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  2. Catalysis - Wikipedia

    en.wikipedia.org/wiki/Catalysis

    The reaction occurs in two steps: 2 NO + O 2 → 2 NO 2 (rate-determining) NO 2 + SO 2 → NO + SO 3 (fast) The NO catalyst is regenerated. The overall rate is the rate of the slow step [14] v=2k 1 [NO] 2 [O 2]. An example of heterogeneous catalysis is the reaction of oxygen and hydrogen on the surface of titanium dioxide (TiO 2, or titania) to ...

  3. Catalytic cycle - Wikipedia

    en.wikipedia.org/wiki/Catalytic_cycle

    In such loops, the initial step entails binding of one or more reactants by the catalyst, and the final step is the release of the product and regeneration of the catalyst. Articles on the Monsanto process, the Wacker process, and the Heck reaction show catalytic cycles. Catalytic cycle for conversion of A and B into C

  4. Heterogeneous catalysis - Wikipedia

    en.wikipedia.org/wiki/Heterogeneous_catalysis

    Hydrogenation of ethene on a catalytic solid surface (1) Adsorption (2) Reaction (3) Desorption. Heterogeneous catalysis is catalysis where the phase of catalysts differs from that of the reagents or products. [1] The process contrasts with homogeneous catalysis where the reagents, products and catalyst exist in the same phase.

  5. Enzyme catalysis - Wikipedia

    en.wikipedia.org/wiki/Enzyme_catalysis

    These conformational changes also bring catalytic residues in the active site close to the chemical bonds in the substrate that will be altered in the reaction. After binding takes place, one or more mechanisms of catalysis lowers the energy of the reaction's transition state, by providing an alternative chemical pathway for the reaction.

  6. Reactions on surfaces - Wikipedia

    en.wikipedia.org/wiki/Reactions_on_surfaces

    The reaction order is 1 with respect to B and −1 with respect to A. Reactant A inhibits the reaction at all concentrations. The following reactions follow a Langmuir–Hinshelwood mechanism: [4] 2 CO + O 2 → 2 CO 2 on a platinum catalyst. CO + 2H 2 → CH 3 OH on a ZnO catalyst. C 2 H 4 + H 2 → C 2 H 6 on a copper catalyst. N 2 O + H 2 ...

  7. Monsanto process - Wikipedia

    en.wikipedia.org/wiki/Monsanto_process

    The catalytic cycle involves two non-organometallic steps: conversion of methanol to methyl iodide and the hydrolysis of the acetyl iodide to acetic acid and hydrogen iodide. [4] The reaction has been shown to be first-order with respect to methyl iodide and [Rh(CO) 2 I 2] −.

  8. Bosch reaction - Wikipedia

    en.wikipedia.org/wiki/Bosch_reaction

    The Bosch reaction is a catalytic chemical reaction between carbon dioxide (CO 2) and hydrogen (H 2) that produces elemental carbon (C,graphite), water, and a 10% return of invested heat. CO 2 is usually reduced by H 2 to carbon in presence of a catalyst (e.g. iron (Fe)) and requires a temperature level of 530–730 °C (986–1,346 °F).

  9. Oxidative addition - Wikipedia

    en.wikipedia.org/wiki/Oxidative_addition

    Oxidative addition and reductive elimination are invoked in many catalytic processes in homogeneous catalysis, e.g., hydrogenations, hydroformylations, hydrosilylations, etc. [5] Cross-coupling reactions like the Suzuki coupling, Negishi coupling, and the Sonogashira coupling also proceed by oxidative addition.