铟基催化剂混合晶型调控对CO2加氢制甲醇反应的影响
Effect of Mixed Crystal Phase Control of Indium-Based Catalyst on the Reaction of CO2 Hydrogenation to Methanol
王宇 1李红伟 1吴玉 1胡志海1
作者信息
- 1. 中石化石油化工科学研究院有限公司,北京 100083
- 折叠
摘要
CO2是主要的温室气体,其化工转化近年来成为研究热点.对于CO2加氢制甲醇反应,六方晶型结构铟基催化剂(h-In2O3)具有低CO2转化率和高甲醇选择性,立方晶型结构铟基催化剂(c-In2O3)具有高CO2转化率和低甲醇选择性.为保持六方晶型铟基催化剂的高甲醇选择性且提高其CO2转化率,采用水热法通过控制水热时间,在六方晶型结构的铟基催化剂上添加立方晶型结构,制备得到分别含质量分数33％和62％立方晶型结构的催化剂样品In-33c和In-62c,并评价其催化剂性能.采用XRD、XPS、H2-TPR、CO2-TPD、N2物理吸附-脱附等分析方法对所制备的催化剂进行表征.结果表明:与h-In2O3相比,In-33c和In-62c样品的催化效果均有提升,2种晶型具有协同作用,且In-62c的催化效果优于In-33c;在反应温度300 ℃、反应压力3.0 MPa条件下,In-62c催化剂的CO2转化率达到10.8％、甲醇选择性达到80.4％;与h-In2O3催化剂相比,CO2转化率相对提高了 63.4％,甲醇选择性相对提高了 22.2％.
Abstract
The chemical conversion of CO2,the main greenhouse gas,has become a research hotspot in recent years.For the reaction of CO2 hydrogenation to methanol,the hexagonal indium-based catalyst(h-In2O3)has low CO2 conversion and high methanol selectivity,and the cubic indium-based catalyst(c-In2O3)has high CO2 conversion and low methanol selectivity.In order to maintain the high methanol selectivity of hexagonal indium-based catalyst and improve its CO2 conversion,the hydrothermal method was used to add the cubic crystalline phase structure to the hexagonal indium-based catalyst by controlling the hydrothermal time.Then the catalyst samples In-33c and In-62c with mass fraction of 33％and 62％cubic crystal structure were prepared,of which the catalytic performance was evaluated The catalyst samples were characterized by XRD,XPS,H2-TPR,CO2-TPD and N2 absorption-desorption.The performance evaluation results show that the catalytic effects of In-33c and In-62c are improved as compared with h-In2O3,the two crystal forms have synergistic effect,and In-62c has better catalytic effect than In-33c.At the reaction temperature of 300 ℃ and reaction pressure of 3.0 MPa,the CO2 conversion rate of In-62c catalyst can reach 10.8％and the methanol selectivity is 80.4％,which are respectively increased by 63.4％and 22.2％when compared with the pure phase h-In2O3 catalyst.
关键词
氧化铟/晶型/立方晶型/六方晶型/二氧化碳加氢/甲醇Key words
indium oxide/crystal form/cubic crystal form/hexagonal crystal form/carbon dioxide/hydrogenation/methanol引用本文复制引用
基金项目
国家重点研发计划重点专项(2021YFE0191200)
出版年
2024
NETL
NSTL
万方数据