![]() Addressing this issue, Tiancun Xiao, Peter Edwards, and colleagues in the UK and Saudi Arabia present a microwave cavity perturbation method to examine the type and quantity of coke produced in zeolites catalysing the MTH reaction. However, existing spectroscopies used to interrogate the coke have drawbacks related to the limited sample volume probed, inadequate beam penetration, and a lack of sensitivity to certain forms of coke. As a follow up to my previous post regarding the, I came across the attached image documenting the process of transforming normal cocaine to crack cocaine. Put the coke in the jar and add at a ratio of 1:4 of baking soda (1 part baking soda, 4 parts coke). Characterising the coke that forms is important to understanding and mitigating the catalyst deactivation. 5g, add equal amount baking soda, put in microwave, let cook until oily, drop just one or two very small drops of COLD water directly on top of oil. Get a jar that can withstand heat, like a baby food jar. In catalysing these reactions, zeolites often suffer from deactivation associated with the build-up of hydrocarbon side-products (coke) that deposit on the catalytically active sites. Examples include fluid catalytic cracking, which is used to convert long-chain hydrocarbons in crude oil into shorter-chain molecules found in petrol, and methanol-to-hydrocarbons (MTH) technology that can be used to convert non-crude oil carbon sources, such as biomass, into liquid fuels. ![]() ![]() Many industrial petrochemical reactions proceed over catalysts based on porous aluminosilicates known as zeolites. ![]()
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