低碳化学与化工2024，Vol.49Issue(1)：33-41,9.DOI:10.12434/j.issn.2097-2547.20230178
均苯三甲酸辅助合成CuZnAlZr催化CO2加氢制甲醇
1,3,5-Benzenetricarboxylic acid assisted synthesis of CuZnAlZr catalysts for CO2 hydrogenation to methanol
摘要
Abstract
CO2 hydrogenation to methanol is one of the important ways to synthesize chemical value-added products,which helps to relieve energy and environmental pressure.CuZnAlZr catalysts for CO2 hydrogenation to methanol were synthesized by co-precipitation method,and the resulting catalysts were characterized by X-ray diffraction(XRD),N2O-H2 titration,N2 adsorption/desorption,H2 temperature programmed reduction(H2-TPR),X-ray photoelectron spectroscopy(XPS),scanning electron microscopy(SEM)and transmission electron microscopy(TEM).And the effects of 1,3,5-benzenetricarboxylic acid(BTC)assisted synthesis on the dispersion of active Cu species in CuZnAlZr catalysts and their catalytic performance were investigated in detail.The results show that after the introduction of BTC into the CuZnAlZr catalysts precursor,the gas products generated by the decomposition in the calcining stage,contributes to the increase of the specific surface area of the catalyst and generates more pore structures,and it also weakens the interaction between Cu and the carrier oxide,which contributes to the dispersion of Cu species.When the amount of BTC introduced into the catalyst is n(BTC)/n(Cu2+)= 1/6,more highly dispersed smaller Cu grains and ZnO crystalline phases existe on the surface of the CuZnAlZr catalysts calcined in air and the enhanced synergy between Cu and ZnO species leds to excellent catalytic performance with CO2 conversion rate and methanol space-time yield up to 27.81%and 278.6 g/(kg·h),respectively.This indicates that the introduction of appropriate amount of BTC in the precursor to assist the synthesis can lead to highly active hydrogenation catalysts with high Cu dispersion and small Cu grains.关键词
均苯三甲酸/CuZnAlZr催化剂/CO2加氢/甲醇Key words
1,3,5-benzenetricarboxylic acid/CuZnAlZr catalysts/CO2 hydrogenation/methanol分类
化学化工引用本文复制引用
罗晶,刘晨龙,徐成华,邓志勇,赵治华,杨方璐,唐静怡..均苯三甲酸辅助合成CuZnAlZr催化CO2加氢制甲醇[J].低碳化学与化工,2024,49(1):33-41,9.基金项目
四川省自然科学基金(2022NSFSC1058) （2022NSFSC1058）
四川省科技厅国际合作项目(2020YFH0133) （2020YFH0133）
四川省中央引导地方科技发展专项-自由探索类(2022ZYD0049). （2022ZYD0049）
