摘要
为解决传统甲醇合成工艺完全依赖化石燃料且伴随大量CO2排放等问题,采用浸渍法制备了分子筛铜基催化剂,并将其用于CO2催化加氢制备甲醇.考察了 CO2和氢气作为混合气的循环次数、反应温度、体积空速和反应压力等对CO2加氢制备甲醇转化率和选择性影响.在反应温度为240 ℃、体积空速为4 000h-1、反应压力为5.0 MPa和混合气循环3次的优化条件下,甲醇的转化率和选择性分别达到95.3％、98.5％,为CO2的低成本、高效利用提供新方向.
Abstract
To address the issues of traditional methanol synthesis processes,which are entirely dependent on fossil fuels and lead to significant carbon dioxide emissions,this study prepared molecular sieve copper-based catalysts using the impregnation method and applied them in the catalytic hydrogenation of carbon dioxide to produce methanol.The effects of the number of cycles of carbon dioxide and hydrogen as feed gases,reaction temperature,space velocity,and reaction pressure on the conversion rate and selectivity of methanol were investigated.Under the optimized conditions of a reaction temperature of 240 ℃,a space velocity of 4000 h-1,a reaction pressure of 5.0 MPa,and three cycles of feed gas,the conversion rate and selectivity of methanol reached 95.3％and 98.5％,respectively.This provides a new direction for the low-cost and efficient utilization of carbon dioxide.
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