Photo credit: Gustavo Raskosky / Rice University
Rice University scientists have developed engineered wood that can trap carbon dioxide through a scalable process that is not only energy-efficient, but makes the material even stronger than the real thing. This feat was achieved by finding a way to incorporate molecules of a carbon dioxide-trapping crystalline porous material directly into the wood.
The process involved clearing out the network of cellulose fibers that gives wood its strength through a process known as delignification. This delignified wood is then soaked in a solution containing microparticles of a metal-organic framework (MOF) known as Calgary framework 20 (CALF-20). These are high-surface-area sorbent materials utilized for their ability to adsorb carbon dioxide molecules into their pores.
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The manufacturing of structural materials such as metals or cement represents a significant source of industrial carbon emissions. Our process is simpler and ‘greener’ in terms of both substances used and processing byproducts. The next step would be to determine sequestration processes as well as a detailed economic analysis to understand the scalability and commercial viability of this material,” said Muhammad Rahman, Materials Scientist at Rice University.
