基于CO2捕集的秸秆低温催化气化制氢过程机理研究

项目名称： 基于CO2捕集的秸秆低温催化气化制氢过程机理研究

项目编号： No.51306066

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 能源与动力工程

项目作者： 李斌

作者单位： 华中科技大学

项目金额： 25万元

中文摘要： 本项目将基于CO2捕集的生物质强化制氢工艺与K盐低温催化有机结合，提出一种基于CO2捕集的秸秆低温(600-700℃)催化气化制氢新工艺。针对该工艺，采用实验研究、理论分析与模拟相结合的方法，从秸秆强化热解、热解挥发分强化重整和CaO循环碳酸化等关键过程机理入手，对其进行深入研究，并把研究重点放在K、Ca协同强化、关键过程耦合这些特性与共性关键问题上，以期深入揭示K、Ca协同对秸秆热解路径与产物选择性的影响机制和对热解挥发分重整制氢的强化作用机理，掌握K盐对CaO循环碳酸化性能影响及其改性途径，建立基于CO2捕集的秸秆低温催化气化制氢系统动力学机理模型。从而全面解答K、Ca协同反应机理及其对制氢过程的强化作用机制，实现在较低温度下农业秸秆高效、清洁、一步转化制氢。本项目的研究成果可为该制氢工艺实际应用提供理论基础与科学依据，并为我国秸秆资源高效转化与高值化利用提供一条新的方法与途径。

中文关键词： 生物质热解气化；CO2吸收；催化；CaO；K盐

英文摘要： Organic combination of CO2 capture enhanced hydrogen production from biomass steam gasification and the low temperature catalysis of potassium salts, a new technology of CO2 capture enhanced hydrogen production from low-temperature (600-700℃) catalytic gasification of straw is proposed in this project. Through experimental research, theoretical analysis and simulation, from the mechanism of the key unit processes including enhanced straw pyrolysis, enhanced volatile reforming and CaO cyclic carbonation, the process mechanism of this technology will be studied in-depth. The research will focus on the special and common key issues of this process such as potassium salts and calcium oxide cooperative enhancement and key unit process coupling, thereby to further reveal the mechanism of the effects of potassium salts and calcium oxide cooperation on the rout of straw pyrolysis and product selectivity and the enhancement mechanism of volatile reforming for hydrogen production, grasp the effect of potassium salts on the performance of CaO carbonation and the upgrading methods, and build the kinetic mechanism model of the whole system of CO2 capture enhanced hydrogen production from low-temperature catalytic gasification of straw, thus comprehensively answer the mechanism of the cooperative effect of potassium salts and

英文关键词： biomass pyrolysis gasification；CO2 absorption；catalysis；CaO；K salts