Exhibit 10.6


 


THIS PROMISSORY NOTE (“NOTE”) HAS
NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE “SECURITIES ACT”).  THIS NOTE HAS BEEN ACQUIRED
FOR INVESTMENT ONLY AND MAY NOT BE SOLD, TRANSFERRED OR ASSIGNED IN THE ABSENCE OF REGISTRATION OF THE RESALE THEREOF UNDER THE SECURITIES
ACT OR AN OPINION OF COUNSEL REASONABLY SATISFACTORY IN FORM, SCOPE AND SUBSTANCE TO THE COMPANY THAT SUCH REGISTRATION IS NOT REQUIRED.


 


PROMISSORY NOTE


 


	Principal Amount:  $300,000	 Dated as of February 12, 2021


 


Pyrophyte Acquisition Corp., a
Cayman Islands exempted company (the “Maker”), promises to pay to the order of Pyrophyte Acquisition LLC, a Delaware
limited liability company or its registered assigns or successors in interest (the
 “Payee”), or order, the principal sum of Three Hundred Thousand Dollars ($300,000) or such lesser amount as shall have
been advanced by Payee to Maker and shall remain unpaid under this Note on the Maturity Date (as defined below) in lawful money of the
United States of America, on the terms and conditions described below.  All payments on this Note shall be made by check or
wire transfer of immediately available funds or as otherwise determined by the Maker to such account as the Payee may from time to time
designate by written notice in accordance with the provisions of this Note.


 


1.     Principal. The
entire unpaid principal balance of this Note shall be payable on the earlier of: (i) December 31, 2021 or (ii) the date
on which Maker consummates an initial public offering (the “IPO”) of its securities (such earlier date, the “Maturity
Date”). The principal balance may be prepaid at any time. Under no circumstances shall any individual, including but not
limited to any officer, director, employee or shareholder of the Maker, be obligated personally for any obligations or liabilities of
the Maker hereunder.


 


2.     Interest. No
interest shall accrue on the unpaid principal balance of this Note.


 


3.     Application
of Payments. All payments shall be applied first to payment in full of any costs incurred in the collection of any sum due under
this Note, including (without limitation) reasonable attorney’s fees, then to the payment in full of any late charges and finally
to the reduction of the unpaid principal balance of this Note.


 


4.     Events
of Default. The following shall constitute an event of default (“Event of Default”):


 


(a)          Failure
to Make Required Payments. Failure by Maker to pay the principal amount due pursuant to this Note within five (5) business days
of the date specified above.


 


(b)          Voluntary
Bankruptcy, Etc. The commencement by Maker of a voluntary case under any applicable bankruptcy, insolvency, reorganization, rehabilitation
or other similar law, or the consent by it to the appointment of or taking possession by a receiver, liquidator, assignee, trustee, custodian,
sequestrator (or other similar official) of Maker or for any substantial part of its property, or the making by it of any assignment for
the benefit of creditors, or the failure of Maker generally to pay its debts as such debts become due, or the taking of corporate action
by Maker in furtherance of any of the foregoing.


 


(c)          Involuntary
Bankruptcy, Etc. The entry of a decree or order for relief by a court having jurisdiction in the premises in respect of Maker in an
involuntary case under any applicable bankruptcy, insolvency or other similar law, or appointing a receiver, liquidator, assignee, custodian,
trustee, sequestrator (or similar official) of Maker or for any substantial part of its property, or ordering the winding-up or liquidation
of its affairs, and the continuance of any such decree or order unstayed and in effect for a period of 60 consecutive days.


 


5.     Remedies.


 


(a)          Upon
the occurrence of an Event of Default specified in Section 4(a) hereof, Payee may, by written notice to Maker, declare
this Note to be due immediately and payable, whereupon the unpaid principal amount of this Note, and all other amounts payable
thereunder, shall become immediately due and payable without presentment, demand, protest or other notice of any kind, all of which
are hereby expressly waived, anything contained herein or in the documents evidencing the same to the contrary notwithstanding.


 






     


     


    

 


(b)          Upon
the occurrence of an Event of Default specified in Sections 4(b) or 4(c), the unpaid principal balance of this Note, and all other
sums payable with regard to this Note, shall automatically and immediately become due and payable, in all cases without any action on
the part of Payee.


