In principle yes, you should be due some form of compensation by Air India for a 30-hour delay. Indeed, their conditions of carriage state:

Article 11 - REFUNDS

11.1 GENERAL

On failure by Carrier to provide carriage in accordance with the Contract of carriage, or where the passenger requests a voluntary change of his or her arrangements, refund for an unused ticket or portion thereof shall be made by Carrier in accordance with this Article and with Carrier’s Regulations.

11.2 PERSON TO WHOM REFUND WILL BE MADE

11.2.1 Except as herein after provided in this Article, Carrier shall be entitled to make refund either to the person named in the ticket, or to the person who has paid for the ticket upon presentation of satisfactory proof. In the even payment for the ticket is made through a travel agent, refund shall normally be made through such travel agent.

11.2.2 If a ticket has been paid for by a person other than the passenger named in the ticket, and Carrier has indicated on the ticket that there is a restriction on refund, Carrier shall make a refund only to the person paying for the ticket or to that person’s order.

11.2.3 Except in the case of lost tickets, refunds will only be made on surrender to Carrier of the passenger coupon or passenger receipt and surrender of all unused flight coupons.

11.2.4 A refund made to anyone presenting the passenger coupon on passenger receipt and all unused flight coupons and holding himself or herself out as a person to whom refund may be made in terms of 11.2.2 shall be deemed a proper refund and shall discharge Carrier from liability and any further claim for refund.

11.3 INVOLUNTARY REFUNDS

If Carrier cancels a flight, fails to operate a flight reasonable according to schedule, fails to stop at a point to which the passenger is destined or ticketed to stop over, is unable to provide previously confirmed space or causes the passenger to miss a connecting flight on which the passenger holds a reservation, the amount of the refunds shall be:

11.3.1 If no portion of the ticket has been used, an amount equal to the fare paid;

11.3.2 If a portion of the ticket has been used, the refund will be the higher of;

11.3.3 The one way fare (less applicable discounts and charges) from point of interruption to destination or point of next stopover, or

11.3.4 The difference between the fare paid and the fare for the transportation used.

11.4 VOLUNTARY REFUNDS

If the passenger wishes a refund of his or her ticket for reasons other than those set out in Paragraphs of this Article the amount of the refund shall be:

11.4.1 If a portion of the ticket has been used, the refund will be an amount equal to the difference between the fare paid and the applicable fare for travel between the points for which the ticket has been used, less any applicable service charges or cancellation fees.

You should probably get in touch with Air India themselves to see how to claim the refund. However, actually getting the refund might be harder than expected. The internet is scattered with stories of people trying to claim a refund on Air India flights without success.