POWER OF ATTORNEY

     Know all by these presents, that the undersigned hereby
constitutes and appoints Matthew Beale and Tracy Kern,
and each of them, signing singly, as the undersigned's true and
lawful attorney-in-fact to:

(a)	execute for and on behalf of the undersigned, in the
undersigned's capacity as an officer and/or director of CDTI
Advanced Materials, Inc. (the "Company"), Forms 3, 4 and 5 in
accordance with Section 16(a) of the Securities Exchange Act of
1934 and the rules thereunder;

(b)	do and perform any and all acts for and on behalf of the
undersigned which may be necessary or desirable to complete and
execute any such Forms 3, 4 or 5, complete and execute any
amendment or amendments thereto, and file such form with the
United States Securities and Exchange Commission, and any stock
exchange or similar authority; and

(c)	take any other action of any type whatsoever in
connection with the foregoing which, in the opinion of such
attorney-in-fact, may be of benefit to, in the best interest of,
or legally required by, the undersigned, it being understood that
the documents executed by such attorney-in-fact on behalf of the
undersigned pursuant to this Power of Attorney shall be in such
form and shall contain such terms and conditions as such
attorney-in-fact may approve in such attorney-in-fact's
discretion.

     The undersigned hereby grants to each such attorney-in-fact
full power and authority to do and perform any and every act and
thing whatsoever requisite, necessary or proper to be done in the
exercise of any of the rights and powers herein granted, as fully
to all intents and purposes as the undersigned might or could do
if personally present, with full power of substitution or
revocation, hereby ratifying and confirming all that such
attorney-in-fact, or such attorney-in-fact's substitute or
substitutes, shall lawfully do or cause to be done by virtue of
this power of attorney and the rights and powers herein granted.
The undersigned acknowledges that the foregoing attorneys-in-fact,
in serving in such capacity at the request of the undersigned, are
not assuming, nor is the Company assuming, any of the
undersigned's responsibilities to comply with Section 16 of the
Securities Exchange Act of 1934.

    This Power of Attorney shall remain in full force and effect
until the undersigned is no longer required to file Forms 3, 4
or 5 with respect to the undersigned's holdings of and
transactions in securities issued by the Company, unless earlier
revoked by the undersigned in a signed writing delivered to
the foregoing attorneys-in-fact.

     IN WITNESS WHEREOF, the undersigned has caused this Power
of Attorney to be executed as of this 14th day of August, 2018.

				/s/Bob Li-Shyng Ching
				Bob Li-Shyng Ching