 


6.     Waivers. Maker
and all endorsers and guarantors of, and sureties for, this Note waive presentment for payment, demand, notice of dishonor, protest, and
notice of protest with regard to the Note, all errors, defects and imperfections in any proceedings instituted by Payee under the terms
of this Note, and all benefits that might accrue to Maker by virtue of any present or future laws exempting any property, real or personal,
or any part of the proceeds arising from any sale of any such property, from attachment, levy or sale under execution, or providing for
any stay of execution, exemption from civil process, or extension of time for payment; and Maker agrees that any real estate that may
be levied upon pursuant to a judgment obtained by virtue hereof, on any writ of execution issued hereon, may be sold upon any such writ
in whole or in part in any order desired by Payee.


 


7.     Unconditional
Liability. Maker hereby waives all notices in connection with the delivery, acceptance, performance, default, or enforcement
of the payment of this Note, and agrees that its liability shall be unconditional, without regard to the liability of any other party,
and shall not be affected in any manner by any indulgence, extension of time, renewal, waiver or modification granted or consented to
by Payee, and consents to any and all extensions of time, renewals, waivers, or modifications that may be granted by Payee with respect
to the payment or other provisions of this Note, and agrees that additional makers, endorsers, guarantors, or sureties may become parties
hereto without notice to Maker or affecting Maker’s liability hereunder.


 


8.     Notices. All
notices, statements or other documents which are required or contemplated by this Agreement shall be: (i) in writing and delivered
personally or sent by first class registered or certified mail, overnight courier service or facsimile or electronic transmission to the
address designated in writing, (ii) by facsimile to the number most recently provided to such party or such other address or fax
number as may be designated in writing by such party and (iii) by electronic mail, to the electronic mail address most recently provided
to such party or such other electronic mail address as may be designated in writing by such party.  Any notice or other communication
so transmitted shall be deemed to have been given on the day of delivery, if delivered personally, on the business day following receipt
of written confirmation, if sent by facsimile or electronic transmission, one (1) business day after delivery to an overnight courier
service or five (5) days after mailing if sent by mail.


 


9.     Construction. THIS
NOTE SHALL BE CONSTRUED AND ENFORCED IN ACCORDANCE WITH THE LAWS OF NEW YORK, WITHOUT REGARD TO CONFLICT OF LAW PROVISIONS THEREOF.


 


10.   Severability. Any
provision contained in this Note which is prohibited or unenforceable in any jurisdiction shall, as to such jurisdiction, be ineffective
to the extent of such prohibition or unenforceability without invalidating the remaining provisions hereof, and any such prohibition or
unenforceability in any jurisdiction shall not invalidate or render unenforceable such provision in any other jurisdiction.


 


11.   Trust
Waiver.  Notwithstanding anything herein to the contrary, the Payee hereby waives any and all right, title, interest or
claim of any kind (“Claim”) in or to any distribution of or from the trust account to be established in which the proceeds
of the IPO conducted by the Maker (including the deferred underwriters discounts and commissions) and the proceeds of the sale of the
warrants issued in a private placement to occur prior to the consummation of the IPO are to be deposited, as described in greater detail
in the registration statement and prospectus to be filed with the Securities and Exchange Commission in connection with the IPO, and hereby
agrees not to seek recourse, reimbursement, payment or satisfaction for any Claim against the trust account for any reason whatsoever.


 


12.   Amendment;
Waiver.  Any amendment hereto or waiver of any provision hereof may be made with, and only with, the written consent of
the Maker and the Payee.


 


13.   Assignment.  No
assignment or transfer of this Note or any rights or obligations hereunder may be made by any party hereto (by operation of law or otherwise)
without the prior written consent of the other party hereto and any attempted assignment without the required consent shall be void.


 


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IN
WITNESS WHEREOF, Maker, intending to be legally bound hereby, has caused this Note to be duly executed by the undersigned as
of the day and year first above written.


 


	 	
    PYROPHYTE ACQUISITION CORP.

    a Cayman Islands exempted company

	 	 	 
	 	By:	/s/ Sten L. Gustafson
	 	 	Name: Sten L. Gustafson
	 	 	Title:  Director


 


[Signature
Page to Promissory Note]