of Science and Technology

收录：;北大核心:【北大核心2023】；

基金：国家重点研发项目(2022YFA1504701,2022YFB4101900);国家自然科学基金(22208104);上海市科委启明星项目扬帆专项(22YF1410300);上海市教委晨光计划(21CGA35)。

语种：中文

中文关键词：CO_(2)资源化;Ni基催化剂;白云石;碳酸盐加氢热解还原;催化剂循环

外文关键词：CO_(2)utilization;Ni-based catalyst;dolomite;carbonate hydrogenation pyrolysis reduction;catalyst recycle

摘要：以白云石作为碳酸盐代表性矿物,将Ni/γ-Al_(2)O_(3)催化剂与白云石机械混合后,探讨了H_(2)气氛下碳酸盐催化加氢热解还原过程以及不同工况对该过程的影响。结果表明,Ni/γ-φCO/φCO_(2)Al_(2)O_(3)催化剂可大幅提高碳酸盐的转化效率,气体产物中的CO与CO_(2)的体积分数之比(φCO=φCO_(2))由不加入催化剂时的1.105提升至加入催化剂时的2.622;较高的Ni含量、H_(2)体积分数和较低的反应温度都会促进CH4生成反应,降低CO的选择性;催化剂可通过磁性从固体产物中分离,实验表明催化剂在多次循环反应后仍可保持活性及选择性。
In this study,using dolomite as a representative carbonate mineral,the catalytic hydrogenation and thermal decomposition reduction process of carbonates under a hydrogen gas atmosphere were explored by mechanically mixing Ni/γ-Al_(2)O_(3) catalyst with dolomite.The effects of nNi/nAl,blending ratio,gas velocity,hydrogen concentration,reaction temperature,and stacking method of catalyst and magnesite on the reaction performance were investigated.The results showed that the Ni/γ-Al_(2)O_(3) catalyst could significantly improve the conversion efficiency of φCO/φCO_(2) carbonates,and in the gas products increased from 1.105 without the catalyst to 2.622 with the catalyst.However,excessive nickel content,high hydrogen concentration,and low reaction temperature all promoted the formation of CH4 and reduced the selectivity of CO.The use of magnetism for the separation of catalyst and solid products was employed to enable multiple cycles of reactions,and the catalyst maintained its activity and selectivity after multiple cycles.