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Does a catalyst increase atom economy?
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Norman C. Berns
Does a catalyst increase atom economy?
Catalysts do have an effect on the atom economy, since catalysts have act sides, they eliminate side products( waste), and they are not considered in the equation for atom economy, thus they will increase the atom economy.
Catalysts do have an effect on the atom economy, since catalysts have act sides, they eliminate side products( waste), and they are not considered in the equation for atom economy, thus they will increase the atom economy.
Thats wrong on so many levels. A catalyst might reduce side reactions, but he doesnt have to. It might even give you the possibility to run a reaction with worse atom economy (but cheaper or faster than alternatives). I dont know what "act sides" should be and google doesnt find anything either. And strictly speaking if you dont recover the catalyst it is lost and decreases atom economy.More
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using catalysts mean lower temperatures and pressures can be used. so energy saved, meaning less co2 is released, and fossil fuel reserves are preserved. catalysts can also reduce waste by allowing a different reaction to be used with a better atom economy.
Charlie Rich, EV and Renewables FanaticFollowFollowing
using catalysts mean lower temperatures and pressures can be used. so energy saved, meaning less co2 is released, and fossil fuel reserves are preserved. catalysts can also reduce waste by allowing a different reaction to be used with a better atom economy.
to get familiar with this site. Mathematical expressions and equations can be More
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There are a couple of ways to think about this. First, considering your atom economy equation. Typically a catalyst is used in place of a stoichiometric reagent. A catalyst is (strictly speaking) not a reagent, so its effect on the atom economy is neutral. The alternative stoichiometric reagent is a reactant, so it will reduce the atom economy. This leads to the conclusion that a catalytic method offers a better atom economy than an alternative, non-catalytic method.
From a slightly different point of view, atom economy is one aspect of measuring the amount of waste that comes out of a reaction. A more relevant quantity is really the ratio of the mass of the desired product(s) to the total mass of all of the reaction inputs (including reactants, catalysts, solvents, purification materials, etc). Since catalysts can be used in smaller amounts than stoichiometric reagents, there will physically be less mass put into the process, which increases that ratio.
There are a couple of ways to think about this. First, considering your atom economy equation. Typically a catalyst is used in place of a stoichiometric reagent. A catalyst is (strictly speaking) not a reagent, so its effect on the atom economy is neutral. The alternative stoichiometric reagent is a reactant, so it will reduce the atom economy. This leads to the conclusion that a catalytic method offers a better atom economy than an alternative, non-catalytic method.
From a slightly different point of view, atom economy is one aspect of measuring the amount of waste that comes out of a reaction. A more relevant quantity is really the ratio of the mass of the desired product(s) to the total mass of all of the reaction inputs (including reactants, catalysts, solvents, purification materials, etc). Since catalysts can be used in smaller amounts than stoichiometric reagents, there will physically be less mass put into the process, which increases that ratio.
It's a bit of a blanket assumption as processes exist where the catalyst is over-stoichiometric. This would knock the atom economy argument on the head. Also one could argue that the catalytic reaction is no different as without a catalyst, the reaction still occurs albeit more slowly, all other things being equal. It's a completely reaction specific consideration. Technically the catalyst mass shouldn't be included in the calculation. Atom economy is a bit of a misleading measure, mass intensity is better.
It's a bit of a blanket assumption as processes exist where the catalyst is over-stoichiometric. This would knock the atom economy argument on the head. Also one could argue that the catalytic reaction is no different as without a catalyst, the reaction still occurs albeit more slowly, all other things being equal. It's a completely reaction specific consideration. Technically the catalyst mass shouldn't be included in the calculation. Atom economy is a bit of a misleading measure, mass intensity is better.
Catalysts do have an effect on the atom economy, since catalysts have act sides, they eliminate side products( waste), and they are not considered in the equation for atom economy, thus they will increase the atom economy.
Catalysts do have an effect on the atom economy, since catalysts have act sides, they eliminate side products( waste), and they are not considered in the equation for atom economy, thus they will increase the atom economy.
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using catalysts mean lower temperatures and pressures can be used. so energy saved, meaning less co2 is released, and fossil fuel reserves are preserved. catalysts can also reduce waste by allowing a different reaction to be used with a better atom economy.
using catalysts mean lower temperatures and pressures can be used. so energy saved, meaning less co2 is released, and fossil fuel reserves are preserved. catalysts can also reduce waste by allowing a different reaction to be used with a better atom economy.
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There are a couple of ways to think about this. First, considering your atom economy equation. Typically a catalyst is used in place of a stoichiometric reagent. A catalyst is (strictly speaking) not a reagent, so its effect on the atom economy is neutral. The alternative stoichiometric reagent is a reactant, so it will reduce the atom economy. This leads to the conclusion that a catalytic method offers a better atom economy than an alternative, non-catalytic method.
From a slightly different point of view, atom economy is one aspect of measuring the amount of waste that comes out of a reaction. A more relevant quantity is really the ratio of the mass of the desired product(s) to the total mass of all of the reaction inputs (including reactants, catalysts, solvents, purification materials, etc). Since catalysts can be used in smaller amounts than stoichiometric reagents, there will physically be less mass put into the process, which increases that ratio.
There are a couple of ways to think about this. First, considering your atom economy equation. Typically a catalyst is used in place of a stoichiometric reagent. A catalyst is (strictly speaking) not a reagent, so its effect on the atom economy is neutral. The alternative stoichiometric reagent is a reactant, so it will reduce the atom economy. This leads to the conclusion that a catalytic method offers a better atom economy than an alternative, non-catalytic method.
From a slightly different point of view, atom economy is one aspect of measuring the amount of waste that comes out of a reaction. A more relevant quantity is really the ratio of the mass of the desired product(s) to the total mass of all of the reaction inputs (including reactants, catalysts, solvents, purification materials, etc). Since catalysts can be used in smaller amounts than stoichiometric reagents, there will physically be less mass put into the process, which increases that ratio.
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It's a bit of a blanket assumption as processes exist where the catalyst is over-stoichiometric. This would knock the atom economy argument on the head. Also one could argue that the catalytic reaction is no different as without a catalyst, the reaction still occurs albeit more slowly, all other things being equal. It's a completely reaction specific consideration. Technically the catalyst mass shouldn't be included in the calculation. Atom economy is a bit of a misleading measure, mass intensity is better.
It's a bit of a blanket assumption as processes exist where the catalyst is over-stoichiometric. This would knock the atom economy argument on the head. Also one could argue that the catalytic reaction is no different as without a catalyst, the reaction still occurs albeit more slowly, all other things being equal. It's a completely reaction specific consideration. Technically the catalyst mass shouldn't be included in the calculation. Atom economy is a bit of a misleading measure, mass intensity is better.
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