QuestionQuestion

Transcribed TextTranscribed Text

4. A hydrogenation reactor converts benzaldehyde (B) to benzyl alcohol (A) by bubbling hydrogen gas through the liquid reagents in the presence of a catalyst. The reaction is: C7H6O (�) + H2 (�) → C7H8O (�) (�) (�) However, it is possible for the reaction to proceed too far. Additional hydrogenation of benzaldehyde produces toluene (T) and water instead, as shown in the reaction below: C7H6O (�) + 2H2 (�) → C7H8 (�) + H2O (�) (�) (�) The reactor has two feeds: a liquid stream and a gas stream. The liquid feed is 110 mol/s of pure B at 180 °C. The gas stream is pure H2 at 25 °C, and is fed at 0.15 mol H2/mol B fed. All H2 is consumed in the reactor, and the reactor outlet contains 2.00 mol% H2O. The reactor outlet is entirely liquid, and it is maintained at 100 °C. The reactor is cooled by H2O in a jacket around the reactor (the cooling H2O never contacts the reactor contents directly, and may be considered an inert species). The water enters as a liquid at 90 °C, 1 bar absolute and it exits as a vapor at 160 °C, 1 bar absolute. a) The standard heat of formation for liquid benzyl alcohol is not given in Table B.1. To determine this quantity: i) write the balanced reaction for the complete combustion of liquid benzyl alcohol, noting the phases of all products and reactants ii) Use Hess’s Law to calculate ΔĤf,°A(l) from tabulated values of ΔĤc° and ΔĤf° in table B.1 b) Calculate the molar flow rate of each component in the reactor outlet in mol/s c) Calculate the required flow rate of cooling H2O in kg/s. Assume that the heat capacity of liquid B and C is the same value as the heat capacity of liquid T.

Solution PreviewSolution Preview

This material may consist of step-by-step explanations on how to solve a problem or examples of proper writing, including the use of citations, references, bibliographies, and formatting. This material is made available for the sole purpose of studying and learning - misuse is strictly forbidden.

Chemical Engineering Questions
    $18.00 for this solution

    PayPal, G Pay, ApplePay, Amazon Pay, and all major credit cards accepted.

    Find A Tutor

    View available Chemical Engineering Tutors

    Get College Homework Help.

    Are you sure you don't want to upload any files?

    Fast tutor response requires as much info as possible.

    Decision:
    Upload a file
    Continue without uploading

    SUBMIT YOUR HOMEWORK
    We couldn't find that subject.
    Please select the best match from the list below.

    We'll send you an email right away. If it's not in your inbox, check your spam folder.

    • 1
    • 2
    • 3
    Live Chats